GRUB, booting, and SW RAID 1+0...
Bill McGonigle
bill at bfccomputing.com
Wed Feb 15 16:40:01 EST 2006
On Feb 15, 2006, at 11:43, Paul Lussier wrote:
> Uptime and stability is far more important, so I thought I'd play
> around with the software RAID stuff again since it's been a while. I
> was thinking of striping mirroring disks A & B and C & D, then
> striping across those two sets.
The kids these days are using LVM to stripe the two md devices.
If anyone can tell me how to convert a script(1) log into a
human-readable text file (accounting for final rendering of escape
sequences, backspaces over all my typos and the like) I can put up a
log of the tutorial we did at DLSLUG a few months back on this. I've
tried the Perl VT100 emulation module but it got the best of me.
You can't boot off an LVM /boot without a lilo hack, but you can setup
a small pair of /boot partitions and set them as a simple RAID-1
mirror, and boot from them using GRUB. Put the rest of that drive and
the other drive in your RAID 10 stripe.
> Since there are only 2 controllers in this system, obviously
> performance will be heavily impacted by mirroring from the primary to
> the secondary on a single controller, but performance isn't an issue
> right now.
Why not put one slice from each mirror on each controller? If you lose
a controller you'll still have all your data, though with two degraded
md devices.
-Bill
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