Adding XFS mailing list to this e-mail to show that the grow for xfs
worked.
On Thu, 17 Aug 2006, ÊæÐÇ wrote:
I've only tried growing a RAID5, which was the only RAID that I remember
being supported (to grow) in the kernel, I am not sure if its posible to
i know this,but how you grow your raid5,what's your mdadm version?
need anyother configure before creat md & use mdadm -G ..to grow?
grow other types of RAID arrays.
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0) Compile your kernel with experimental raid5 re-sizing support.
1) Add a spare to the RAID5.
2) Grow the array.
Like this:
p34:~# mdadm --create /dev/md3 /dev/hda1 /dev/hde1 /dev/sdc1 --level=5
--raid-disks=3
mdadm: array /dev/md3 started.
p34:~# mdadm -D /dev/md3
/dev/md3:
Version : 00.90.03
Creation Time : Fri Jul 7 15:44:24 2006
Raid Level : raid5
Array Size : 781417472 (745.22 GiB 800.17 GB)
Device Size : 390708736 (372.61 GiB 400.09 GB)
Raid Devices : 3
Total Devices : 3
Preferred Minor : 3
Persistence : Superblock is persistent
Update Time : Fri Jul 7 15:44:24 2006
State : clean, degraded, recovering
Active Devices : 2
Working Devices : 3
Failed Devices : 0
Spare Devices : 1
Layout : left-symmetric
Chunk Size : 64K
Rebuild Status : 0% complete
UUID : cf7a7488:64c04921:b8dfe47c:6c785fa1
Events : 0.1
Number Major Minor RaidDevice State
0 3 1 0 active sync /dev/hda1
1 33 1 1 active sync /dev/hde1
3 8 33 2 spare rebuilding /dev/sdc1
p34:~#
p34:~# df -h | grep /raid5
/dev/md3 746G 80M 746G 1% /raid5
p34:~# umount /dev/md3
p34:~# mdadm -D /dev/md3
/dev/md3:
Version : 00.90.03
Creation Time : Fri Jul 7 15:44:24 2006
Raid Level : raid5
Array Size : 781417472 (745.22 GiB 800.17 GB)
Device Size : 390708736 (372.61 GiB 400.09 GB)
Raid Devices : 3
Total Devices : 4
Preferred Minor : 3
Persistence : Superblock is persistent
Update Time : Fri Jul 7 18:25:29 2006
State : clean
Active Devices : 3
Working Devices : 4
Failed Devices : 0
Spare Devices : 1
Layout : left-symmetric
Chunk Size : 64K
UUID : cf7a7488:64c04921:b8dfe47c:6c785fa1
Events : 0.26
Number Major Minor RaidDevice State
0 3 1 0 active sync /dev/hda1
1 33 1 1 active sync /dev/hde1
2 8 33 2 active sync /dev/sdc1
3 22 1 - spare /dev/hdc1
p34:~# mdadm /dev/md3 --grow --raid-disks=4
mdadm: Need to backup 384K of critical section..
mdadm: ... critical section passed.
p34:~# cat /proc/mdstat
Personalities : [raid1] [raid5] [raid4]
md1 : active raid1 sdb2[1] sda2[0]
136448 blocks [2/2] [UU]
md2 : active raid1 sdb3[1] sda3[0]
70268224 blocks [2/2] [UU]
md3 : active raid5 hdc1[3] sdc1[2] hde1[1] hda1[0]
781417472 blocks super 0.91 level 5, 64k chunk, algorithm 2 [4/4]
[UUUU]
[>....................] reshape = 0.0% (85120/390708736)
finish=840.5min speed=7738K/sec
md0 : active raid1 sdb1[1] sda1[0]
2200768 blocks [2/2] [UU]
unused devices: <none>
p34:~# cat /proc/mdstat
Personalities : [raid1] [raid5] [raid4]
md1 : active raid1 sdb2[1] sda2[0]
136448 blocks [2/2] [UU]
md2 : active raid1 sdb3[1] sda3[0]
70268224 blocks [2/2] [UU]
md3 : active raid5 hdc1[3] sdc1[2] hde1[1] hda1[0]
781417472 blocks super 0.91 level 5, 64k chunk, algorithm 2 [4/4]
[UUUU]
[>....................] reshape = 0.0% (286284/390708736)
finish=779.8min speed=8342K/sec
md0 : active raid1 sdb1[1] sda1[0]
2200768 blocks [2/2] [UU]
unused devices: <none>
p34:~#
p34:~# mount /raid5
p34:~# xfs_growfs /raid5
meta-data=/dev/md3 isize=256 agcount=32, agsize=6104816
blks
= sectsz=4096 attr=0
data = bsize=4096 blocks=195354112, imaxpct=25
= sunit=16 swidth=48 blks, unwritten=1
naming =version 2 bsize=4096
log =internal bsize=4096 blocks=32768, version=2
= sectsz=4096 sunit=1 blks
realtime =none extsz=196608 blocks=0, rtextents=0
data blocks changed from 195354112 to 195354368
p34:~#
p34:~# umount /raid5
p34:~# mount /raid5
p34:~# df -h
/dev/md3 746G 80M 746G 1% /raid5
p34:~#
