"update-grub" and "grub-install /dev/sda" (see attachment) went fine. Key question is still why:
a) Grub bootloader on /dev/sda can't load subsequent modules from /dev/sda3
b) Grub on Proxmox 4.4 install disk can't access kernel/initrd from zfs pool on /dev/sda3.
Thanks for your support!
Update on my problem which is still not solved.
From the shell out of the install disk I could verify that `zpool status rpool` is ok.
I tried to reinstall Grub (https://pve.proxmox.com/wiki/Recover_From_Grub_Failure)
--> no success - after reboot I end up in grub rescue mode
Entering Grub...
Hello,
after recent upgrade from GUI I can't boot the system (ZFS root on RAID1) anymore:
error: no such device: 1d54.....
error: unknown filesystem
Entering rescue mode
grub rescue>
Rebooting via install disk in rescue mode didn't help.
Rebooting via install disk in Install (Debug) mode...
I don't have exactly the same model (B120i instead of B140i), but these budget controllers emulate RAID in software i.e. as part of the driver. HP does not provide drivers for Debian. Solution 1: Switch the RAID into AHCI mode - or - Solution 2: Buy a "real" RAID controller.
Dirk
ps: I'm...
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