[PVE-User] Debian guests losing track of drive sequence?

[Patrick Wade]

I have a PVE 7.1-10 environment with several Debian 11 guests; in some of these guests, I have added a second, scsi1 virtual hard disk in addition to the scsi0 boot virtual disk.  I have referenced these as /dev/sda and /dev/sdb in /etc/fstab in the guest.

>From time to time, when rebooting the guest, the drives are mounted in the wrong order; the content that was in /dev/sdb1 is mounted as the root partition, as if it were /dev/sda1.

What am I missing that I need to do to ensure the guest mounts its virtual disks in the correct manner?

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Patrick R. Wade