12 messages in com.ubuntu.lists.ubuntu-ukRe: [ubuntu-uk] RAID 1 with three drives| From | Sent On | Attachments |
|---|---|---|
| Rob Beard | Mar 2, 2009 2:40 am | |
| Tony Travis | Mar 2, 2009 2:47 am | |
| Rob Beard | Mar 2, 2009 3:34 am | |
| Alan Pope | Mar 2, 2009 3:42 am | |
| Andrew Oakley | Mar 2, 2009 4:18 am | |
| Alan Pope | Mar 2, 2009 4:31 am | |
| Samuel Toogood | Mar 2, 2009 4:32 am | |
| Andrew Oakley | Mar 2, 2009 4:39 am | |
| Rob Beard | Mar 2, 2009 5:51 am | |
| Rob Beard | Mar 2, 2009 5:53 am | |
| Alan Pope | Mar 2, 2009 6:03 am | |
| Rob Beard | Mar 2, 2009 6:20 am |
| Subject: | Re: [ubuntu-uk] RAID 1 with three drives | |
|---|---|---|
| From: | Samuel Toogood (sam_...@athsoc.org.uk) | |
| Date: | Mar 2, 2009 4:32:44 am | |
| List: | com.ubuntu.lists.ubuntu-uk | |
Alan Pope wrote:
2009/3/2 Rob Beard <ro...@esdelle.co.uk>:
The idea I had was if this is possible, I could attach one of the drives externally via eSATA so it can be taken off site and in the event of a server failure this off site backup could be plugged in and the server could be back up and running in minutes rather than a good few hours of re-installation (I was thinking of having two external drives so they can be alternatively swapped every day).
You'll need a script to re-add the disk into the array to start the sync, and yank it from the array before being unplugged, which is of course easily do-able with "mdadm".
Of course as soon as you add the disk back into the array you're going to cause a boatload of IO as the array resyncs from the internal disks back out to the external one, and that's going to happen _every_ time you plug the disk(s) in.
Cheers, Al.
Are you thinking of this as the only backup? Recovery of accidentally deleted files might be a bit fiddly if so.
Sam