Steve Huff wrote:

On Mar 2, 2006, at 9:47 AM, Bowie Bailey wrote:

...

Or you could do this:

RAID 1 partition: md0 = 80GB (or whatever the useable total is)

Then include md0 in VolGroup00 and create your logical volumes.

LV0 = 300MB (/boot) LV1 = 500MB (swap) LV2 = 9.2GB (/) LV3 = 70GB (/home)

This way everything is mirrored and everything is in one VG. If you need more space, add another pair of mirrored drives and add the new mirrored device into VolGroup00. Then you can use the space to expand whichever filesystem needs it. I would also advise following the previous poster's advice and leaving a few GB unused so that you aren't forced to add more drives immediately when LV2 fills up faster than you expected.

i was under the impression that GRUB doesn't know how to boot from a logical volume, and so the configuration you describe won't work without a bit of tweaking, like so:

two SW RAID 1 sets: md0: 100MB, format as ext3, /boot md1: the remaining space, mark as LVM

VolGroup00: LV0 = 1GB swap LV1 = 1GB /var LV2 = 9.2GB / LV3 = some more space for whatever you need

That's a good point. I don't know if grub will boot from it or not. I haven't tried that on my Linux systems yet, but it is the way I do things with my other unix boxes.

also, does anyone know if RHEL4 has fixed the problem of GRUB only being installed on the first drive of a SW RAID set? refer to this doc for more discussion:

http://lists.us.dell.com/pipermail/linux-poweredge/2003-July/008898.html

I remember that thread, but I don't know if there was any resolution.