Re: [CentOS] dd iso to flash drive
On 08/13/2015 11:06 PM, Digimer wrote: On 13/08/15 09:15 PM, Johnny Hughes wrote: On 08/13/2015 02:30 PM, Thomas Eriksson wrote: On 08/13/2015 11:34 AM, Digimer wrote: Booting from the USB requires that there is a syslinux directory to boot off of. In EL6, there is only isolinux, which is what booting from a DVD uses. You should be able to copy isolinux to syslinux, rename the files from s/iso/sys/ and then update syslinux.cfg to point to the USB drive to boot from. Here's an example from my setup: Perhaps something went wrong with the 6.7 DVD, I haven't tested yet. It is definitely supposed to work by just using dd to a USB stick. Both 6.5 and 6.6 DVDs works just fine and so does the 6.7-network- install iso. I just installed a node 10 minutes ago using that one booted from a USB stick. I just dd'ed the 6.7 DVD1 image to a usb key and booted fine with it on a machine with normal BIOS. I'll test it on a UEFI machine later, but it seems to work fine. One thing to make sure is that the key is unmounted before you start // I used this command: sudo dd if=./CentOS-6.7-x86_64-bin-DVD1.iso of=/dev/sdc bs=4M (Also make sure to copy to the device and not a partition .. ie, not /dev/sdc1 .. /dev/sdc) And make sure to use the command: sync after the dd .. and umount/eject the device if it remoted before removing the key from the machine where you are copying it. My apologies for the mis-information. Did this change in a recent release? (The addition of syslinux to the ISO, that is) I did not see a syslinux only isolinux .. it still boots and installs on my Dell M4500 laptop as is. signature.asc Description: OpenPGP digital signature ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] dd iso to flash drive
Booting from the USB requires that there is a syslinux directory to boot off of. In EL6, there is only isolinux, which is what booting from a DVD uses. You should be able to copy isolinux to syslinux, rename the files from s/iso/sys/ and then update syslinux.cfg to point to the USB drive to boot from. Here's an example from my setup: LABEL next MENU LABEL ^A) Boot the next device as configured in your BIOS MENU DEFAULT localboot -1 LABEL usb-new-striker01 MENU LABEL ^1) New Striker Dashboard 01 - RHEL 6 - USB - Deletes All Existing Data! TEXT HELP Installs a new Striker Dashboard 01 using RHEL 6. Will create a traditional /boot + MBR install for systems with traditional BIOSes. Partition will be 0.5 GiB /boot, 4 GiB swap, remainder for /. ENDTEXT KERNEL vmlinuz APPEND initrd=initrd.img repo=hd:sdb1:/ ks=hd:sdb1:ks/usb-new-striker01.ks LABEL usb-new-striker02 MENU LABEL ^2) New Striker Dashboard 02 - RHEL 6 - USB - Deletes All Existing Data! TEXT HELP Installs a new Striker Dashboard 02 using RHEL 6. Will create a traditional /boot + MBR install for systems with traditional BIOSes. Partition will be 0.5 GiB /boot, 4 GiB swap, remainder for /. ENDTEXT KERNEL vmlinuz APPEND initrd=initrd.img repo=hd:sdb1:/ ks=hd:sdb1:ks/usb-new-striker02.ks label rescue MENU LABEL ^B) Rescue installed system MENU HELP Boot the RHEL 6.6 DVD in rescue mode. ENDTEXT KERNEL vmlinuz APPEND initrd=initrd.img rescue label memtest86 MENU LABEL ^C) Memory test MENU HELP Test the RAM in the system for defects. ENDTEXT KERNELmemtest APPEND - Delete the ks... from the APPEND line if you don't want to use a custom KS (the existing data from isolinux.cfg should show this, more or less). I personally re-rolled the ISO so that this (modified) syslinux.cfg was in the ISO, so that I didn't have to do it after the fact. hth digimer On 13/08/15 02:21 PM, Wes James wrote: I’ve been trying to get the dd of an iso to a usb flash drive to work for CentOS 6.7. It is working with the CentOS 7 DVD1 iso (x64), but if I use the same process with 6.7 bin dvd1 iso or the 6.7 live dvd, the flash drive will not boot. I thought 6.x and forward could be done like this. -wes ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education? ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] dd iso to flash drive
On 08/13/2015 11:34 AM, Digimer wrote: Booting from the USB requires that there is a syslinux directory to boot off of. In EL6, there is only isolinux, which is what booting from a DVD uses. You should be able to copy isolinux to syslinux, rename the files from s/iso/sys/ and then update syslinux.cfg to point to the USB drive to boot from. Here's an example from my setup: Perhaps something went wrong with the 6.7 DVD, I haven't tested yet. It is definitely supposed to work by just using dd to a USB stick. Both 6.5 and 6.6 DVDs works just fine and so does the 6.7-network- install iso. I just installed a node 10 minutes ago using that one booted from a USB stick. Thomas ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] dd iso to flash drive
On 13/08/15 09:15 PM, Johnny Hughes wrote: On 08/13/2015 02:30 PM, Thomas Eriksson wrote: On 08/13/2015 11:34 AM, Digimer wrote: Booting from the USB requires that there is a syslinux directory to boot off of. In EL6, there is only isolinux, which is what booting from a DVD uses. You should be able to copy isolinux to syslinux, rename the files from s/iso/sys/ and then update syslinux.cfg to point to the USB drive to boot from. Here's an example from my setup: Perhaps something went wrong with the 6.7 DVD, I haven't tested yet. It is definitely supposed to work by just using dd to a USB stick. Both 6.5 and 6.6 DVDs works just fine and so does the 6.7-network- install iso. I just installed a node 10 minutes ago using that one booted from a USB stick. I just dd'ed the 6.7 DVD1 image to a usb key and booted fine with it on a machine with normal BIOS. I'll test it on a UEFI machine later, but it seems to work fine. One thing to make sure is that the key is unmounted before you start // I used this command: sudo dd if=./CentOS-6.7-x86_64-bin-DVD1.iso of=/dev/sdc bs=4M (Also make sure to copy to the device and not a partition .. ie, not /dev/sdc1 .. /dev/sdc) And make sure to use the command: sync after the dd .. and umount/eject the device if it remoted before removing the key from the machine where you are copying it. My apologies for the mis-information. Did this change in a recent release? (The addition of syslinux to the ISO, that is) -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education? ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] dd iso to flash drive
On 08/13/2015 02:30 PM, Thomas Eriksson wrote: On 08/13/2015 11:34 AM, Digimer wrote: Booting from the USB requires that there is a syslinux directory to boot off of. In EL6, there is only isolinux, which is what booting from a DVD uses. You should be able to copy isolinux to syslinux, rename the files from s/iso/sys/ and then update syslinux.cfg to point to the USB drive to boot from. Here's an example from my setup: Perhaps something went wrong with the 6.7 DVD, I haven't tested yet. It is definitely supposed to work by just using dd to a USB stick. Both 6.5 and 6.6 DVDs works just fine and so does the 6.7-network- install iso. I just installed a node 10 minutes ago using that one booted from a USB stick. I just dd'ed the 6.7 DVD1 image to a usb key and booted fine with it on a machine with normal BIOS. I'll test it on a UEFI machine later, but it seems to work fine. One thing to make sure is that the key is unmounted before you start // I used this command: sudo dd if=./CentOS-6.7-x86_64-bin-DVD1.iso of=/dev/sdc bs=4M (Also make sure to copy to the device and not a partition .. ie, not /dev/sdc1 .. /dev/sdc) And make sure to use the command: sync after the dd .. and umount/eject the device if it remoted before removing the key from the machine where you are copying it. signature.asc Description: OpenPGP digital signature ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
