Re: [BackupPC-users] Best pool cloning technique
2009-11-23 16:59:43
Bowie Bailey wrote:
>
>>> My filesystem is raid 1 (via md) with 3 disks. Two of the disks are
>>> internal and one is in an sata hot-swap enclosure. Whenever I want to
>>> take a backup offsite, I shut down the machine, pull the third drive,
>>> replace it with a new one, and start it back up. Then I just need to
>>> tell md to rebuild onto the new drive and then take the old one
>>> offsite. I always have at least two active drives in the raid, so I
>>> don't have to worry about a disk failure during the rebuild.
>>>
>> You don't even have to shut down as long as your sata controller
>> recognizes hot swaps. Just stop backuppc, unmount the partition, and
>> use mdadm to fail and remove the drive in the raid. Then you can
>> remount and restart backuppc. I don't bring the old offsite copy back
>> until the current one has been taken offsite, and it can be added to the
>> raid at any time, using the mdadm --add command. The re-sync does make
>> the machine very busy for a few hours so you'd want to do it at a time
>> when backups aren't running.
>>
>
> I do the shutdown for two reasons:
>
> 1) My system partition lives on the raid as well as the data, so I have
> to shut down to keep everything consistent.
> 2) My sata controller doesn't recognize hot swaps as far as I have been
> able to determine.
Try a 'dmesg' before and after inserting the drive. If you see the
drive detected, you should be able to start a sync without shutting
down. If you swap one out and in at the same time, you should have a
third one in the offsite rotation so they aren't all in the same place
at the same time.
--
Les Mikesell
lesmikesell AT gmail DOT com
------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
trial. Simplify your report design, integration and deployment - and focus on
what you do best, core application coding. Discover what's new with
Crystal Reports now. http://p.sf.net/sfu/bobj-july
_______________________________________________
BackupPC-users mailing list
BackupPC-users AT lists.sourceforge DOT net
List: https://lists.sourceforge.net/lists/listinfo/backuppc-users
Wiki: http://backuppc.wiki.sourceforge.net
Project: http://backuppc.sourceforge.net/
|
|
|