Re: howto boot from the second disk in raid 1
- From: Bob Proulx <bob@xxxxxxxxxx>
- Date: Tue, 23 Aug 2011 14:50:23 -0600
Bob Proulx wrote:
# grub
grub> device (hd0) /dev/sdb
grub> root (hd0,0)
grub> setup (hd0)
grub> quit
Oh! I made an (hd0,0) assumption above and didn't explain it. That
valud may be different depending upon your configuration. But in the
old grub you can search for it like this:
grub> find /grub/stage1
(hd0,0)
(hd1,0)
On my system /boot is in /dev/md0 and that is actually /dev/sda1 and
/dev/sdb1 and so the files are found in (hd0,0) and (hd1,0).
Therefore mapping /dev/sdb to hd0 means (hd0,0) will be /dev/sdb1. If
you have /boot some place else then your information will need to be
different.
Again, the new grub is probably completely different. I haven't
worked with it enough to know how to drive it at this level.
Bob
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