Simeon> I'd like to set up Raid-1 on my computer. I have 2 500Gig
Simeon> hds, one of which is empty, and one of which has data (that I
Simeon> want to keep). I found this guide,
(I use Ubuntu), and liked the
Simeon> "super simple md" recipe, but I'm not sure how to do this so
Simeon> that I don't loose data. (I searched around, but the only
Simeon> thing I found required the alternate install CD, which I have
Simeon> issues with.)
It's pretty simple actually, and what helps is that you have an empty
The basic steps would be to:
1. Build an MD device onto the new drive, using RAID1, but with a
drive missing. I'd make a pair of primary partitions, one of about
1gb, the other the remaining space. Use the 1GB partition for a
2. Then partition the new MD device (md0 say) or put LVM on top of it
to make your devices.
3. Copy your data from the old non-RAID partitions onto the new ones.
4. When you're done, blow away all the old disk stuff, then add it
into the RAID1 md0 device as the other half of the mirror.
The KEY thing to realize here is that to make sure your system can
continue to boot properly, you will need:
- bootloader on both disk's MBRs
- a non-RAID1 boot partition on both disks
- testing, testing, testing.