On Tue, Feb 19, 2002 at 12:10:46PM -0800, David Rees wrote:
...
> Say you had a simple RAID1 setup mirroring /dev/hda and /dev/hdc and
> /dev/hda goes out. What do you do, then?
You boot as usual. I do, at least :)
LILO (and GRUB I suppose) will write correct boot sectors on both disks, and
you'll have /boot (or entire /) on a RAID-1.
This is, as with any other solution, something you want to test before putting
it in production. Some BIOSes will "magically" rename /dev/hdc into BIOS disk
0x80 if you unplug /dev/hda.
> With a hardware RAID controller
> you don't have to worry about it, but maybe I just don't have the right
> knowledge in this case. Can you plug /dev/hdc into /dev/hda, put the new
> drive into /dev/hdc? What about LILO/GRUB? According to the Software RAID
> HOWTO the best alternative is to use a floppy to boot, but floppies aren't
> exactly known for their reliability. Also, can you boot off anything other
> than RAID1? The howto doesn't say you can...
Nope - RAID-1 for /boot.
But it's 20-50 MB usually. Even if you want / on RAID-5, it shouldn't
be a problem to keep /boot on RAID-1.
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