Hello,
Recently I upgraded to 2Tb disks on one of my servers, I built a new
degraded raid1 array:
mdadm --create /dev/md7 -level 1 --raid-devices=2 missing /dev/sdd1
added its entry to /etc/mdadm/mdadm.conf then I rebooted to add the
second disk and added it to the array:
mdadm --manage /dev/md7 --add /dev/sdb1
I updated /etc/mdadm/mdadm.conf, although I noticed no difference in the
output of:
mdadm --detail --scan
I use a monolithic kernel so there is no ramdisk to regenerate. This is
my first 1.00 array, and the existing 0.9 arrays have never shown this
issue. I have attempted the same process on a test server with no
issues, and I can't really think of what to look at next.
apologies for the long post.
The array I'm having trouble with is md7, I'm on debian lenny
# mdadm -V
mdadm - v2.6.7.2 - 14th November 2008
After boot and a resync:
# cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid10] [multipath] [faulty]
md7 : active raid1 sdb1[2] sdd1[1]
1953511864 blocks super 1.0 [2/2] [UU]
md1 : active raid1 sdc2[1] sda2[0]
497920 blocks [2/2] [UU]
md2 : active raid1 sdc5[1] sda5[0]
3911680 blocks [2/2] [UU]
md3 : active raid1 sdc6[1] sda6[0]
4891648 blocks [2/2] [UU]
md4 : active raid1 sdc7[1] sda7[0]
3911680 blocks [2/2] [UU]
md5 : active raid1 sdc8[1] sda8[0]
276872128 blocks [2/2] [UU]
md0 : active raid1 sdc1[1] sda1[0]
1959808 blocks [2/2] [UU]
unused devices: <none>
# mdadm --detail --scan
ARRAY /dev/md0 level=raid1 num-devices=2 metadata=00.90
UUID=b43f6098:06acab7b:580ff883:3ab60d5b
ARRAY /dev/md5 level=raid1 num-devices=2 metadata=00.90
UUID=eaa425c7:502672ee:dabc9034:1a71332c
ARRAY /dev/md4 level=raid1 num-devices=2 metadata=00.90
UUID=2b48f938:99b2b0e3:519fddc6:1290322f
ARRAY /dev/md3 level=raid1 num-devices=2 metadata=00.90
UUID=ccad63d9:d0b7c626:8348c59b:766a05a5
ARRAY /dev/md2 level=raid1 num-devices=2 metadata=00.90
UUID=bc9c8e72:de7eb7fb:231484db:a9ec47c7
ARRAY /dev/md1 level=raid1 num-devices=2 metadata=00.90
UUID=e047f745:4ba432d8:26e9533e:8c2555b4
ARRAY /dev/md7 level=raid1 num-devices=2 metadata=01.00 name=7
UUID=0ed787fb:7d7c6b5c:82113c0c:b30493e3
# cat /etc/mdadm/mdadm.conf
DEVICE /dev/sda* /deb/sdb* /dev/sdc* /dev/sdd*
CREATE owner=root group=disk mode=0660 auto=yes metadata=1
MAILADDR root
ARRAY /dev/md0 level=raid1 num-devices=2
UUID=b43f6098:06acab7b:580ff883:3ab60d5b
ARRAY /dev/md5 level=raid1 num-devices=2
UUID=eaa425c7:502672ee:dabc9034:1a71332c
ARRAY /dev/md4 level=raid1 num-devices=2
UUID=2b48f938:99b2b0e3:519fddc6:1290322f
ARRAY /dev/md3 level=raid1 num-devices=2
UUID=ccad63d9:d0b7c626:8348c59b:766a05a5
ARRAY /dev/md2 level=raid1 num-devices=2
UUID=bc9c8e72:de7eb7fb:231484db:a9ec47c7
ARRAY /dev/md1 level=raid1 num-devices=2
UUID=e047f745:4ba432d8:26e9533e:8c2555b4
ARRAY /dev/md7 level=raid1 num-devices=2 metadata=1.0 name=7
UUID=0ed787fb:7d7c6b5c:82113c0c:b30493e3
# mdadm -E /dev/sdb1
/dev/sdb1:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x0
Array UUID : 0ed787fb:7d7c6b5c:82113c0c:b30493e3
Name : 7
Creation Time : Fri Jun 4 12:19:54 2010
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 3907023728 (1863.01 GiB 2000.40 GB)
Array Size : 3907023728 (1863.01 GiB 2000.40 GB)
Super Offset : 3907023984 sectors
State : clean
Device UUID : 99055997:7584cb3c:12f75ae1:dbbc5dfa
Update Time : Thu Jun 17 10:52:58 2010
Checksum : f3904db3 - correct
Events : 10260
Array Slot : 2 (failed, 1, 0)
Array State : Uu 1 failed
# mdadm -E /dev/sdd1
/dev/sdd1:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x0
Array UUID : 0ed787fb:7d7c6b5c:82113c0c:b30493e3
Name : 7
Creation Time : Fri Jun 4 12:19:54 2010
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 3907023728 (1863.01 GiB 2000.40 GB)
Array Size : 3907023728 (1863.01 GiB 2000.40 GB)
Super Offset : 3907023984 sectors
State : clean
Device UUID : b5defada:b9882124:28febea7:7775802f
Update Time : Thu Jun 17 10:52:58 2010
Checksum : 1a0eeac4 - correct
Events : 10260
Array Slot : 1 (failed, 1, 0)
Array State : uU 1 failed
# fdisk -l /dev/sdb
Disk /dev/sdb: 2000.3 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x4bf7ec5a
Device Boot Start End Blocks Id System
/dev/sdb1 1 243201 1953512001 da Non-FS data
# fdisk -l /dev/sdd
Disk /dev/sdd: 2000.3 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x81e47a11
Device Boot Start End Blocks Id System
/dev/sdd1 1 243201 1953512001 da Non-FS data
buildstore:~#
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