Make scsi lun persistent device mapping? (ie Lun10=/dev/sda)

[planet-admin]

Can someone please point me in the right direction to set up persistent device mapping for scsi devices? I have several servers all booting off of fiber channel, and I want to persistently map a particular lun on a per server basis to say /dev/sda

Any help or info is very appreciated.

Thanks,
Michael
_________________
Michael S. Moody
Sr. Systems Engineer
Global Systems Consulting
Web: http://www.GlobalSystemsConsulting.com

[vaxbrat]

Instead of mapping to /dev/sda, let udev do the heavy lifting for you. Make sure you have your filesystems labeled, using e2label for ext2/ext3, "xfs_admin -L" for xfs and so on.

Then use the /dev/disk/by-label entry for the appropriate label as the replacement for /dev/sdxx in the device column of your fstab.

[planet-admin]

[vaxbrat]

I don't bother with initrd as I build my own kernels to include in-kernel support for all disk controllers and filesystems that I use. You're right that another distro like Fedora or even gentoo itself with genkernel sources would need an initrd for a non-standard (ie xfs) filesystem and for most scsi controllers.

As for the filesystems having the same label, not a good idea. If they are really two different filesystems, they should get a unique label unless they were removable media and not likely to be mounted at the same time.

You may also want to look at the by-id and by-path alternatives to find something unique that doesn't float around on you.