On 9/3/2011 5:17 AM, Robin Hill wrote:
On Sat Sep 03, 2011 at 04:35:39 -0700, Simon Matthews wrote:
On Fri, Sep 2, 2011 at 8:42 AM, Timothy D. Lenz<tlenz@xxxxxxxxxx> wrote:
How did you install Grub on the second drive? I have seen some
instructions on the web that would not allow the system to boot if the
first drive failed or was removed.
I think this is how I did it, at least it is what I had in my notes:
grub-install /dev/sda&& grub-install /dev/sdb
And this is from my notes also. It was from an IRC chat. Don't know if it
was the raid channel or the grub channel:
[14:02]<Jordan_U> Vorg: No. First, what is the output of grub-install
--version?
[14:02]<Vorg> (GNU GRUB 1.98~20100115-1)
[14:04]<Jordan_U> Vorg: Ok, then run "grub-install /dev/sda&& grub-install
/dev/sdb" (where sda and sdb are the members of the array)
Which is exactly my point. You installed grub on /dev/sdb such that it
would boot off /dev/sdb. But if /dev/sda has failed, on reboot, the
hard drive that was /dev/sdb is now /dev/sda, but Grub is still
looking for its files on the non-existent /dev/sdb.
The way I do it is to run grub, then for each drive do:
device (hd0) /dev/sdX
root (hd0,0)
setup (hd0)
That should set up each drive to boot up as the first drive.
Cheers,
Robin
That is how I was trying to do it when I first set it up and was having
problems with it not working. The grub people said not to do it that way
because of a greater potential for problems.
The way I read the line I think I used, "&&" is used to put two commands
on the same line, so it should have done both. But, If I did that from
user vorg instead of user root, I would have needed sudo before both
grub-install commands. I can't remember now what I did.
The second drive is teh one that died and was removed, but I guess if
sda wasn't bootable, it could have been booting off of sdb the whole time.
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