[clug] How to make my server robust for booting
bob at cs.anu.edu.au
Wed Sep 11 03:51:31 UTC 2019
On 11/9/19 1:35 pm, David C wrote:
> installing grub to /dev/md0 (underlying device of RAID1 /boot) has
> worked for me in the past.
Does your /dev/md0 include the MBR of both drives in your RAID1?
Or is the BIOS booting from a boot record mirrored to both partitions
that are part of the RAID?
> On Wed., 11 Sep. 2019, 11:53 am Bob Edwards via linux,
> <linux at lists.samba.org <mailto:linux at lists.samba.org>> wrote:
> On 11/9/19 8:49 am, Tony Lewis via linux wrote:
> > What I'm stuck on is how to handle a failure of the drive where
> GRUB is
> > installed. I thought it might be as simple as doing grub-install
> > /dev/sd[bcd] (as well as on /dev/sda) and BIOS would just find
> *a* copy
> > of GRUB and be able to continue the boot process.
> It may be obvious, but don't forget to add each of disks /dev/sd[bcd]
> to the BIOS boot order, so if it fails to boot from the first, it will
> try the second etc.
> This isn't fool-proof though. If a disk does start to boot (ie. the
> BIOS/UEFI code can read the MBR etc. correctly) and then the disk
> fails, the BIOS won't detect that and your server will be stuck.
> Bob Edwards.
> linux mailing list
> linux at lists.samba.org <mailto:linux at lists.samba.org>
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