Is it possible?
Booting the installer from the CD works, finds the USB drive, and allows me to put the root filesystem on it. I put the /boot partition on the internal hard drive and installed GRUB in the boot record of that partition.
GRUB shows the menu and begins booting, but eventually fails with the error that /dev/sda5 (the external partition) does not exist.
I was hoping (perhaps in vain) that initrd would provide the necessary modules/hooks to mount the USB device. Is there some step of the installation that I'm missing, or something extra that I need to do by hand, like in the old days when LILO had to be explicitly told about SCSI cards?
Bart Schaefer wrote:
Is it possible?
Booting the installer from the CD works, finds the USB drive, and allows me to put the root filesystem on it. I put the /boot partition on the internal hard drive and installed GRUB in the boot record of that partition.
GRUB shows the menu and begins booting, but eventually fails with the error that /dev/sda5 (the external partition) does not exist.
I was hoping (perhaps in vain) that initrd would provide the necessary modules/hooks to mount the USB device. Is there some step of the installation that I'm missing, or something extra that I need to do by hand, like in the old days when LILO had to be explicitly told about SCSI cards?
My guess is that you will need to manually add the various usb and scsi drivers to the initrd image. You might even have to mount /proc/bus/usb at the initrd stage. Also check the initrd creates the necessary device files for your drive
James Pearson
Bart Schaefer wrote:
Is it possible?
Booting the installer from the CD works, finds the USB drive, and allows me to put the root filesystem on it. I put the /boot partition on the internal hard drive and installed GRUB in the boot record of that partition.
GRUB shows the menu and begins booting, but eventually fails with the error that /dev/sda5 (the external partition) does not exist.
I was hoping (perhaps in vain) that initrd would provide the necessary modules/hooks to mount the USB device. Is there some step of the installation that I'm missing, or something extra that I need to do by hand, like in the old days when LILO had to be explicitly told about SCSI cards? _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
J Austin has a detailed PDF document http://www.vigla.eclipse.co.uk/ about Fedora Core Installation to an External USB Disk Drive http://www.vigla.eclipse.co.uk/usb_install.pdf. To summarize : install, reboot in rescue mode and create a initrd with the USB modules :
mkinitrd ––preload=ehci–hcd ––preload=usb–storage ––preload=scsi_mod \ ––preload=sd_mod /boot/initrd_usb.gz 2.6.9–xx
Since 'modprobe usb–storage' does not wait for the USB drive to come up, you may need to add a '_sleep 5_' in the linuxrc script of initrd as explain on Simon Ilyushchenko mailto:simonf@simonf.com page : http://simonf.com/usb/#older.
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Bart Schaefer -
James Pearson -
Pierre-Francois Honore