Replying. I realize and I apologize I didn't create a subject. I hope
this doesn't confuse majordomo.
> On Sun, 25 Sep 2011 21:23:31 -0700 "Kenn" <kenn@xxxxxxx> wrote:
>
>> I have a raid5 array that had a drive drop out, and resilvered the wrong
>> drive when I put it back in, corrupting and destroying the raid. I
>> stopped the array at less than 1% resilvering and I'm in the process of
>> making a dd-copy of the drive to recover the files.
>
> I don't know what you mean by "resilvered".
Resilvering -- Rebuilding the array. Lesser used term, sorry!
>
>>
>> (1) Is there anything diagnostic I can contribute to add more
>> wrong-drive-resilvering protection to mdadm? I have the command history
>> showing everything I did, I have the five drives available for reading
>> sectors, I haven't touched anything yet.
>
> Yes, report the command history, and any relevant kernel logs, and the
> output
> of "mdadm --examine" on all relevant devices.
>
> NeilBrown
Awesome! I hope this is useful. It's really long, so I edited down the
logs and command history to what I thought were the important bits. If
you want more, I can post unedited versions, please let me know.
### Command History ###
# The start of the sequence, removing sde from array
mdadm --examine /dev/sde
mdadm --detail /dev/md3
cat /proc/mdstat
mdadm /dev/md3 --remove /dev/sde1
mdadm /dev/md3 --remove /dev/sde
mdadm /dev/md3 --fail /dev/sde1
cat /proc/mdstat
mdadm --examine /dev/sde1
fdisk -l | grep 750
mdadm --examine /dev/sde1
mdadm --remove /dev/sde
mdadm /dev/md3 --remove /dev/sde
mdadm /dev/md3 --fail /dev/sde
fdisk /dev/sde
ls
vi /var/log/syslog
reboot
vi /var/log/syslog
reboot
mdadm --detail /dev/md3
mdadm --examine /dev/sde1
# Wiping sde
fdisk /dev/sde
newfs -t ext3 /dev/sde1
mkfs -t ext3 /dev/sde1
mkfs -t ext3 /dev/sde2
fdisk /dev/sde
mdadm --stop /dev/md3
# Putting sde back into array
mdadm --examine /dev/sde
mdadm --help
mdadm --misc --help
mdadm --zero-superblock /dev/sde
mdadm --query /dev/sde
mdadm --examine /dev/sde
mdadm --detail /dev/sde
mdadm --detail /dev/sde1
fdisk /dev/sde
mdadm --assemble --no-degraded /dev/md3 /dev/hde1 /dev/hdi1 /dev/sde1
/dev/hdk1 /dev/hdg1
cat /proc/mdstat
mdadm --stop /dev/md3
mdadm --create /dev/md3 --level=5 --raid-devices=5 /dev/hde1 /dev/hdi1
missing /dev/hdk1 /dev/hdg1
mount -o ro /raid53
ls /raid53
umount /raid53
mdadm --stop /dev/md3
# The command that did the bad rebuild
mdadm --create /dev/md3 --level=5 --raid-devices=5 /dev/hde1 /dev/hdi1
/dev/sde1 /dev/hdk1 /dev/hdg1
cat /proc/mdstat
mdadm --examine /dev/md3
mdadm --query /dev/md3
mdadm --detail /dev/md3
mount /raid53
mdadm --stop /dev/md3
# Trying to get the corrupted disk back up
mdadm --create /dev/md3 --level=5 --raid-devices=5 /dev/hde1 /dev/hdi1
missing /dev/hdk1 /dev/hdg1
cat /proc/mdstat
mount /raid53
fsck -n /dev/md3
### KERNEL LOGS ###
# Me messing around with fdisk and mdadm creating new partitions to wipe
out sde
Sep 22 15:56:39 teresa kernel: [ 7897.778204] sd 5:0:0:0: [sde] 1465149168
512-byte hardware sectors (750156 MB)
Sep 22 15:56:39 teresa kernel: [ 7897.778204] sd 5:0:0:0: [sde] Write
Protect is off
Sep 22 15:56:39 teresa kernel: [ 7897.778204] sd 5:0:0:0: [sde] Mode
Sense: 00 3a 00 00
Sep 22 15:56:39 teresa kernel: [ 7897.778204] sd 5:0:0:0: [sde] Write
cache: enabled, read cache: enabled, doesn't support DPO or FUA
Sep 22 15:56:39 teresa kernel: [ 7897.778204] sde: sde1 sde2
Sep 22 15:56:41 teresa kernel: [ 7899.848026] sd 5:0:0:0: [sde] 1465149168
512-byte hardware sectors (750156 MB)
Sep 22 15:56:41 teresa kernel: [ 7899.848026] sd 5:0:0:0: [sde] Write
Protect is off
Sep 22 15:56:41 teresa kernel: [ 7899.848026] sd 5:0:0:0: [sde] Mode
Sense: 00 3a 00 00
Sep 22 15:56:41 teresa kernel: [ 7899.848026] sd 5:0:0:0: [sde] Write
cache: enabled, read cache: enabled, doesn't support DPO or FUA
Sep 22 15:56:41 teresa kernel: [ 7899.848026] sde: sde1 sde2
Sep 22 16:01:49 teresa kernel: [ 8207.733821] sd 5:0:0:0: [sde] 1465149168
512-byte hardware sectors (750156 MB)
Sep 22 16:01:49 teresa kernel: [ 8207.733919] sd 5:0:0:0: [sde] Write
Protect is off
Sep 22 16:01:49 teresa kernel: [ 8207.733943] sd 5:0:0:0: [sde] Mode
Sense: 00 3a 00 00
Sep 22 16:01:49 teresa kernel: [ 8207.734039] sd 5:0:0:0: [sde] Write
cache: enabled, read cache: enabled, doesn't support DPO or FUA
Sep 22 16:01:49 teresa kernel: [ 8207.734083] sde: sde1
Sep 22 16:01:51 teresa kernel: [ 8209.777260] sd 5:0:0:0: [sde] 1465149168
512-byte hardware sectors (750156 MB)
Sep 22 16:01:51 teresa kernel: [ 8209.777260] sd 5:0:0:0: [sde] Write
Protect is off
Sep 22 16:01:51 teresa kernel: [ 8209.777260] sd 5:0:0:0: [sde] Mode
Sense: 00 3a 00 00
Sep 22 16:01:51 teresa kernel: [ 8209.777260] sd 5:0:0:0: [sde] Write
cache: enabled, read cache: enabled, doesn't support DPO or FUA
Sep 22 16:01:51 teresa kernel: [ 8209.777260] sde: sde1
Sep 22 16:02:09 teresa mdadm[2694]: DeviceDisappeared event detected on md
device /dev/md3
Sep 22 16:02:09 teresa kernel: [ 8227.781860] md: md3 stopped.
Sep 22 16:02:09 teresa kernel: [ 8227.781908] md: unbind<hde1>
Sep 22 16:02:09 teresa kernel: [ 8227.781937] md: export_rdev(hde1)
Sep 22 16:02:09 teresa kernel: [ 8227.782261] md: unbind<hdg1>
Sep 22 16:02:09 teresa kernel: [ 8227.782292] md: export_rdev(hdg1)
Sep 22 16:02:09 teresa kernel: [ 8227.782561] md: unbind<hdk1>
Sep 22 16:02:09 teresa kernel: [ 8227.782590] md: export_rdev(hdk1)
Sep 22 16:02:09 teresa kernel: [ 8227.782855] md: unbind<hdi1>
Sep 22 16:02:09 teresa kernel: [ 8227.782885] md: export_rdev(hdi1)
Sep 22 16:15:32 teresa smartd[2657]: Device: /dev/hda, Failed SMART usage
Attribute: 194 Temperature_Celsius.
Sep 22 16:15:33 teresa smartd[2657]: Device: /dev/hdk, SMART Usage
Attribute: 194 Temperature_Celsius changed from 110 to 111
Sep 22 16:15:33 teresa smartd[2657]: Device: /dev/sdb, SMART Usage
Attribute: 194 Temperature_Celsius changed from 113 to 116
Sep 22 16:15:33 teresa smartd[2657]: Device: /dev/sdc, SMART Usage
Attribute: 190 Airflow_Temperature_Cel changed from 52 to 51
Sep 22 16:17:01 teresa /USR/SBIN/CRON[2965]: (root) CMD ( cd / &&
run-parts --report /etc/cron.hourly)
Sep 22 16:18:42 teresa kernel: [ 9220.400915] md: md3 stopped.
Sep 22 16:18:42 teresa kernel: [ 9220.411525] md: bind<hdi1>
Sep 22 16:18:42 teresa kernel: [ 9220.411884] md: bind<sde1>
Sep 22 16:18:42 teresa kernel: [ 9220.412577] md: bind<hdk1>
Sep 22 16:18:42 teresa kernel: [ 9220.413162] md: bind<hdg1>
Sep 22 16:18:42 teresa kernel: [ 9220.413750] md: bind<hde1>
Sep 22 16:18:42 teresa kernel: [ 9220.413855] md: kicking non-fresh sde1
from array!
Sep 22 16:18:42 teresa kernel: [ 9220.413887] md: unbind<sde1>
Sep 22 16:18:42 teresa kernel: [ 9220.413915] md: export_rdev(sde1)
Sep 22 16:18:42 teresa kernel: [ 9220.477393] raid5: device hde1
operational as raid disk 0
Sep 22 16:18:42 teresa kernel: [ 9220.477420] raid5: device hdg1
operational as raid disk 4
Sep 22 16:18:42 teresa kernel: [ 9220.477438] raid5: device hdk1
operational as raid disk 3
Sep 22 16:18:42 teresa kernel: [ 9220.477456] raid5: device hdi1
operational as raid disk 1
Sep 22 16:18:42 teresa kernel: [ 9220.478236] raid5: allocated 5252kB for md3
Sep 22 16:18:42 teresa kernel: [ 9220.478265] raid5: raid level 5 set md3
active with 4 out of 5 devices, algorithm 2
Sep 22 16:18:42 teresa kernel: [ 9220.478294] RAID5 conf printout:
Sep 22 16:18:42 teresa kernel: [ 9220.478309] --- rd:5 wd:4
Sep 22 16:18:42 teresa kernel: [ 9220.478324] disk 0, o:1, dev:hde1
Sep 22 16:18:42 teresa kernel: [ 9220.478339] disk 1, o:1, dev:hdi1
Sep 22 16:18:42 teresa kernel: [ 9220.478354] disk 3, o:1, dev:hdk1
Sep 22 16:18:42 teresa kernel: [ 9220.478369] disk 4, o:1, dev:hdg1
# Me stopping md3
Sep 22 16:18:53 teresa mdadm[2694]: DeviceDisappeared event detected on md
device /dev/md3
Sep 22 16:18:53 teresa kernel: [ 9231.572348] md: md3 stopped.
Sep 22 16:18:53 teresa kernel: [ 9231.572394] md: unbind<hde1>
Sep 22 16:18:53 teresa kernel: [ 9231.572423] md: export_rdev(hde1)
Sep 22 16:18:53 teresa kernel: [ 9231.572728] md: unbind<hdg1>
Sep 22 16:18:53 teresa kernel: [ 9231.572758] md: export_rdev(hdg1)
Sep 22 16:18:53 teresa kernel: [ 9231.572988] md: unbind<hdk1>
Sep 22 16:18:53 teresa kernel: [ 9231.573015] md: export_rdev(hdk1)
Sep 22 16:18:53 teresa kernel: [ 9231.573243] md: unbind<hdi1>
Sep 22 16:18:53 teresa kernel: [ 9231.573270] md: export_rdev(hdi1)
# Me creating md3 with sde1 missing
Sep 22 16:19:51 teresa kernel: [ 9289.621646] md: bind<hde1>
Sep 22 16:19:51 teresa kernel: [ 9289.665268] md: bind<hdi1>
Sep 22 16:19:51 teresa kernel: [ 9289.695676] md: bind<hdk1>
Sep 22 16:19:51 teresa kernel: [ 9289.726906] md: bind<hdg1>
Sep 22 16:19:51 teresa kernel: [ 9289.809030] raid5: device hdg1
operational as raid disk 4
Sep 22 16:19:51 teresa kernel: [ 9289.809057] raid5: device hdk1
operational as raid disk 3
Sep 22 16:19:51 teresa kernel: [ 9289.809075] raid5: device hdi1
operational as raid disk 1
Sep 22 16:19:51 teresa kernel: [ 9289.809093] raid5: device hde1
operational as raid disk 0
Sep 22 16:19:51 teresa kernel: [ 9289.809821] raid5: allocated 5252kB for md3
Sep 22 16:19:51 teresa kernel: [ 9289.809850] raid5: raid level 5 set md3
active with 4 out of 5 devices, algorithm 2
Sep 22 16:19:51 teresa kernel: [ 9289.809877] RAID5 conf printout:
Sep 22 16:19:51 teresa kernel: [ 9289.809891] --- rd:5 wd:4
Sep 22 16:19:51 teresa kernel: [ 9289.809907] disk 0, o:1, dev:hde1
Sep 22 16:19:51 teresa kernel: [ 9289.809922] disk 1, o:1, dev:hdi1
Sep 22 16:19:51 teresa kernel: [ 9289.809937] disk 3, o:1, dev:hdk1
Sep 22 16:19:51 teresa kernel: [ 9289.809953] disk 4, o:1, dev:hdg1
Sep 22 16:20:20 teresa kernel: [ 9318.486512] kjournald starting. Commit
interval 5 seconds
Sep 22 16:20:20 teresa kernel: [ 9318.486512] EXT3-fs: mounted filesystem
with ordered data mode.
# Me stopping md3 again
Sep 22 16:20:42 teresa mdadm[2694]: DeviceDisappeared event detected on md
device /dev/md3
Sep 22 16:20:42 teresa kernel: [ 9340.300590] md: md3 stopped.
Sep 22 16:20:42 teresa kernel: [ 9340.300639] md: unbind<hdg1>
Sep 22 16:20:42 teresa kernel: [ 9340.300668] md: export_rdev(hdg1)
Sep 22 16:20:42 teresa kernel: [ 9340.300921] md: unbind<hdk1>
Sep 22 16:20:42 teresa kernel: [ 9340.300950] md: export_rdev(hdk1)
Sep 22 16:20:42 teresa kernel: [ 9340.301183] md: unbind<hdi1>
Sep 22 16:20:42 teresa kernel: [ 9340.301211] md: export_rdev(hdi1)
Sep 22 16:20:42 teresa kernel: [ 9340.301438] md: unbind<hde1>
Sep 22 16:20:42 teresa kernel: [ 9340.301465] md: export_rdev(hde1)
# This is me doing the fatal create, that recovers the wrong disk
Sep 22 16:21:39 teresa kernel: [ 9397.609864] md: bind<hde1>
Sep 22 16:21:39 teresa kernel: [ 9397.652426] md: bind<hdi1>
Sep 22 16:21:39 teresa kernel: [ 9397.673203] md: bind<sde1>
Sep 22 16:21:39 teresa kernel: [ 9397.699373] md: bind<hdk1>
Sep 22 16:21:39 teresa kernel: [ 9397.739372] md: bind<hdg1>
Sep 22 16:21:39 teresa kernel: [ 9397.801729] raid5: device hdk1
operational as raid disk 3
Sep 22 16:21:39 teresa kernel: [ 9397.801756] raid5: device sde1
operational as raid disk 2
Sep 22 16:21:39 teresa kernel: [ 9397.801774] raid5: device hdi1
operational as raid disk 1
Sep 22 16:21:39 teresa kernel: [ 9397.801793] raid5: device hde1
operational as raid disk 0
Sep 22 16:21:39 teresa kernel: [ 9397.802531] raid5: allocated 5252kB for md3
Sep 22 16:21:39 teresa kernel: [ 9397.802559] raid5: raid level 5 set md3
active with 4 out of 5 devices, algorithm 2
Sep 22 16:21:39 teresa kernel: [ 9397.802586] RAID5 conf printout:
Sep 22 16:21:39 teresa kernel: [ 9397.802600] --- rd:5 wd:4
Sep 22 16:21:39 teresa kernel: [ 9397.802615] disk 0, o:1, dev:hde1
Sep 22 16:21:39 teresa kernel: [ 9397.802631] disk 1, o:1, dev:hdi1
Sep 22 16:21:39 teresa kernel: [ 9397.802646] disk 2, o:1, dev:sde1
Sep 22 16:21:39 teresa kernel: [ 9397.802661] disk 3, o:1, dev:hdk1
Sep 22 16:21:39 teresa kernel: [ 9397.838429] RAID5 conf printout:
Sep 22 16:21:39 teresa kernel: [ 9397.838454] --- rd:5 wd:4
Sep 22 16:21:39 teresa kernel: [ 9397.838471] disk 0, o:1, dev:hde1
Sep 22 16:21:39 teresa kernel: [ 9397.838486] disk 1, o:1, dev:hdi1
Sep 22 16:21:39 teresa kernel: [ 9397.838502] disk 2, o:1, dev:sde1
Sep 22 16:21:39 teresa kernel: [ 9397.838518] disk 3, o:1, dev:hdk1
Sep 22 16:21:39 teresa kernel: [ 9397.838533] disk 4, o:1, dev:hdg1
Sep 22 16:21:39 teresa mdadm[2694]: RebuildStarted event detected on md
device /dev/md3
Sep 22 16:21:39 teresa kernel: [ 9397.841822] md: recovery of RAID array md3
Sep 22 16:21:39 teresa kernel: [ 9397.841848] md: minimum _guaranteed_
speed: 1000 KB/sec/disk.
Sep 22 16:21:39 teresa kernel: [ 9397.841868] md: using maximum available
idle IO bandwidth (but not more than 200000 KB/sec) for recovery.
Sep 22 16:21:39 teresa kernel: [ 9397.841908] md: using 128k window, over
a total of 732571904 blocks.
Sep 22 16:22:33 teresa kernel: [ 9451.640192] EXT3-fs error (device md3):
ext3_check_descriptors: Block bitmap for group 3968 not in group (block
0)!
Sep 22 16:22:33 teresa kernel: [ 9451.750241] EXT3-fs: group descriptors
corrupted!
Sep 22 16:22:39 teresa kernel: [ 9458.079151] md: md_do_sync() got signal
... exiting
Sep 22 16:22:39 teresa kernel: [ 9458.114590] md: md3 stopped.
Sep 22 16:22:39 teresa kernel: [ 9458.114590] md: unbind<hdg1>
Sep 22 16:22:39 teresa kernel: [ 9458.114590] md: export_rdev(hdg1)
Sep 22 16:22:39 teresa kernel: [ 9458.114590] md: unbind<hdk1>
Sep 22 16:22:39 teresa kernel: [ 9458.114590] md: export_rdev(hdk1)
Sep 22 16:22:39 teresa kernel: [ 9458.114590] md: unbind<sde1>
Sep 22 16:22:39 teresa kernel: [ 9458.114590] md: export_rdev(sde1)
Sep 22 16:22:39 teresa kernel: [ 9458.114590] md: unbind<hdi1>
Sep 22 16:22:39 teresa kernel: [ 9458.114590] md: export_rdev(hdi1)
Sep 22 16:22:39 teresa kernel: [ 9458.114590] md: unbind<hde1>
Sep 22 16:22:39 teresa kernel: [ 9458.114590] md: export_rdev(hde1)
Sep 22 16:22:39 teresa mdadm[2694]: DeviceDisappeared event detected on md
device /dev/md3
# Me trying to recreate md3 without sde
Sep 22 16:23:50 teresa kernel: [ 9529.065477] md: bind<hde1>
Sep 22 16:23:50 teresa kernel: [ 9529.107767] md: bind<hdi1>
Sep 22 16:23:50 teresa kernel: [ 9529.137743] md: bind<hdk1>
Sep 22 16:23:50 teresa kernel: [ 9529.177990] md: bind<hdg1>
Sep 22 16:23:51 teresa mdadm[2694]: RebuildFinished event detected on md
device /dev/md3
Sep 22 16:23:51 teresa kernel: [ 9529.240814] raid5: device hdg1
operational as raid disk 4
Sep 22 16:23:51 teresa kernel: [ 9529.241734] raid5: device hdk1
operational as raid disk 3
Sep 22 16:23:51 teresa kernel: [ 9529.241752] raid5: device hdi1
operational as raid disk 1
Sep 22 16:23:51 teresa kernel: [ 9529.241770] raid5: device hde1
operational as raid disk 0
Sep 22 16:23:51 teresa kernel: [ 9529.242520] raid5: allocated 5252kB for md3
Sep 22 16:23:51 teresa kernel: [ 9529.242547] raid5: raid level 5 set md3
active with 4 out of 5 devices, algorithm 2
Sep 22 16:23:51 teresa kernel: [ 9529.242574] RAID5 conf printout:
Sep 22 16:23:51 teresa kernel: [ 9529.242588] --- rd:5 wd:4
Sep 22 16:23:51 teresa kernel: [ 9529.242603] disk 0, o:1, dev:hde1
Sep 22 16:23:51 teresa kernel: [ 9529.242618] disk 1, o:1, dev:hdi1
Sep 22 16:23:51 teresa kernel: [ 9529.242633] disk 3, o:1, dev:hdk1
Sep 22 16:23:51 teresa kernel: [ 9529.242649] disk 4, o:1, dev:hdg1
# And me trying a fsck -n or a mount
Sep 22 16:24:07 teresa kernel: [ 9545.326343] EXT3-fs error (device md3):
ext3_check_descriptors: Block bitmap for group 3968 not in group (block
0)!
Sep 22 16:24:07 teresa kernel: [ 9545.369071] EXT3-fs: group descriptors
corrupted!
### EXAMINES OF PARTITIONS ###
=== --examine /dev/hde1 ===
/dev/hde1:
Magic : a92b4efc
Version : 00.90.00
UUID : ed1e6357:74e32684:47f7b12e:9c2b2218 (local to host teresa)
Creation Time : Thu Sep 22 16:23:50 2011
Raid Level : raid5
Used Dev Size : 732571904 (698.64 GiB 750.15 GB)
Array Size : 2930287616 (2794.54 GiB 3000.61 GB)
Raid Devices : 5
Total Devices : 4
Preferred Minor : 3
Update Time : Sun Sep 25 22:11:22 2011
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 1
Spare Devices : 0
Checksum : b7f6a3c0 - correct
Events : 10
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 0 33 1 0 active sync /dev/hde1
0 0 33 1 0 active sync /dev/hde1
1 1 56 1 1 active sync /dev/hdi1
2 2 0 0 2 faulty removed
3 3 57 1 3 active sync /dev/hdk1
4 4 34 1 4 active sync /dev/hdg1
=== --examine /dev/hdi1 ===
/dev/hdi1:
Magic : a92b4efc
Version : 00.90.00
UUID : ed1e6357:74e32684:47f7b12e:9c2b2218 (local to host teresa)
Creation Time : Thu Sep 22 16:23:50 2011
Raid Level : raid5
Used Dev Size : 732571904 (698.64 GiB 750.15 GB)
Array Size : 2930287616 (2794.54 GiB 3000.61 GB)
Raid Devices : 5
Total Devices : 4
Preferred Minor : 3
Update Time : Sun Sep 25 22:11:22 2011
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 1
Spare Devices : 0
Checksum : b7f6a3d9 - correct
Events : 10
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 1 56 1 1 active sync /dev/hdi1
0 0 33 1 0 active sync /dev/hde1
1 1 56 1 1 active sync /dev/hdi1
2 2 0 0 2 faulty removed
3 3 57 1 3 active sync /dev/hdk1
4 4 34 1 4 active sync /dev/hdg1
=== --examine /dev/sde1 ===
/dev/sde1:
Magic : a92b4efc
Version : 00.90.00
UUID : e6e3df36:1195239f:47f7b12e:9c2b2218 (local to host teresa)
Creation Time : Thu Sep 22 16:21:39 2011
Raid Level : raid5
Used Dev Size : 732571904 (698.64 GiB 750.15 GB)
Array Size : 2930287616 (2794.54 GiB 3000.61 GB)
Raid Devices : 5
Total Devices : 5
Preferred Minor : 3
Update Time : Thu Sep 22 16:22:39 2011
State : clean
Active Devices : 4
Working Devices : 5
Failed Devices : 1
Spare Devices : 1
Checksum : 4e69d679 - correct
Events : 8
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 2 8 65 2 active sync /dev/sde1
0 0 33 1 0 active sync /dev/hde1
1 1 56 1 1 active sync /dev/hdi1
2 2 8 65 2 active sync /dev/sde1
3 3 57 1 3 active sync /dev/hdk1
4 4 0 0 4 faulty removed
5 5 34 1 5 spare /dev/hdg1
=== --examine /dev/hdk1 ===
/dev/hdk1:
Magic : a92b4efc
Version : 00.90.00
UUID : ed1e6357:74e32684:47f7b12e:9c2b2218 (local to host teresa)
Creation Time : Thu Sep 22 16:23:50 2011
Raid Level : raid5
Used Dev Size : 732571904 (698.64 GiB 750.15 GB)
Array Size : 2930287616 (2794.54 GiB 3000.61 GB)
Raid Devices : 5
Total Devices : 4
Preferred Minor : 3
Update Time : Sun Sep 25 22:11:22 2011
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 1
Spare Devices : 0
Checksum : b7f6a3de - correct
Events : 10
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 3 57 1 3 active sync /dev/hdk1
0 0 33 1 0 active sync /dev/hde1
1 1 56 1 1 active sync /dev/hdi1
2 2 0 0 2 faulty removed
3 3 57 1 3 active sync /dev/hdk1
4 4 34 1 4 active sync /dev/hdg1
=== --examine /dev/hdg1 ===
/dev/hdg1:
Magic : a92b4efc
Version : 00.90.00
UUID : ed1e6357:74e32684:47f7b12e:9c2b2218 (local to host teresa)
Creation Time : Thu Sep 22 16:23:50 2011
Raid Level : raid5
Used Dev Size : 732571904 (698.64 GiB 750.15 GB)
Array Size : 2930287616 (2794.54 GiB 3000.61 GB)
Raid Devices : 5
Total Devices : 4
Preferred Minor : 3
Update Time : Sun Sep 25 22:11:22 2011
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 1
Spare Devices : 0
Checksum : b7f6a3c9 - correct
Events : 10
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 4 34 1 4 active sync /dev/hdg1
0 0 33 1 0 active sync /dev/hde1
1 1 56 1 1 active sync /dev/hdi1
2 2 0 0 2 faulty removed
3 3 57 1 3 active sync /dev/hdk1
4 4 34 1 4 active sync /dev/hdg1
>
>
>>
>> (2) Can I suggest improvements into resilvering? Can I contribute code
>> to
>> implement them? Such as resilver from the end of the drive back to the
>> front, so if you notice the wrong drive resilvering, you can stop and
>> not
>> lose the MBR and the directory format structure that's stored in the
>> first
>> few sectors? I'd also like to take a look at adding a raid mode where
>> there's checksum in every stripe block so the system can detect
>> corrupted
>> disks and not resilver. I'd also like to add a raid option where a
>> resilvering need will be reported by email and needs to be started
>> manually. All to prevent what happened to me from happening again.
>>
>> Thanks for your time.
>>
>> Kenn Frank
>>
>> P.S. Setup:
>>
>> # uname -a
>> Linux teresa 2.6.26-2-686 #1 SMP Sat Jun 11 14:54:10 UTC 2011 i686
>> GNU/Linux
>>
>> # mdadm --version
>> mdadm - v2.6.7.2 - 14th November 2008
>>
>> # mdadm --detail /dev/md3
>> /dev/md3:
>> Version : 00.90
>> Creation Time : Thu Sep 22 16:23:50 2011
>> Raid Level : raid5
>> Array Size : 2930287616 (2794.54 GiB 3000.61 GB)
>> Used Dev Size : 732571904 (698.64 GiB 750.15 GB)
>> Raid Devices : 5
>> Total Devices : 4
>> Preferred Minor : 3
>> Persistence : Superblock is persistent
>>
>> Update Time : Thu Sep 22 20:19:09 2011
>> State : clean, degraded
>> Active Devices : 4
>> Working Devices : 4
>> Failed Devices : 0
>> Spare Devices : 0
>>
>> Layout : left-symmetric
>> Chunk Size : 64K
>>
>> UUID : ed1e6357:74e32684:47f7b12e:9c2b2218 (local to host
>> teresa)
>> Events : 0.6
>>
>> Number Major Minor RaidDevice State
>> 0 33 1 0 active sync /dev/hde1
>> 1 56 1 1 active sync /dev/hdi1
>> 2 0 0 2 removed
>> 3 57 1 3 active sync /dev/hdk1
>> 4 34 1 4 active sync /dev/hdg1
>>
>>
>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
