On 07/03/2018 09:24 PM, Chris Ross wrote: > Okay. So, in prepping a chroot'd md/zfs environemnt on this machine, while > updating the kernel packages, I see: > > /etc/kernel/postinst.d/zz-update-grub: > Generating grub configuration file ... > Found linux image: /boot/vmlinuz-4.16.0-2-sparc64-smp > Found initrd image: /boot/initrd.img-4.16.0-2-sparc64-smp > /usr/sbin/grub-probe: error: disk `md0' not found. > /usr/sbin/grub-probe: error: disk `md0' not found. > /usr/sbin/grub-probe: error: disk `md0' not found. > Found linux image: /boot/vmlinuz-4.16.0-1-sparc64-smp > Found initrd image: /boot/initrd.img-4.16.0-1-sparc64-smp > /usr/sbin/grub-probe: error: disk `md0' not found. > /usr/sbin/grub-probe: error: disk `md0' not found. > Found Debian GNU/Linux buster/sid on /dev/sdd2 > done > > This leads me to the same problem I had earlier, grub (grub-probe or > grub-install) saying "error: disk `md0' not found." I think this is why > I started down a path of looking for an alternative grub2.
Well, you need to tell GRUB to install on the individual disks and not on the RAID (md0), this won't work - with any boot loader. > Googling for this error leads me to many people that had had this error, > sometimes an old double-free problem that isn't hitting me, > and problems with one-disk md RAID arrays, which isn't my issue. But I > don't see anyone with a solution to my problem without the others. I > fear I just don't know what I'm looking for. What double-free problem? That would indicate a software bug, but this isn't a bug. You just need to tell GRUB not to use md0 as the target block device as GRUB won't be able to map this to actual physical disks. > If anyone else is more familiar with using grub, and has any idea > how to work around this current situation, I'd appreciate a pointer. > > (chroot) root@t5120# grub-install --force --skip-fs-probe /dev/md0 > Installing for sparc64-ieee1275 platform. > grub-install: error: disk `md0' not found. > (chroot) root@t5120# ls -l /dev/md* > brw-rw---- 1 root disk 9, 0 Jul 3 14:26 /dev/md0 > crw------- 1 root root 10, 62 Jul 3 12:19 /dev/mdesc > (chroot) root@t5120# df /boot > Filesystem 1K-blocks Used Available Use% Mounted on > /dev/md0 458396 63776 366432 15% /boot > (chroot) root@t5120# Don't use /dev/md0, use /dev/sd* and install on any of the disks that are part of the RAID. You cannot boot from /dev/md0 as the kernel needs to be running to be able to access the software RAID device. Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer - glaub...@debian.org `. `' Freie Universitaet Berlin - glaub...@physik.fu-berlin.de `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
