[ILUG] Booting a broken raid array
gmccullagh at gmail.com
Thu Jan 15 22:13:53 GMT 2009
On Thu, 15 Jan 2009, Kevin Philp wrote:
> I am looking for some advice on setting up a small raid array to replace
> our current single disk system in the office. The plan is to have a
> small Debian server with three disks, two running and a spare, in a raid
> 1 array and then run LVM on top.
> My question is about booting after a disk failure, particularly the
> primary disk. Where should I put the /boot partition, should it be
> outside of the raid array? can it be part of the raid array or can it
> even be part of the LVM groups?
If it's not RAIDed, what happens if you lose the disk /boot is on?
I'd have /boot on RAID1 personally. Oh and take the time to get a working
grub on each disk, not just the first one. It's easy enough to put grub on
a cdrom/floppy if you need to, but if you're not there and someone else has
to deal with things, if it just boots, you'll be glad of it.
I must admit I never bother separating /boot from / any more. I just find
myself a few years down the road cursing the small /boot as I try to work
out which kernels to remove during an upgrade. I know one reason to do
this was old bioses not being able to read large partitions. Perhaps I'm
missing a big security issue here?
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