[KLUG Members] Re: RAID

Adam Williams members@kalamazoolinux.org
Mon, 16 Dec 2002 11:15:46 -0500 (EST)


>>Does MD/EVM support mirroring the boot device (/ and company)?
>Yes, if you boot with grub.

Yes, with MD and LVM1.  LVM1 != LVM2 != EVM.  LVM1 is what the stock 
2.4.x kernel supports.  It does require a little tweaking however.

I don't know about EVM or LVM2 at this point.

However, the distro installers themselves appear not to support this.

Personally I find it is easier just to use a very small, standard, /boot 
partition.  Root itself can be MD/LVM without any problems,  as 
raidstart/vgscan/vgschange are usually included in initrd.  

On most PC class systems your going to need a CD/floppy kernel disk to 
get going again if you physically loose the boot device, they're BIOSs
or whatever are just too stupid to know what to do.

So there isn't much of a point in a MD'd LVM'd /boot (which only needs 
to be ~32Mb anyway).