System Recovery

[Ben Scott]

On Thu, Jul 17, 2008 at 12:03 PM, Michael ODonnell
<michael.odonnell at comcast.net> wrote:
> ... silent promotion to /dev/sda and
> all references to /dev/sdb* are (if you're lucky) now useless
> while all references to /dev/sda* now refer to the device that
> was formerly /dev/sdb*.

  Yah, that's why Red Hat and others have switched to using filesystem
labels instead of physical devices to specify mounts.  Even if the
disks moves, the label stays the same.  Of course, this ended up
trading one set of problems for another.  In particular, by default,
root disks from all Red Hat systems will have the same label ("/").
If you need to put a disk from one Red Hat system in another, you now
have two filesystems with the same label.  :-(

  Supposedly, with the right combination of kernel options (and maybe
patches), you can switch to device paths based on physical layout.
You end up with something like /dev/scsi/bus0/id0 and
/dev/scsi/bus1/id2 and so on.  But I've never looked into it and I
don't even know if it actually works.

-- Ben