Hidden Long Filenames and mount_cd9660
Hiya misc@, Upfront: if you have something useful to say, CC me, please. I haven't been on this list in a while, managing to solve my own shit before having to mail the hivemind, but today I am at a loss. I have some old DVD backups from the days when backing up to DVD sort of made sense, and now I'm trying to extricate them from their prison. Some have broken down and are full of I/O errors or won't mount at all, but others work fine. The trouble I'm having is that, in those that will mount, some (but only -some-!) show up with 8.3 (aka short aka DOS) filenames. I've booted my server into Linux and confirmed that, all else being equal, Linux gives long file names and OpenBSD doesn't for these disks, so *the metadata is* there and OpenBSD is doing it wrong. The head-scratching thing is that for some disks OpenBSD works like you'd expect, it's only some disks which teleport it to the stone age. I expect there's something weird about the metadata (having or not having proper Joliet or Rock Ridge attributes, I guess?), but I'm damned if I know what they are (I made these disks on Windows, with Nero probably, before I was on the path of enlightenment). I don't really care the cause, I just want my data: is there a way to -force- OpenBSD to pay attention to the long file names? mount_cd9660's -e, -g, -j and -R, much like the goggles, do nothing. Halpp! Here's what cd-info(1) (for the archives: this is from package libcdio) has to say about a DVD that OpenBSD shows LFNs for: ~$ cd-info --dvd cd-info version 0.80 i386-unknown-openbsd4.9 Copyright (c) 2003, 2004, 2005, 2007, 2008 R. Bernstein This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. CD location : /dev/rcd0c CD driver name: OpenBSD access mode: READ_CD Vendor : TSSTcorp Model : CD/DVDW TS-H652D Revision: GA01 Hardware : CD-ROM or DVD Can eject : Yes Can close tray: Yes Can disable manual eject : Yes Can select juke-box disc : No Can set drive speed : No Can read multiple sessions (e.g. PhotoCD) : Yes Can hard reset device : Yes Reading Can read Mode 2 Form 1 : Yes Can read Mode 2 Form 2 : Yes Can read (S)VCD (i.e. Mode 2 Form 1/2) : Yes Can read C2 Errors : Yes Can read IRSC : Yes Can read Media Channel Number (or UPC) : Yes Can play audio : Yes Can read CD-DA : Yes Can read CD-R : Yes Can read CD-RW : Yes Can read DVD-ROM: Yes Writing Can write CD-RW : Yes Can write DVD-R : Yes Can write DVD-RAM : Yes Can write DVD-RW: No Can write DVD+RW: No __ Disc mode is listed as: DVD-R CD-ROM Track List (1 - 1) #: MSF LSNType Green? Copy? 1: 00:02:00 00 data false no ++ WARN: number of minutes (501) truncated to 99. 170: 99:24:74 447224 leadout (1003 MB raw, 873 MB formatted) __ CD An alysis Report CD-ROM with ISO 9660 filesystem and joliet extension level 3 ISO 9660: 2256224 blocks, label `GOSHA_DOCUMENTS ' Application: NERO BURNING ROM Preparer : Publisher : System : Volume : GOSHA_DOCUMENTS Volume Set : ~$ and one that OpenBSD shows SFNs for: ~$ cd-info --dvd [snip common drive info] Disc mode is listed as: DVD-R CD-ROM Track List (1 - 1) #: MSF LSNType Green? Copy? 1: 00:02:00 00 data false no ++ WARN: number of minutes (507) truncated to 99. 170: 99:16:26 446576 leadout (1001 MB raw, 872 MB formatted) __ CD Analysis Report ISO 9660: 2279017 blocks, label `G Save B 6 ' Application: EASY CD CREATOR 6.0 (171) COPYRIGHT (C) 1999-2003 ROXIO, INC. Preparer : Publisher : System : Volume : G Save B 6 Volume Set : UDF: version 0.00 and another: Disc mode is listed as: DVD-R CD-ROM Track List (1 - 1) #: MSF LSNType Green? Copy? 1: 00:02:00 00 data false no ++ WARN: number of minutes (505) truncated to 99. 170: 99:57:63 449688 leadout (1008 MB raw, 878 MB formatted) __ CD Analysis Report ISO 9660: 2269454 blocks, label `G Save B 7 ' Application: EASY CD CREATOR 6.0 (171) COPYRIGHT (C) 1999-2003 ROXIO, INC. Preparer : Publisher : System : Volume : G Save B 7 Volume Set : UDF: version 0.00 So, obviously, the clue is that Roxio obviously
Re: Hidden Long Filenames and mount_cd9660
Why not find a Windows box to dump the data to a Linux server? Problem solved. On Feb 19, 2012 8:54 AM, Nick Guenther n...@kousu.ca wrote: Hiya misc@, Upfront: if you have something useful to say, CC me, please. I haven't been on this list in a while, managing to solve my own shit before having to mail the hivemind, but today I am at a loss. I have some old DVD backups from the days when backing up to DVD sort of made sense, and now I'm trying to extricate them from their prison. Some have broken down and are full of I/O errors or won't mount at all, but others work fine. The trouble I'm having is that, in those that will mount, some (but only -some-!) show up with 8.3 (aka short aka DOS) filenames. I've booted my server into Linux and confirmed that, all else being equal, Linux gives long file names and OpenBSD doesn't for these disks, so *the metadata is* there and OpenBSD is doing it wrong. The head-scratching thing is that for some disks OpenBSD works like you'd expect, it's only some disks which teleport it to the stone age. I expect there's something weird about the metadata (having or not having proper Joliet or Rock Ridge attributes, I guess?), but I'm damned if I know what they are (I made these disks on Windows, with Nero probably, before I was on the path of enlightenment). I don't really care the cause, I just want my data: is there a way to -force- OpenBSD to pay attention to the long file names? mount_cd9660's -e, -g, -j and -R, much like the goggles, do nothing. Halpp! Here's what cd-info(1) (for the archives: this is from package libcdio) has to say about a DVD that OpenBSD shows LFNs for: ~$ cd-info --dvd cd-info version 0.80 i386-unknown-openbsd4.9 Copyright (c) 2003, 2004, 2005, 2007, 2008 R. Bernstein This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. CD location : /dev/rcd0c CD driver name: OpenBSD access mode: READ_CD Vendor : TSSTcorp Model : CD/DVDW TS-H652D Revision: GA01 Hardware : CD-ROM or DVD Can eject : Yes Can close tray: Yes Can disable manual eject : Yes Can select juke-box disc : No Can set drive speed : No Can read multiple sessions (e.g. PhotoCD) : Yes Can hard reset device : Yes Reading Can read Mode 2 Form 1 : Yes Can read Mode 2 Form 2 : Yes Can read (S)VCD (i.e. Mode 2 Form 1/2) : Yes Can read C2 Errors : Yes Can read IRSC : Yes Can read Media Channel Number (or UPC) : Yes Can play audio : Yes Can read CD-DA : Yes Can read CD-R : Yes Can read CD-RW : Yes Can read DVD-ROM: Yes Writing Can write CD-RW : Yes Can write DVD-R : Yes Can write DVD-RAM : Yes Can write DVD-RW: No Can write DVD+RW: No __** Disc mode is listed as: DVD-R CD-ROM Track List (1 - 1) #: MSF LSNType Green? Copy? 1: 00:02:00 00 data false no ++ WARN: number of minutes (501) truncated to 99. 170: 99:24:74 447224 leadout (1003 MB raw, 873 MB formatted) __** CD An alysis Report CD-ROM with ISO 9660 filesystem and joliet extension level 3 ISO 9660: 2256224 blocks, label `GOSHA_DOCUMENTS ' Application: NERO BURNING ROM Preparer : Publisher : System : Volume : GOSHA_DOCUMENTS Volume Set : ~$ and one that OpenBSD shows SFNs for: ~$ cd-info --dvd [snip common drive info] Disc mode is listed as: DVD-R CD-ROM Track List (1 - 1) #: MSF LSNType Green? Copy? 1: 00:02:00 00 data false no ++ WARN: number of minutes (507) truncated to 99. 170: 99:16:26 446576 leadout (1001 MB raw, 872 MB formatted) __** CD Analysis Report ISO 9660: 2279017 blocks, label `G Save B 6 ' Application: EASY CD CREATOR 6.0 (171) COPYRIGHT (C) 1999-2003 ROXIO, INC. Preparer : Publisher : System : Volume : G Save B 6 Volume Set : UDF: version 0.00 and another: Disc mode is listed as: DVD-R CD-ROM Track List (1 - 1) #: MSF LSNType Green? Copy? 1: 00:02:00 00 data false no ++ WARN: number of minutes (505) truncated to 99. 170: 99:57:63 449688 leadout (1008 MB raw, 878 MB formatted) __** CD Analysis Report ISO 9660: 2269454 blocks, label `G Save B 7 ' Application:
Re: Hidden Long Filenames and mount_cd9660
Nick Guenther wrote: Here's what cd-info(1) (for the archives: this is from package libcdio) has to say about a DVD that OpenBSD shows LFNs for: ~$ cd-info --dvd cd-info version 0.80 i386-unknown-openbsd4.9 Copyright (c) 2003, 2004, 2005, 2007, 2008 R. Bernstein This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. CD location : /dev/rcd0c CD driver name: OpenBSD access mode: READ_CD Vendor : TSSTcorp Model : CD/DVDW TS-H652D Revision: GA01 Hardware : CD-ROM or DVD Can eject : Yes Can close tray: Yes Can disable manual eject : Yes Can select juke-box disc : No Can set drive speed : No Can read multiple sessions (e.g. PhotoCD) : Yes Can hard reset device : Yes Reading Can read Mode 2 Form 1 : Yes Can read Mode 2 Form 2 : Yes Can read (S)VCD (i.e. Mode 2 Form 1/2) : Yes Can read C2 Errors : Yes Can read IRSC : Yes Can read Media Channel Number (or UPC) : Yes Can play audio : Yes Can read CD-DA : Yes Can read CD-R : Yes Can read CD-RW : Yes Can read DVD-ROM: Yes Writing Can write CD-RW : Yes Can write DVD-R : Yes Can write DVD-RAM : Yes Can write DVD-RW: No Can write DVD+RW: No __ Disc mode is listed as: DVD-R CD-ROM Track List (1 - 1) #: MSF LSNType Green? Copy? 1: 00:02:00 00 data false no ++ WARN: number of minutes (501) truncated to 99. 170: 99:24:74 447224 leadout (1003 MB raw, 873 MB formatted) __ CD Analysis Report CD-ROM with ISO 9660 filesystem and joliet extension level 3 ISO 9660: 2256224 blocks, label `GOSHA_DOCUMENTS ' Application: NERO BURNING ROM Preparer : Publisher : System : Volume : GOSHA_DOCUMENTS Volume Set : ~$ and one that OpenBSD shows SFNs for: ~$ cd-info --dvd [snip common drive info] Disc mode is listed as: DVD-R CD-ROM Track List (1 - 1) #: MSF LSNType Green? Copy? 1: 00:02:00 00 data false no ++ WARN: number of minutes (507) truncated to 99. 170: 99:16:26 446576 leadout (1001 MB raw, 872 MB formatted) __ CD Analysis Report ISO 9660: 2279017 blocks, label `G Save B 6 ' Application: EASY CD CREATOR 6.0 (171) COPYRIGHT (C) 1999-2003 ROXIO, INC. Preparer : Publisher : System : Volume : G Save B 6 Volume Set : UDF: version 0.00 and another: Disc mode is listed as: DVD-R CD-ROM Track List (1 - 1) #: MSF LSNType Green? Copy? 1: 00:02:00 00 data false no ++ WARN: number of minutes (505) truncated to 99. 170: 99:57:63 449688 leadout (1008 MB raw, 878 MB formatted) __ CD Analysis Report ISO 9660: 2269454 blocks, label `G Save B 7 ' Application: EASY CD CREATOR 6.0 (171) COPYRIGHT (C) 1999-2003 ROXIO, INC. Preparer : Publisher : System : Volume : G Save B 7 Volume Set : UDF: version 0.00 So, obviously, the clue is that Roxio obviously didn't put Joliet data on the discs (grrr), which Nero did on the other one. But nevertheless the long file names *are* there because linux reads them. Is there any way to make OpenBSD find the long names anyway? Thanks to all you lovely misc@ers, -Nick If I'm not mistaken your LFN disc only show ISO9660, the SFN discs have an additional UDF: version 0.00 marker. I've never used it so I don't know if it's the right tool for the job but there is mount_udf(8) on OpenBSD. I'll leave it to you if you want to risk trying it, or wait for more knowledgeable people to chime in.
Re: Hidden Long Filenames and mount_cd9660
On Sun, 19 Feb 2012 09:47:29 -0500, Richard Thornton wrote: Why not find a Windows box to dump the data to a Linux server? Problem solved. Because this isn't the first time I've noticed this, and last night I finally hunted down specs and guessed around enough to figure out what was going on--and also, I refuse to believe that OpenBSD is this retarded. This was one of the first things that bugged me about it, back when I first ever stuck discs into it. Also I have about 100gigs on DVD and I want to minimize the hoops the data has to go through. Also I'd have to beg friends for access to Windows. I thought about this though! My last plan before sleeping last night was to install linux in qemu on the server with sshd running and access to cd0c and dump data that way--the virtual network lag should be far less than real lag, but now thankfully I don't have to because Remco has stumbled into the proper solution. On Sun, 19 Feb 2012 16:41:44 +0100, Remco wrote: Nick Guenther wrote: Here's what cd-info(1) (for the archives: this is from package libcdio) has to say about a DVD that OpenBSD shows LFNs for: ~$ cd-info --dvd [snip] Disc mode is listed as: DVD-R CD-ROM Track List (1 - 1) #: MSF LSNType Green? Copy? 1: 00:02:00 00 data false no ++ WARN: number of minutes (501) truncated to 99. 170: 99:24:74 447224 leadout (1003 MB raw, 873 MB formatted) __ CD Analysis Report CD-ROM with ISO 9660 filesystem and joliet extension level 3 ISO 9660: 2256224 blocks, label `GOSHA_DOCUMENTS ' Application: NERO BURNING ROM Preparer : Publisher : System : Volume : GOSHA_DOCUMENTS Volume Set : ~$ and one that OpenBSD shows SFNs for: ~$ cd-info --dvd [snip common drive info] Disc mode is listed as: DVD-R CD-ROM Track List (1 - 1) #: MSF LSNType Green? Copy? 1: 00:02:00 00 data false no ++ WARN: number of minutes (507) truncated to 99. 170: 99:16:26 446576 leadout (1001 MB raw, 872 MB formatted) __ CD Analysis Report ISO 9660: 2279017 blocks, label `G Save B 6 ' Application: EASY CD CREATOR 6.0 (171) COPYRIGHT (C) 1999-2003 ROXIO, INC. Preparer : Publisher : System : Volume : G Save B 6 Volume Set : UDF: version 0.00 and another: Disc mode is listed as: DVD-R CD-ROM Track List (1 - 1) #: MSF LSNType Green? Copy? 1: 00:02:00 00 data false no ++ WARN: number of minutes (505) truncated to 99. 170: 99:57:63 449688 leadout (1008 MB raw, 878 MB formatted) __ CD Analysis Report ISO 9660: 2269454 blocks, label `G Save B 7 ' Application: EASY CD CREATOR 6.0 (171) COPYRIGHT (C) 1999-2003 ROXIO, INC. Preparer : Publisher : System : Volume : G Save B 7 Volume Set : UDF: version 0.00 So, obviously, the clue is that Roxio obviously didn't put Joliet data on the discs (grrr), which Nero did on the other one. But nevertheless the long file names *are* there because linux reads them. Is there any way to make OpenBSD find the long names anyway? Thanks to all you lovely misc@ers, -Nick If I'm not mistaken your LFN disc only show ISO9660, the SFN discs have an additional UDF: version 0.00 marker. I've never used it so I don't know if it's the right tool for the job but there is mount_udf(8) on OpenBSD. I'll leave it to you if you want to risk trying it, or wait for more knowledgeable people to chime in. Ahhh! You win!! ~$ sudo mount_cd9660 /dev/cd0c /mnt/cd0/ ~$ ls /mnt/cd0/ AUDIOCOMICS FONTSPROGRAMS ~$ mount | grep cd0 /dev/cd0c on /mnt/cd0 type cd9660 (local, read-only, norrip) ~$ #ALLCAPS is a symptom of 8.3 filenames on OpenBSD (n.b. part of Linux's spec is ~$ #that it tolower()s 8.3 filenames to make them less scary, but also less obvious) ~$ sudo umount /mnt/cd0 ~$ sudo mount_udf /dev/cd0c /mnt/cd0/ ~$ ls /mnt/cd0 AudioComics FontsPrograms ~$ mount | grep cd0 /dev/cd0c on /mnt/cd0 type udf (local, read-only) (again, for the records, because this confused me and isn't documented anywhere) norrip means no rock ridge interchange protocol, which is OpenBSD complaining that your ISO is ghetto. I just mounted the same disk on Linux and got this: [kousu@splaat ~]$ sudo mount /dev/sr1 /mnt/cd1 Password: mount: block device /dev/sr1 is write-protected, mounting read-only [kousu@splaat ~]$ mount /dev/sr1 on /mnt/cd1 type udf (ro,relatime,utf8) So, conclusion: if you don't force it, Linux's mount(1) prefers to mount as UDF, whereas OpenBSD falls back to cd9660. AND THE BELLS RANG OUT. Thanks a lot for your eyes, I probably would have given up and done the qemu thing and then maybe next year noticed mount_udf and made the connection. -Nick
