Hi Folks,
I added two disks to my RAID5 array then attempted to reshape it to
RAID 6. And it has been sitting on 0% complete, with no disk I/O
for 24 hours now.
Is there any way to kick the reshape process?
/proc/mdstat is:
Personalities : [raid6] [raid5] [raid4]
md0 : active raid6 sdi1[6] sdh1[5] sdd1[4] sde1[2] sdb1[1] sda1[0]
5860122624 blocks super 1.2 level 6, 512k chunk, algorithm 18 [6/5] [UUUU_U]
[>....................] reshape = 0.0% (0/1953374208) finish=1308.7min speed=24099K/sec
bitmap: 0/15 pages [0KB], 65536KB chunk
unused devices: <none>
What I did:
mdadm --add /dev/md0 /dev/sdh1
mdadm --add /dev/md0 /dev/sdi1
mdadm --grow /dev/md0 --level=6 --raid-devices=6 --backup-file=/root/raid5-backup
dmesg reported:
[691739.298345] md: bind<sdh1>
[691739.364534] RAID conf printout:
[691739.364537] --- level:5 rd:4 wd:4
[691739.364539] disk 0, o:1, dev:sda1
[691739.364540] disk 1, o:1, dev:sdb1
[691739.364541] disk 2, o:1, dev:sde1
[691739.364542] disk 3, o:1, dev:sdd1
[691741.832242] md: bind<sdi1>
[691741.898470] RAID conf printout:
[691741.898474] --- level:5 rd:4 wd:4
[691741.898476] disk 0, o:1, dev:sda1
[691741.898478] disk 1, o:1, dev:sdb1
[691741.898480] disk 2, o:1, dev:sde1
[691741.898481] disk 3, o:1, dev:sdd1
[691741.898482] RAID conf printout:
[691741.898482] --- level:5 rd:4 wd:4
[691741.898484] disk 0, o:1, dev:sda1
[691741.898485] disk 1, o:1, dev:sdb1
[691741.898486] disk 2, o:1, dev:sde1
[691741.898487] disk 3, o:1, dev:sdd1
[691805.469105] md/raid:md0: device sdd1 operational as raid disk 3
[691805.469110] md/raid:md0: device sde1 operational as raid disk 2
[691805.469111] md/raid:md0: device sdb1 operational as raid disk 1
[691805.469112] md/raid:md0: device sda1 operational as raid disk 0
[691805.469551] md/raid:md0: allocated 5424kB
[691805.506035] md/raid:md0: raid level 6 active with 4 out of 5 devices, algori
thm 18
[691805.506050] RAID conf printout:
[691805.506051] --- level:6 rd:5 wd:4
[691805.506053] disk 0, o:1, dev:sda1
[691805.506054] disk 1, o:1, dev:sdb1
[691805.506055] disk 2, o:1, dev:sde1
[691805.506056] disk 3, o:1, dev:sdd1
[691805.847329] RAID conf printout:
[691805.847333] --- level:6 rd:6 wd:5
[691805.847335] disk 0, o:1, dev:sda1
[691805.847336] disk 1, o:1, dev:sdb1
[691805.847337] disk 2, o:1, dev:sde1
[691805.847338] disk 3, o:1, dev:sdd1
[691805.847340] disk 4, o:1, dev:sdi1
[691805.847350] RAID conf printout:
[691805.847350] --- level:6 rd:6 wd:5
[691805.847351] disk 0, o:1, dev:sda1
[691805.847352] disk 1, o:1, dev:sdb1
[691805.847353] disk 2, o:1, dev:sde1
[691805.847354] disk 3, o:1, dev:sdd1
[691805.847354] disk 4, o:1, dev:sdi1
[691805.847355] disk 5, o:1, dev:sdh1
[691805.847424] md: reshape of RAID array md0
[691805.847426] md: minimum _guaranteed_ speed: 1000 KB/sec/disk.
[691805.847428] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for reshape.
[691805.847439] md: using 128k window, over a total of 1953374208k.
And nothing since.
--
Dr Peter Chubb http://www.data61.csiro.au
http://www.ssrg.nicta.com.au Software Systems Research Group/NICTA/Data61
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