[rear-users] Thanks a lot for this great software

Johannes Meixner jsmeix at suse.de
Fri Dec 7 15:12:41 CET 2012


Hello,

On Dec 7 13:08 Andreas Tarp wrote (excerpt):
> HP DL380 nodes running SLES11

Do those HP DL380 nodes have a built-in local harddisk that you use
to install the operating system or are they diskless and/or do you
perhaps even use SAN with multipath?


> we are on rear-1.13.0-45.git201208022252 version
> SLES standard installation uses device IDs instead of normal device names.
> As our rear release was not able to scope with device IDs we changed
> device names in /etc/fstab, /boot/grub/menu.lst and /boot/grub/device.map
> back to normal device names.

Yes, you may have a look at
http://en.opensuse.org/SDB:Disaster_Recovery

Off the top of my head I think you could somehow specify in the
installation settings that a SLES installation uses traditional
device nodes /dev/sd* but right now I don't find the documentation.

Right now a colleague told me that the persistent storage device names
are also somehow stored in the initrd - scaring!
On my SLED11-SP2 workstation I can verify this:
-----------------------------------------------------------------------
# grep ' / ' /etc/fstab
/dev/disk/by-id/ata-ST3320418AS_9VM9JAXK-part1 / ...

# zcat /boot/initrd | strings | grep ST3320418AS
... fallback_rootdev='/dev/disk/by-id/ata-ST3320418AS_9VM9JAXK-part1'
... rootdev='/dev/disk/by-id/ata-ST3320418AS_9VM9JAXK-part1'
... resumedev='/dev/disk/by-id/ata-ST3320418AS_9VM9JAXK-part3'
...
-----------------------------------------------------------------------

Luckily it worked also for me to change only /etc/fstab,
/boot/grub/menu.lst and /boot/grub/device.map to use
traditional device nodes.

Currently I don't know for what the persistent storage device names
are used in initrd.

To be really 100% correct I assume one would also need to re-generate
the initrd so that everywhere traditional device nodes are used
(hoping that initrd is the last file where it is stored).


Kind Regards
Johannes Meixner
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