Re: [Discuss] Fedora 28 Doesn't See External DVD Drive on USB Port
Hi, David. Thank you very much for this information. Sorry it has taken me this long to respond to it! I ran the cat command and for once something I did in the Terminal window worked immediately. Here is what it gave me: # # /etc/fstab # Created by anaconda on Thu Jul 19 00:01:06 2018 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # /dev/mapper/fedora_localhost--live-root / ext4 defaults1 1 UUID=84fb2b0b-8657-4e21-ba3a-35a140c62cb1 /boot ext4 defaults1 2 UUID=BC87-05C2 /boot/efi vfat umask=0077,shortname=winnt 0 2 /dev/mapper/fedora_localhost--live-home /home ext4 defaults1 2 /dev/mapper/fedora_localhost--live-swap swapswap defaults0 0 Since I last wrote anything, I've successfully plugged in an ancient HP Personal Media Drive, which showed up immediately. (Now if I could just find a way to read the qic files on it ...) So Nautilus successfully idenfied a new device (which the fstab file should show, right?) Maybe the DVD drive is just a bum drive. It shows up in Windows, though ... Thanks for the information you provided. --Nancy On Sat, Dec 29, 2018 at 11:51 PM David Kramer wrote: > I doubt the solution to that other person's problem is the same one you > are having, but it's possible. Let me explain it in more detail, > because it actually has nothing to do with external DVD drives > specifically, which is muddying the waters. > > These days, most storage devices emulate the old SCSI (Small Computer > System Interface) standard at the API level. That is, the hardware is > different, but the commands that an OS or BIOS would send to an old SCSI > drive. That's why the devices are named /dev/sda, dev/sdb, etc. The > devices are named in order as they are discovered, so the main drive is > /dev/sda, and if you have a second disk it would be /dev/sdb. > > Partitions are named by appending the partition number to the device > they are on. The first partition on the first device is /dev/sda1, and > the second partition would be /dev/sda2. > > Let's say you plug in a thumb drive after that. That would be the third > disk, so it would be /dev/sdc. If you then plugged in your external > DVD drive, it would probably be /dev/sdd. That all works pretty well. > > Here's the problem: Let's say you have some configuration file, whatever > it is, that refers to a disk, because you have a second hard drive in > your computer. let's call it /dev/sdb. Now let's say you plug in your > external DVD player and it comes up as /dev/sdc, and all is right with > the world. > > BUT: If you remove that second drive from your computer and there is no > longer a /dev/sdb, and you do not update that configuration file, then > when you add your external DVD player, it will come up as /dev/sdb > instead. That configuration file is telling your computer that /dev/sdb > is something else. And there we have the problem. > > Now this file in particular, /etc/fstab (and you need to use sudo to > edit it) tells the computer what each drive is for and how to mount it > and to where. It is a BAD file to have incorrect information in for > that reason, and that is the problem described in your mail. I doubt > that's your problem, but if you send us the contents of that file, we > may be able to confirm. > > Some good news: There IS a better way. Partitions can also be identified > by user-specified labels, and that eliminates the whole > who-got-connected-first problem. It also lets you set up rules, like > automatically mounting THIS particular external USB device, but not this > other one. > > Hope that helps. > > > On 12/29/18 10:12 PM, Nancy Allison wrote: > > Thank you, Dan. > > > > You've provided some details that I can follow, but I am not well enough > > grounded to know how I would use them. (For example, I have no idea where > > fstab lives or how I get to it.) If I can find someone to help me out > > painstakingly, with a generous donation of their time and effort, I > (they, > > really) can undoubtedly fix the problem. I may wait until the next > > InstallFest for help. > > > > But this leaves me wondering, can it really be that everyone using Fedora > > 28 struggles along with this same problem that obviously affects plenty > of > > people? CDs and DVDs are not used as much as they once were, but they are > > still in use. If you google "fedora 28 doesn't recognize external dvd > > drive" you get people struggling with this back in 2010 and 2011. Is this > > what Fedora is like -- everyone struggles with problems individually? And > > you really have to have a lot of technical knowledge to deal with these > > problems as they come up. Maybe Fedora is just too tecchie for me, but it > > seems as if Ubuntu was, too, when I used it before Fedora. Maybe Red Hat > is > >
Re: [Discuss] Fedora 28 Doesn't See External DVD Drive on USB Port
Hi, Charles! Windows 10 sees it. It is connected through a USB only, but I see a connector with a round pin in it, so maybe it also has a power cord. I've been googling to see what comes with it, but it is an odd product and information is scarce and I can't tell if it originally shipped with a power cord. It's a few years old. Windows Device Manager identifies it as TSSTcorp CDDVDW TS-L632H ATA Device. If I can identify a separate power cord, would that make a difference? Thanks! --Nancy On Sun, Dec 30, 2018 at 11:01 PM Anderson, Charles R wrote: > Ok, so the kernel is not seeing the USB device. Does the drive and USB > cable work on another computer? Does it work on the same computer with a > different OS? Does the DVD drive have a separate power cord and are you > plugging that in, or are you relying on USB to power the drive directly? > > On Sun, Dec 30, 2018 at 06:44:47PM -0500, Nancy Allison wrote: > > Hello, all. > > > > Charles, Fedora 28 was installed fresh; Ubuntu had been on the system > > previously. > > > > I ran the lsusb command first before connecting the DVD drive and again > > after. The list of devices did not change. > > > > Here is the output of the two commands: > > > > [theauthor@new-host-2 ~]$ lsusb > > Bus 001 Device 002: ID 8087:8001 Intel Corp. > > Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > > Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub > > Bus 002 Device 003: ID 13d3:5652 IMC Networks > > Bus 002 Device 002: ID 8087:07dc Intel Corp. > > Bus 002 Device 006: ID 04f9:0062 Brother Industries, Ltd > > Bus 002 Device 064: ID 046d:c52b Logitech, Inc. Unifying Receiver > > Bus 002 Device 063: ID 1a40:0101 Terminus Technology Inc. Hub > > Bus 002 Device 005: ID 0409:0058 NEC Corp. HighSpeed Hub > > Bus 002 Device 004: ID 0424:2507 Standard Microsystems Corp. hub > > Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > > [theauthor@new-host-2 ~]$ dmesg | grep sd > > [1.585719] ahci :00:1f.2: flags: 64bit ncq pm led clo only pio > slum > > part deso sadm sds apst > > [1.923206] sd 0:0:0:0: Attached scsi generic sg0 type 0 > > [1.923302] sd 0:0:0:0: [sda] 1465149168 512-byte logical blocks: (750 > > GB/699 GiB) > > [1.923341] sd 0:0:0:0: [sda] Write Protect is off > > [1.923346] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 > > [1.923462] sd 0:0:0:0: [sda] Write cache: enabled, read cache: > enabled, > > doesn't support DPO or FUA > > [2.035151] sda: sda1 sda2 sda3 > > [2.035429] sd 0:0:0:0: [sda] Attached SCSI disk > > [ 27.766377] EXT4-fs (sda2): mounted filesystem with ordered data mode. > > Opts: (null) > > [19434.731622] sd 0:0:0:0: [sda] Synchronizing SCSI cache > > [19434.903269] sd 0:0:0:0: [sda] Stopping disk > > [19435.577907] sd 0:0:0:0: [sda] Starting disk > > > > > > > > > > On Sat, Dec 29, 2018 at 11:48 PM Anderson, Charles R > wrote: > > > > > No it certainly is not the case that everyone using Fedora 28 has > > > problems with external drives. Was your system upgraded to Fedora 28 > > > from an earlier Fedora version, or was it installed fresh? I ask > > > because I've never had these issues, but I always install fresh rather > > > than do upgrades. > > > > > > /etc/fstab is a file that contains the listing of each filesystem on > > > each device. If you open a command line Terminal and type: > > > > > > cat /etc/fstab > > > > > > you can see what yours has in it. However, I don't think this is > > > related your problem--but we can return to this possibility later > > > after checking a few things. > > > > > > The URL you posted refers to external hard disks or flash drives, not > > > CD/DVD drives. Modern Fedora systems do not have removable media > > > devices listed in /etc/fstab. Instead, they are mounted by udev > > > automatically when the device is connected (and media is inserted). > > > This is the udev configuration file that controls this process for > > > CD/DVD drives: > > > > > > cat /usr/lib/udev/rules.d/60-cdrom_id.rules > > > > > > But this is informational if you wanted to know how this stuff is > > > supposed to work under the hood--you shouldn't need to edit anything > > > there. > > > > > > After you plug in the USB, does the USB device show up in "lsusb"? > > > Open a terminal and run these two commands: > > > > > > lsusb > > > > > > dmesg | grep sd > > > > > > and paste the output in an email reply. > > > > > > On Sat, Dec 29, 2018 at 10:12:22PM -0500, Nancy Allison wrote: > > > > Thank you, Dan. > > > > > > > > You've provided some details that I can follow, but I am not well > enough > > > > grounded to know how I would use them. (For example, I have no idea > where > > > > fstab lives or how I get to it.) If I can find someone to help me out > > > > painstakingly, with a generous donation of their time and effort, I > > > (they, > > > > really) can undoubtedly fix the problem. I may wait until the next > > > > InstallFest for help. > > > > >
Re: [Discuss] Fedora 28 Doesn't See External DVD Drive on USB Port
FWIW, on my system the USB CD player is not "seen" until I put a disc in the drive. - Steve On Sun, Dec 30, 2018 at 11:02 PM wrote: > > Message: 3 > Date: Sun, 30 Dec 2018 18:44:47 -0500 > From: Nancy Allison > To: "Anderson, Charles R" > Cc: "discuss@blu.org" > Subject: Re: [Discuss] Fedora 28 Doesn't See External DVD Drive on USB > Port > Message-ID: > < > capnb49hhfqez1yhhvrtmbqucgqtu1xrfnjhs+-s+mft-a8e...@mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > Hello, all. > > Charles, Fedora 28 was installed fresh; Ubuntu had been on the system > previously. > > I ran the lsusb command first before connecting the DVD drive and again > after. The list of devices did not change. > > Here is the output of the two commands: > > [theauthor@new-host-2 ~]$ lsusb > Bus 001 Device 002: ID 8087:8001 Intel Corp. > Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub > Bus 002 Device 003: ID 13d3:5652 IMC Networks > Bus 002 Device 002: ID 8087:07dc Intel Corp. > Bus 002 Device 006: ID 04f9:0062 Brother Industries, Ltd > Bus 002 Device 064: ID 046d:c52b Logitech, Inc. Unifying Receiver > Bus 002 Device 063: ID 1a40:0101 Terminus Technology Inc. Hub > Bus 002 Device 005: ID 0409:0058 NEC Corp. HighSpeed Hub > Bus 002 Device 004: ID 0424:2507 Standard Microsystems Corp. hub > Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > [theauthor@new-host-2 ~]$ dmesg | grep sd > [1.585719] ahci :00:1f.2: flags: 64bit ncq pm led clo only pio slum > part deso sadm sds apst > [1.923206] sd 0:0:0:0: Attached scsi generic sg0 type 0 > [1.923302] sd 0:0:0:0: [sda] 1465149168 512-byte logical blocks: (750 > GB/699 GiB) > [1.923341] sd 0:0:0:0: [sda] Write Protect is off > [1.923346] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 > [1.923462] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, > doesn't support DPO or FUA > [2.035151] sda: sda1 sda2 sda3 > [2.035429] sd 0:0:0:0: [sda] Attached SCSI disk > [ 27.766377] EXT4-fs (sda2): mounted filesystem with ordered data mode. > Opts: (null) > [19434.731622] sd 0:0:0:0: [sda] Synchronizing SCSI cache > [19434.903269] sd 0:0:0:0: [sda] Stopping disk > [19435.577907] sd 0:0:0:0: [sda] Starting disk > > > > > > ___ Discuss mailing list Discuss@blu.org http://lists.blu.org/mailman/listinfo/discuss
Re: [Discuss] Fedora 28 Doesn't See External DVD Drive on USB Port
Ok, so the kernel is not seeing the USB device. Does the drive and USB cable work on another computer? Does it work on the same computer with a different OS? Does the DVD drive have a separate power cord and are you plugging that in, or are you relying on USB to power the drive directly? On Sun, Dec 30, 2018 at 06:44:47PM -0500, Nancy Allison wrote: > Hello, all. > > Charles, Fedora 28 was installed fresh; Ubuntu had been on the system > previously. > > I ran the lsusb command first before connecting the DVD drive and again > after. The list of devices did not change. > > Here is the output of the two commands: > > [theauthor@new-host-2 ~]$ lsusb > Bus 001 Device 002: ID 8087:8001 Intel Corp. > Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub > Bus 002 Device 003: ID 13d3:5652 IMC Networks > Bus 002 Device 002: ID 8087:07dc Intel Corp. > Bus 002 Device 006: ID 04f9:0062 Brother Industries, Ltd > Bus 002 Device 064: ID 046d:c52b Logitech, Inc. Unifying Receiver > Bus 002 Device 063: ID 1a40:0101 Terminus Technology Inc. Hub > Bus 002 Device 005: ID 0409:0058 NEC Corp. HighSpeed Hub > Bus 002 Device 004: ID 0424:2507 Standard Microsystems Corp. hub > Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > [theauthor@new-host-2 ~]$ dmesg | grep sd > [1.585719] ahci :00:1f.2: flags: 64bit ncq pm led clo only pio slum > part deso sadm sds apst > [1.923206] sd 0:0:0:0: Attached scsi generic sg0 type 0 > [1.923302] sd 0:0:0:0: [sda] 1465149168 512-byte logical blocks: (750 > GB/699 GiB) > [1.923341] sd 0:0:0:0: [sda] Write Protect is off > [1.923346] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 > [1.923462] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, > doesn't support DPO or FUA > [2.035151] sda: sda1 sda2 sda3 > [2.035429] sd 0:0:0:0: [sda] Attached SCSI disk > [ 27.766377] EXT4-fs (sda2): mounted filesystem with ordered data mode. > Opts: (null) > [19434.731622] sd 0:0:0:0: [sda] Synchronizing SCSI cache > [19434.903269] sd 0:0:0:0: [sda] Stopping disk > [19435.577907] sd 0:0:0:0: [sda] Starting disk > > > > > On Sat, Dec 29, 2018 at 11:48 PM Anderson, Charles R wrote: > > > No it certainly is not the case that everyone using Fedora 28 has > > problems with external drives. Was your system upgraded to Fedora 28 > > from an earlier Fedora version, or was it installed fresh? I ask > > because I've never had these issues, but I always install fresh rather > > than do upgrades. > > > > /etc/fstab is a file that contains the listing of each filesystem on > > each device. If you open a command line Terminal and type: > > > > cat /etc/fstab > > > > you can see what yours has in it. However, I don't think this is > > related your problem--but we can return to this possibility later > > after checking a few things. > > > > The URL you posted refers to external hard disks or flash drives, not > > CD/DVD drives. Modern Fedora systems do not have removable media > > devices listed in /etc/fstab. Instead, they are mounted by udev > > automatically when the device is connected (and media is inserted). > > This is the udev configuration file that controls this process for > > CD/DVD drives: > > > > cat /usr/lib/udev/rules.d/60-cdrom_id.rules > > > > But this is informational if you wanted to know how this stuff is > > supposed to work under the hood--you shouldn't need to edit anything > > there. > > > > After you plug in the USB, does the USB device show up in "lsusb"? > > Open a terminal and run these two commands: > > > > lsusb > > > > dmesg | grep sd > > > > and paste the output in an email reply. > > > > On Sat, Dec 29, 2018 at 10:12:22PM -0500, Nancy Allison wrote: > > > Thank you, Dan. > > > > > > You've provided some details that I can follow, but I am not well enough > > > grounded to know how I would use them. (For example, I have no idea where > > > fstab lives or how I get to it.) If I can find someone to help me out > > > painstakingly, with a generous donation of their time and effort, I > > (they, > > > really) can undoubtedly fix the problem. I may wait until the next > > > InstallFest for help. > > > > > > But this leaves me wondering, can it really be that everyone using Fedora > > > 28 struggles along with this same problem that obviously affects plenty > > of > > > people? CDs and DVDs are not used as much as they once were, but they are > > > still in use. If you google "fedora 28 doesn't recognize external dvd > > > drive" you get people struggling with this back in 2010 and 2011. Is this > > > what Fedora is like -- everyone struggles with problems individually? And > > > you really have to have a lot of technical knowledge to deal with these > > > problems as they come up. Maybe Fedora is just too tecchie for me, but it > > > seems as if Ubuntu was, too, when I used it before Fedora. Maybe Red Hat > > is > > > easier for a non-technical
Re: [Discuss] Fedora 28 Doesn't See External DVD Drive on USB Port
Hello, all. Charles, Fedora 28 was installed fresh; Ubuntu had been on the system previously. I ran the lsusb command first before connecting the DVD drive and again after. The list of devices did not change. Here is the output of the two commands: [theauthor@new-host-2 ~]$ lsusb Bus 001 Device 002: ID 8087:8001 Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 002 Device 003: ID 13d3:5652 IMC Networks Bus 002 Device 002: ID 8087:07dc Intel Corp. Bus 002 Device 006: ID 04f9:0062 Brother Industries, Ltd Bus 002 Device 064: ID 046d:c52b Logitech, Inc. Unifying Receiver Bus 002 Device 063: ID 1a40:0101 Terminus Technology Inc. Hub Bus 002 Device 005: ID 0409:0058 NEC Corp. HighSpeed Hub Bus 002 Device 004: ID 0424:2507 Standard Microsystems Corp. hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub [theauthor@new-host-2 ~]$ dmesg | grep sd [1.585719] ahci :00:1f.2: flags: 64bit ncq pm led clo only pio slum part deso sadm sds apst [1.923206] sd 0:0:0:0: Attached scsi generic sg0 type 0 [1.923302] sd 0:0:0:0: [sda] 1465149168 512-byte logical blocks: (750 GB/699 GiB) [1.923341] sd 0:0:0:0: [sda] Write Protect is off [1.923346] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 [1.923462] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [2.035151] sda: sda1 sda2 sda3 [2.035429] sd 0:0:0:0: [sda] Attached SCSI disk [ 27.766377] EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: (null) [19434.731622] sd 0:0:0:0: [sda] Synchronizing SCSI cache [19434.903269] sd 0:0:0:0: [sda] Stopping disk [19435.577907] sd 0:0:0:0: [sda] Starting disk On Sat, Dec 29, 2018 at 11:48 PM Anderson, Charles R wrote: > No it certainly is not the case that everyone using Fedora 28 has > problems with external drives. Was your system upgraded to Fedora 28 > from an earlier Fedora version, or was it installed fresh? I ask > because I've never had these issues, but I always install fresh rather > than do upgrades. > > /etc/fstab is a file that contains the listing of each filesystem on > each device. If you open a command line Terminal and type: > > cat /etc/fstab > > you can see what yours has in it. However, I don't think this is > related your problem--but we can return to this possibility later > after checking a few things. > > The URL you posted refers to external hard disks or flash drives, not > CD/DVD drives. Modern Fedora systems do not have removable media > devices listed in /etc/fstab. Instead, they are mounted by udev > automatically when the device is connected (and media is inserted). > This is the udev configuration file that controls this process for > CD/DVD drives: > > cat /usr/lib/udev/rules.d/60-cdrom_id.rules > > But this is informational if you wanted to know how this stuff is > supposed to work under the hood--you shouldn't need to edit anything > there. > > After you plug in the USB, does the USB device show up in "lsusb"? > Open a terminal and run these two commands: > > lsusb > > dmesg | grep sd > > and paste the output in an email reply. > > On Sat, Dec 29, 2018 at 10:12:22PM -0500, Nancy Allison wrote: > > Thank you, Dan. > > > > You've provided some details that I can follow, but I am not well enough > > grounded to know how I would use them. (For example, I have no idea where > > fstab lives or how I get to it.) If I can find someone to help me out > > painstakingly, with a generous donation of their time and effort, I > (they, > > really) can undoubtedly fix the problem. I may wait until the next > > InstallFest for help. > > > > But this leaves me wondering, can it really be that everyone using Fedora > > 28 struggles along with this same problem that obviously affects plenty > of > > people? CDs and DVDs are not used as much as they once were, but they are > > still in use. If you google "fedora 28 doesn't recognize external dvd > > drive" you get people struggling with this back in 2010 and 2011. Is this > > what Fedora is like -- everyone struggles with problems individually? And > > you really have to have a lot of technical knowledge to deal with these > > problems as they come up. Maybe Fedora is just too tecchie for me, but it > > seems as if Ubuntu was, too, when I used it before Fedora. Maybe Red Hat > is > > easier for a non-technical person to handle? > > > > Just thinking out loud. Thanks for the additional info. > > > > On Sat, Dec 29, 2018 at 7:12 PM Dan Ritter wrote: > > > > > Nancy Allison wrote: > > > > Hi, all. > > > > > > > > When I plug in my external disk drive into my Fedora 28 machine, it > does > > > > not show up in Nautilus. > > > > > > > > I go looking online, and, sure enough, this problem has occurred for > > > plenty > > > > of people for 5+ years over many releases of Fedora. > > > > > > > > I find a discussion in which someone evidently solved the problem. > Here > > > is >
Re: [Discuss] Fedora 28 Doesn't See External DVD Drive on USB Port
I'll also point out that CD/DVD devices are usually named /dev/sr0 /dev/sr1 etc. where the "sr" stands for "SCSI ROM" and the numbers 0, 1, etc. are not partitions, but actual different physical drives. Older systems may use /dev/scd0, /dev/scd1, etc. So in my request for output, you should also post this: dmesg | grep 'sr[0-9]' On Sat, Dec 29, 2018 at 11:51:24PM -0500, David Kramer wrote: > I doubt the solution to that other person's problem is the same one you > are having, but it's possible. Let me explain it in more detail, > because it actually has nothing to do with external DVD drives > specifically, which is muddying the waters. > > These days, most storage devices emulate the old SCSI (Small Computer > System Interface) standard at the API level. That is, the hardware is > different, but the commands that an OS or BIOS would send to an old SCSI > drive. That's why the devices are named /dev/sda, dev/sdb, etc. The > devices are named in order as they are discovered, so the main drive is > /dev/sda, and if you have a second disk it would be /dev/sdb. > > Partitions are named by appending the partition number to the device > they are on. The first partition on the first device is /dev/sda1, and > the second partition would be /dev/sda2. > > Let's say you plug in a thumb drive after that. That would be the third > disk, so it would be /dev/sdc. If you then plugged in your external > DVD drive, it would probably be /dev/sdd. That all works pretty well. > > Here's the problem: Let's say you have some configuration file, whatever > it is, that refers to a disk, because you have a second hard drive in > your computer. let's call it /dev/sdb. Now let's say you plug in your > external DVD player and it comes up as /dev/sdc, and all is right with > the world. > > BUT: If you remove that second drive from your computer and there is no > longer a /dev/sdb, and you do not update that configuration file, then > when you add your external DVD player, it will come up as /dev/sdb > instead. That configuration file is telling your computer that /dev/sdb > is something else. And there we have the problem. > > Now this file in particular, /etc/fstab (and you need to use sudo to > edit it) tells the computer what each drive is for and how to mount it > and to where. It is a BAD file to have incorrect information in for > that reason, and that is the problem described in your mail. I doubt > that's your problem, but if you send us the contents of that file, we > may be able to confirm. > > Some good news: There IS a better way. Partitions can also be identified > by user-specified labels, and that eliminates the whole > who-got-connected-first problem. It also lets you set up rules, like > automatically mounting THIS particular external USB device, but not this > other one. > > Hope that helps. > > > On 12/29/18 10:12 PM, Nancy Allison wrote: > > Thank you, Dan. > > > > You've provided some details that I can follow, but I am not well enough > > grounded to know how I would use them. (For example, I have no idea where > > fstab lives or how I get to it.) If I can find someone to help me out > > painstakingly, with a generous donation of their time and effort, I (they, > > really) can undoubtedly fix the problem. I may wait until the next > > InstallFest for help. > > > > But this leaves me wondering, can it really be that everyone using Fedora > > 28 struggles along with this same problem that obviously affects plenty of > > people? CDs and DVDs are not used as much as they once were, but they are > > still in use. If you google "fedora 28 doesn't recognize external dvd > > drive" you get people struggling with this back in 2010 and 2011. Is this > > what Fedora is like -- everyone struggles with problems individually? And > > you really have to have a lot of technical knowledge to deal with these > > problems as they come up. Maybe Fedora is just too tecchie for me, but it > > seems as if Ubuntu was, too, when I used it before Fedora. Maybe Red Hat is > > easier for a non-technical person to handle? > > > > Just thinking out loud. Thanks for the additional info. > > > > On Sat, Dec 29, 2018 at 7:12 PM Dan Ritter wrote: > > > >> Nancy Allison wrote: > >>> Hi, all. > >>> > >>> When I plug in my external disk drive into my Fedora 28 machine, it does > >>> not show up in Nautilus. > >>> > >>> I go looking online, and, sure enough, this problem has occurred for > >> plenty > >>> of people for 5+ years over many releases of Fedora. > >>> > >>> I find a discussion in which someone evidently solved the problem. Here > >> is > >>> what the person reported: > >>> > >>> "NVM - found the cause. Old entry in fstab for a second swap not present > >> on > >>> sdb1 and first USB disks being assigned sdb. Cleaned that up and now all > >>> drives plugging correctly. > >>> Willtech ( Sep 23 '18 )" > >>> > >>> How do I apply this information? Where is fstab? When does a first swap > >>> occur? When does a
Re: [Discuss] Fedora 28 Doesn't See External DVD Drive on USB Port
I doubt the solution to that other person's problem is the same one you are having, but it's possible. Let me explain it in more detail, because it actually has nothing to do with external DVD drives specifically, which is muddying the waters. These days, most storage devices emulate the old SCSI (Small Computer System Interface) standard at the API level. That is, the hardware is different, but the commands that an OS or BIOS would send to an old SCSI drive. That's why the devices are named /dev/sda, dev/sdb, etc. The devices are named in order as they are discovered, so the main drive is /dev/sda, and if you have a second disk it would be /dev/sdb. Partitions are named by appending the partition number to the device they are on. The first partition on the first device is /dev/sda1, and the second partition would be /dev/sda2. Let's say you plug in a thumb drive after that. That would be the third disk, so it would be /dev/sdc. If you then plugged in your external DVD drive, it would probably be /dev/sdd. That all works pretty well. Here's the problem: Let's say you have some configuration file, whatever it is, that refers to a disk, because you have a second hard drive in your computer. let's call it /dev/sdb. Now let's say you plug in your external DVD player and it comes up as /dev/sdc, and all is right with the world. BUT: If you remove that second drive from your computer and there is no longer a /dev/sdb, and you do not update that configuration file, then when you add your external DVD player, it will come up as /dev/sdb instead. That configuration file is telling your computer that /dev/sdb is something else. And there we have the problem. Now this file in particular, /etc/fstab (and you need to use sudo to edit it) tells the computer what each drive is for and how to mount it and to where. It is a BAD file to have incorrect information in for that reason, and that is the problem described in your mail. I doubt that's your problem, but if you send us the contents of that file, we may be able to confirm. Some good news: There IS a better way. Partitions can also be identified by user-specified labels, and that eliminates the whole who-got-connected-first problem. It also lets you set up rules, like automatically mounting THIS particular external USB device, but not this other one. Hope that helps. On 12/29/18 10:12 PM, Nancy Allison wrote: > Thank you, Dan. > > You've provided some details that I can follow, but I am not well enough > grounded to know how I would use them. (For example, I have no idea where > fstab lives or how I get to it.) If I can find someone to help me out > painstakingly, with a generous donation of their time and effort, I (they, > really) can undoubtedly fix the problem. I may wait until the next > InstallFest for help. > > But this leaves me wondering, can it really be that everyone using Fedora > 28 struggles along with this same problem that obviously affects plenty of > people? CDs and DVDs are not used as much as they once were, but they are > still in use. If you google "fedora 28 doesn't recognize external dvd > drive" you get people struggling with this back in 2010 and 2011. Is this > what Fedora is like -- everyone struggles with problems individually? And > you really have to have a lot of technical knowledge to deal with these > problems as they come up. Maybe Fedora is just too tecchie for me, but it > seems as if Ubuntu was, too, when I used it before Fedora. Maybe Red Hat is > easier for a non-technical person to handle? > > Just thinking out loud. Thanks for the additional info. > > On Sat, Dec 29, 2018 at 7:12 PM Dan Ritter wrote: > >> Nancy Allison wrote: >>> Hi, all. >>> >>> When I plug in my external disk drive into my Fedora 28 machine, it does >>> not show up in Nautilus. >>> >>> I go looking online, and, sure enough, this problem has occurred for >> plenty >>> of people for 5+ years over many releases of Fedora. >>> >>> I find a discussion in which someone evidently solved the problem. Here >> is >>> what the person reported: >>> >>> "NVM - found the cause. Old entry in fstab for a second swap not present >> on >>> sdb1 and first USB disks being assigned sdb. Cleaned that up and now all >>> drives plugging correctly. >>> Willtech ( Sep 23 '18 )" >>> >>> How do I apply this information? Where is fstab? When does a first swap >>> occur? When does a second swap occur? What does it mean to be assigned >> sdb? >> >> /etc/fstab consolidates mounting information. >> >> Each active line defines: >> >> >> >> For example: >> >> /dev/scd0 /media/cdrom0 ISO9660 ro 1 1 >> >> device/partition name, then where you want it mounted, then the >> type of filesystem. >> >> If you have a single disk called /dev/sda, for instance, you >> might see your external CD show up as /dev/sdb. If there's >> already a /dev/sdb listed in the file, that will conflict. >> >> Hope that helps. >> >> -dsr- >> >
Re: [Discuss] Fedora 28 Doesn't See External DVD Drive on USB Port
No it certainly is not the case that everyone using Fedora 28 has problems with external drives. Was your system upgraded to Fedora 28 from an earlier Fedora version, or was it installed fresh? I ask because I've never had these issues, but I always install fresh rather than do upgrades. /etc/fstab is a file that contains the listing of each filesystem on each device. If you open a command line Terminal and type: cat /etc/fstab you can see what yours has in it. However, I don't think this is related your problem--but we can return to this possibility later after checking a few things. The URL you posted refers to external hard disks or flash drives, not CD/DVD drives. Modern Fedora systems do not have removable media devices listed in /etc/fstab. Instead, they are mounted by udev automatically when the device is connected (and media is inserted). This is the udev configuration file that controls this process for CD/DVD drives: cat /usr/lib/udev/rules.d/60-cdrom_id.rules But this is informational if you wanted to know how this stuff is supposed to work under the hood--you shouldn't need to edit anything there. After you plug in the USB, does the USB device show up in "lsusb"? Open a terminal and run these two commands: lsusb dmesg | grep sd and paste the output in an email reply. On Sat, Dec 29, 2018 at 10:12:22PM -0500, Nancy Allison wrote: > Thank you, Dan. > > You've provided some details that I can follow, but I am not well enough > grounded to know how I would use them. (For example, I have no idea where > fstab lives or how I get to it.) If I can find someone to help me out > painstakingly, with a generous donation of their time and effort, I (they, > really) can undoubtedly fix the problem. I may wait until the next > InstallFest for help. > > But this leaves me wondering, can it really be that everyone using Fedora > 28 struggles along with this same problem that obviously affects plenty of > people? CDs and DVDs are not used as much as they once were, but they are > still in use. If you google "fedora 28 doesn't recognize external dvd > drive" you get people struggling with this back in 2010 and 2011. Is this > what Fedora is like -- everyone struggles with problems individually? And > you really have to have a lot of technical knowledge to deal with these > problems as they come up. Maybe Fedora is just too tecchie for me, but it > seems as if Ubuntu was, too, when I used it before Fedora. Maybe Red Hat is > easier for a non-technical person to handle? > > Just thinking out loud. Thanks for the additional info. > > On Sat, Dec 29, 2018 at 7:12 PM Dan Ritter wrote: > > > Nancy Allison wrote: > > > Hi, all. > > > > > > When I plug in my external disk drive into my Fedora 28 machine, it does > > > not show up in Nautilus. > > > > > > I go looking online, and, sure enough, this problem has occurred for > > plenty > > > of people for 5+ years over many releases of Fedora. > > > > > > I find a discussion in which someone evidently solved the problem. Here > > is > > > what the person reported: > > > > > > "NVM - found the cause. Old entry in fstab for a second swap not present > > on > > > sdb1 and first USB disks being assigned sdb. Cleaned that up and now all > > > drives plugging correctly. > > > Willtech ( Sep 23 '18 )" > > > > > > How do I apply this information? Where is fstab? When does a first swap > > > occur? When does a second swap occur? What does it mean to be assigned > > sdb? > > > > /etc/fstab consolidates mounting information. > > > > Each active line defines: > > > > > > > > For example: > > > > /dev/scd0 /media/cdrom0 ISO9660 ro 1 1 > > > > device/partition name, then where you want it mounted, then the > > type of filesystem. > > > > If you have a single disk called /dev/sda, for instance, you > > might see your external CD show up as /dev/sdb. If there's > > already a /dev/sdb listed in the file, that will conflict. > > > > Hope that helps. ___ Discuss mailing list Discuss@blu.org http://lists.blu.org/mailman/listinfo/discuss
Re: [Discuss] Fedora 28 Doesn't See External DVD Drive on USB Port
Thank you, Dan. You've provided some details that I can follow, but I am not well enough grounded to know how I would use them. (For example, I have no idea where fstab lives or how I get to it.) If I can find someone to help me out painstakingly, with a generous donation of their time and effort, I (they, really) can undoubtedly fix the problem. I may wait until the next InstallFest for help. But this leaves me wondering, can it really be that everyone using Fedora 28 struggles along with this same problem that obviously affects plenty of people? CDs and DVDs are not used as much as they once were, but they are still in use. If you google "fedora 28 doesn't recognize external dvd drive" you get people struggling with this back in 2010 and 2011. Is this what Fedora is like -- everyone struggles with problems individually? And you really have to have a lot of technical knowledge to deal with these problems as they come up. Maybe Fedora is just too tecchie for me, but it seems as if Ubuntu was, too, when I used it before Fedora. Maybe Red Hat is easier for a non-technical person to handle? Just thinking out loud. Thanks for the additional info. On Sat, Dec 29, 2018 at 7:12 PM Dan Ritter wrote: > Nancy Allison wrote: > > Hi, all. > > > > When I plug in my external disk drive into my Fedora 28 machine, it does > > not show up in Nautilus. > > > > I go looking online, and, sure enough, this problem has occurred for > plenty > > of people for 5+ years over many releases of Fedora. > > > > I find a discussion in which someone evidently solved the problem. Here > is > > what the person reported: > > > > "NVM - found the cause. Old entry in fstab for a second swap not present > on > > sdb1 and first USB disks being assigned sdb. Cleaned that up and now all > > drives plugging correctly. > > Willtech ( Sep 23 '18 )" > > > > How do I apply this information? Where is fstab? When does a first swap > > occur? When does a second swap occur? What does it mean to be assigned > sdb? > > /etc/fstab consolidates mounting information. > > Each active line defines: > > > > For example: > > /dev/scd0 /media/cdrom0 ISO9660 ro 1 1 > > device/partition name, then where you want it mounted, then the > type of filesystem. > > If you have a single disk called /dev/sda, for instance, you > might see your external CD show up as /dev/sdb. If there's > already a /dev/sdb listed in the file, that will conflict. > > Hope that helps. > > -dsr- > ___ Discuss mailing list Discuss@blu.org http://lists.blu.org/mailman/listinfo/discuss
Re: [Discuss] Fedora 28 Doesn't See External DVD Drive on USB Port
Nancy Allison wrote: > Hi, all. > > When I plug in my external disk drive into my Fedora 28 machine, it does > not show up in Nautilus. > > I go looking online, and, sure enough, this problem has occurred for plenty > of people for 5+ years over many releases of Fedora. > > I find a discussion in which someone evidently solved the problem. Here is > what the person reported: > > "NVM - found the cause. Old entry in fstab for a second swap not present on > sdb1 and first USB disks being assigned sdb. Cleaned that up and now all > drives plugging correctly. > Willtech ( Sep 23 '18 )" > > How do I apply this information? Where is fstab? When does a first swap > occur? When does a second swap occur? What does it mean to be assigned sdb? /etc/fstab consolidates mounting information. Each active line defines: For example: /dev/scd0 /media/cdrom0 ISO9660 ro 1 1 device/partition name, then where you want it mounted, then the type of filesystem. If you have a single disk called /dev/sda, for instance, you might see your external CD show up as /dev/sdb. If there's already a /dev/sdb listed in the file, that will conflict. Hope that helps. -dsr- ___ Discuss mailing list Discuss@blu.org http://lists.blu.org/mailman/listinfo/discuss
[Discuss] Fedora 28 Doesn't See External DVD Drive on USB Port
Hi, all. When I plug in my external disk drive into my Fedora 28 machine, it does not show up in Nautilus. I go looking online, and, sure enough, this problem has occurred for plenty of people for 5+ years over many releases of Fedora. I find a discussion in which someone evidently solved the problem. Here is what the person reported: "NVM - found the cause. Old entry in fstab for a second swap not present on sdb1 and first USB disks being assigned sdb. Cleaned that up and now all drives plugging correctly. Willtech ( Sep 23 '18 )" How do I apply this information? Where is fstab? When does a first swap occur? When does a second swap occur? What does it mean to be assigned sdb? Here is the URL to the entire discussion: https://ask.fedoraproject.org/en/question/126908/fedora-28laptop-fails-to-mount-usb-disks/ All suggestions warmly welcomed. I sure would like to see that DVD drive show up. --Nancy ___ Discuss mailing list Discuss@blu.org http://lists.blu.org/mailman/listinfo/discuss
