[clug] How to make my server robust for booting

Bob Edwards bob at cs.anu.edu.au
Wed Sep 11 01:48:28 UTC 2019

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.

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