This is why I always recommend using by-path references in /etc/fstab rather
than the dasdxx entries.

What happened is that something disturbed the order of DASD detection --
moving the guest to different disks on a different system, in your case --
and the system detected the disks and assigned them to some other dasdxx
entry. Udev is supposed to handle this better, but it doesn't always work,
where the by-path entries DO always work (at least as long as you don't
change the virtual address at which the disk is presented to the virtual
machine, at which point: your gun, your foot).

Avoid relying on dasdxx entries. As you discovered, they'll bite you.

--d b

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