Hello,
I have been running a 4 disk raid 5 array with mdadm just fine for the
last couple of months. =A0I went out and got 4 new drives (same model)
and added them on a PCI controller. =A0I was able to add the drives jus=
t
fine. =A0But now my problem is growing the array.
The drives are 8 Seagate 1.5TB drives (ST31500341AS). All have been
tested working.
jaykae-serv:~# mdadm --detail /dev/md1
/dev/md1:
Version : 1.2
Creation Time : Sun Apr 25 17:41:27 2010
Raid Level : raid5
Array Size : 4395402240 (4191.78 GiB 4500.89 GB)
Used Dev Size : 1465134080 (1397.26 GiB 1500.30 GB)
Raid Devices : 4
Total Devices : 8
Persistence : Superblock is persistent
Update Time : Wed Apr 28 14:40:10 2010
State : clean
Active Devices : 4
Working Devices : 8
=46ailed Devices : 0
Spare Devices : 4
Layout : left-symmetric
Chunk Size : 1024K
Name : jaykae-serv:1 (local to host jaykae-serv)
UUID : 71e05a16:b7ef5a50:b2499057:0ff0f6e3
Events : 549
Number Major Minor RaidDevice State
0 8 97 0 active sync /dev/sdg1
1 8 113 1 active sync /dev/sdh1
2 8 129 2 active sync /dev/sdi1
4 8 145 3 active sync /dev/sdj1
5 8 17 - spare /dev/sdb1
6 8 33 - spare /dev/sdc1
7 8 49 - spare /dev/sdd1
8 8 81 - spare /dev/sdf1
My original intention was to turn it into a raid 6 array.
jaykae-serv:~# mdadm --grow /dev/md1 --level=3D6 --raid-disk=3D8
mdadm level of /dev/md1 changed to raid6
mdadm: Need to backup 1501199875784021K of critical section..
mdadm: /dev/md1: Something wrong - reshape aborted
mdadm: aborting level change
I get the same error message with just growing it normally.
jaykae-serv:~# mdadm --grow /dev/md1 --raid-disk=3D8
mdadm: Need to backup 4503599627348992K of critical section..
mdadm: /dev/md1: Something wrong - reshape aborted
One thing I do have to mention is that I had sd[bcdf] in their own
raid 5 array as those were my original drives, but because of some
formatting issues I had to create a second raid 5 array and copy them
over. I had originally partitioned the drives differently and I was
getting an error that my other drives were too small. sd[bcdf] are
all partitioned, but are unformatted.
Any suggestions would be welcomed.
Thanks,
Jeremy
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