Hello Neil , Inline .
On Fri, 9 Sep 2005, Neil Brown wrote:
On Thursday September 8, babydr@xxxxxxxxxxxxxxxx wrote:
Hello All , Is there a documented procedure to follow during
creation or after that will get a raid6 array to self
rebuild ?
I suspect a kernel upgrade would do the trick, though you don't say
what kernel you are running.
You could probably kick it along by removing and re-adding your spare:
mdadm /dev/md_d0 --remove /dev/sdao
mdadm /dev/md_d0 --add /dev/sdao
(And I assume you mean 'raid5' rather than 'raid6', not that it
matters..)
Sorry , yes I meant raid5 .
My kernel version is .
root@devel-0:/ # uname -a
Linux devel-0 2.6.12.5 #1 SMP Fri Aug 26 20:09:46 UTC 2005 i686 GNU/Linux
When I try to do the remove I get .
root@devel-0:/ # mdadm /dev/md_d0 --remove /dev/sdao
mdadm: hot remove failed for /dev/sdao: Device or resource busy
I should also have 3 other drives that are spares . I could
try hot remove on one of them . See at bottom the output of
mdadm --misc -Q --detail /dev/md_d0
Which is showing no spare drives ? And I built it with 4
spares
root@devel-0:~ # cat /etc/mdadm.conf
DEV /dev/sd[c-l] /dev/sd[n-w] /dev/sd[yz] /dev/sda[a-h] /dev/sda[j-s]
ARRAY /dev/md_d0 level=raid5 num-devices=36 spares=4 UUID=2006d8c6:71918820:247e00b0:460d5bc1
c-l is 10 devices (one is dead 'e' leaves 9) .
n-w is 10 devices
yz is 2 devices
aa-h is 8 devices
aj-s is 10 devices
----------
40 devices given in mdadm.conf
-1 dead device .
----------
39 devices
36 devices used (per /proc/mdstat)
----------
3 devices for spares .
# cat /proc/mdstat
...snip...
md_d0 : active raid5 sdc[0] sdao[40] sdan[34] sdam[33] sdal[32]
sdak[31] sdaj[30] sdah[29] sdag[28] sdaf[27] sdae[26] sdad[25]
sdac[24] sdab[23] sdaa[22] sdz[21] sdy[20] sdw[19] sdv[18] sdu[17]
sdt[16] sds[15] sdr[14] sdq[13] sdp[12] sdo[11] sdn[10] sdl[9] sdk[8]
sdj[7] sdi[6] sdh[5] sdg[4] sdf[3] sde[2](F) sdd[1]
1244826240 blocks level 5, 64k chunk, algorithm 2 [36/35]
[UU_UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU]
/dev/md_d0:
Version : 01.02.01
Creation Time : Sun Aug 28 17:46:59 2005
Raid Level : raid5
Array Size : 1244826240 (1187.16 GiB 1274.70 GB)
Device Size : 35566464 (33.92 GiB 36.42 GB)
Raid Devices : 36
Total Devices : 36
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Thu Sep 8 06:26:10 2005
State : clean, degraded
Active Devices : 35
Working Devices : 35
Failed Devices : 1
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Name :
UUID : 2006d8c6:71918820:247e00b0:460d5bc1
Events : 5308
Number Major Minor RaidDevice State
0 8 32 0 active sync /dev/sdc
1 8 48 1 active sync /dev/sdd
0 0 0 0 removed
3 8 80 3 active sync /dev/sdf
4 8 96 4 active sync /dev/sdg
5 8 112 5 active sync /dev/sdh
6 8 128 6 active sync /dev/sdi
7 8 144 7 active sync /dev/sdj
8 8 160 8 active sync /dev/sdk
9 8 176 9 active sync /dev/sdl
10 8 208 10 active sync /dev/sdn
11 8 224 11 active sync /dev/sdo
12 8 240 12 active sync /dev/sdp
13 65 0 13 active sync /dev/sdq
14 65 16 14 active sync /dev/sdr
15 65 32 15 active sync /dev/sds
16 65 48 16 active sync /dev/sdt
17 65 64 17 active sync /dev/sdu
18 65 80 18 active sync /dev/sdv
19 65 96 19 active sync /dev/sdw
20 65 128 20 active sync /dev/sdy
21 65 144 21 active sync /dev/sdz
22 65 160 22 active sync /dev/sdaa
23 65 176 23 active sync /dev/sdab
24 65 192 24 active sync /dev/sdac
25 65 208 25 active sync /dev/sdad
26 65 224 26 active sync /dev/sdae
27 65 240 27 active sync /dev/sdaf
28 66 0 28 active sync /dev/sdag
29 66 16 29 active sync /dev/sdah
30 66 48 30 active sync /dev/sdaj
31 66 64 31 active sync /dev/sdak
32 66 80 32 active sync /dev/sdal
33 66 96 33 active sync /dev/sdam
34 66 112 34 active sync /dev/sdan
40 66 128 35 active sync /dev/sdao
2 8 64 - faulty spare /dev/sde
--
+------------------------------------------------------------------+
| James W. Laferriere | System Techniques | Give me VMS |
| Network Engineer | 3542 Broken Yoke Dr. | Give me Linux |
| babydr@xxxxxxxxxxxxxxxx | Billings , MT. 59105 | only on AXP |
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