Hi,
I have an old debian etch backup server. It has 5 drives in raid4.
I want to add a sixth drive to jump to raid6. I don't want to upgrade
debian etch, because the server is working real fine, and doing an
upgrade would be too much problems.
Here it is:
backup:~# uname -a
Linux backup 2.6.24-etchnhalf.1-686 #1 SMP Sat Aug 15 16:51:49 UTC 2009 i686 GNU/Linux
backup:~# mdadm -D /dev/md1
/dev/md1:
Version : 01.01.03
Creation Time : Fri Nov 2 23:35:37 2007
Raid Level : raid5
Array Size : 1933614592 (1844.04 GiB 1980.02 GB)
Device Size : 966807296 (461.01 GiB 495.01 GB)
Raid Devices : 5
Total Devices : 5
Preferred Minor : 1
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Thu Nov 12 21:59:15 2009
State : active
Active Devices : 5
Working Devices : 5
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 128K
Name : backup:1 (local to host backup)
UUID : 22f22c35:99613d52:31d407a6:55bdeb84
Events : 718938
Number Major Minor RaidDevice State
5 22 3 0 active sync /dev/hdc3
1 8 3 1 active sync /dev/sda3
3 3 3 2 active sync /dev/hda3
4 8 35 3 active sync /dev/sdc3
6 8 19 4 active sync /dev/sdb3
backup:~#
And so my plan is to get some liveCD with 2.6.31 (or maybe 2.6.32 ?).
Connect the sixth drive, boot liveCD, perform the migration:
mdadm --add /dev/md2 /dev/sdd3
mdadm --grow /dev/md2 --level=raid6 --raid-disks=6
Then reboot back into linux 2.6.24.
Will this work?
Will 2.6.24 understand such raid6 ?
thanks a lot for your help
--
Janek Kozicki |
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