/boot on RAID1 with fedora21

[Greg Woods]

On Fri, May 15, 2015 at 2:55 PM, Alex Regan <mysqlstudent at gmail.com> wrote:

> Installing to /dev/md0 has also been a problem. Is the procedure to
> install /dev/sda and /dev/sdb, then switch the boot order in the BIOS when
> sda dies?
>
> Often times when it dies, it won't automatically switch to another disk,
> it seems.
>

This likely depends on your BIOS, and exactly what the problem is with the
drive. If the BIOS doesn't detect the problem drive at all, the other drive
might come up as /dev/sda and become the one it wants to boot from. In
another BIOS (or a different sort of problem where the disk sort of works
but can't be mounted), then you might have to change the boot order in the
BIOS to make it boot off a different drive. That sort of thing didn't
happen in the old days when drives were jumpered as master and slave; the
slave would always be /dev/sdb and the master /dev/sda. But now everything
is SATA, and frequently what happens is the first drive detected is
/dev/sda, and so forth. This is why most distributions don't try to mount
things on device names like /dev/sda1 or even /dev/md0, but instead use
UUID's or file system labels.

--Greg
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