mdadm私はRAIDアレイを管理するために長年webminを使用してきましたが、端末でこれらのコマンドを使用する理由はありませんでした。
ただし、数日前に6台のドライブRAID6アレイにディスクを追加しましたが、再構成は行われませんでした。コンピュータを再起動すると問題が解決することがわかりましたが、再起動すると大きな問題が発生しました。
再起動後にアレイがクリーンになっても、/ dev / md3からアレイを起動できません。コマンドと添付のwebminスクリーンショットを参照してください。
250:~ # cat /etc/os-release
NAME="openSUSE Tumbleweed"
# VERSION="20161112"
ID=opensuse
ID_LIKE="suse"
VERSION_ID="20161112"
PRETTY_NAME="openSUSE Tumbleweed"
ANSI_COLOR="0;32"
CPE_NAME="cpe:/o:opensuse:tumbleweed:20161112"
BUG_REPORT_URL="https://bugs.opensuse.org"
HOME_URL="https://www.opensuse.org/"
250:~ # uname -a
Linux 250 4.8.6-2-default #1 SMP PREEMPT Thu Nov 3 13:00:34 UTC 2016 (1d89b44) x86_64 x86_64 x86_64 GNU/Linux
250:~ # rpm -q webmin
webmin-1.820-1.noarch
250:~ # mdadm -V
mdadm - v3.4 - 28th January 2016
250:~ # cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md127 : active raid6 sdi2[7] sdf2[4] sdc2[2] sdb2[0] sda2[1] sdd2[5] sdg2[6]
5119360 blocks super 1.0 level 6, 128k chunk, algorithm 2 [7/7] [UUUUUUU]
bitmap: 0/1 pages [0KB], 65536KB chunk
md1 : active raid6 sdc3[2] sdf3[5] sda3[1] sdb3[3] sdd3[4] sdi3[6] sdg3[0]
153599360 blocks super 1.0 level 6, 128k chunk, algorithm 2 [7/7] [UUUUUUU]
bitmap: 0/1 pages [0KB], 65536KB chunk
md3 : inactive sdi4[7] sdf4[4] sdd4[5] sdb4[0] sdc4[2] sda4[1] sdg4[6]
3103718444 blocks super 1.0
md0 : active raid6 sdf6[5] sdc6[2] sdb6[4] sda6[1] sdi6[8] sdd6[6] sdg6[7]
7149870080 blocks super 1.2 level 6, 512k chunk, algorithm 2 [7/7] [UUUUUUU]
bitmap: 0/11 pages [0KB], 65536KB chunk
md2 : active raid6 sdb5[0] sdc5[2] sdd5[5] sda5[1] sdi5[7] sdf5[4] sdg5[6]
5119993600 blocks super 1.0 level 6, 128k chunk, algorithm 2 [7/7] [UUUUUUU]
bitmap: 0/8 pages [0KB], 65536KB chunk
unused devices: <none>
250:~ # mdadm -D /dev/md3
/dev/md3:
Version : 1.0
Creation Time : Sat Dec 12 07:16:21 2015
Raid Level : raid6
Used Dev Size : 443387648 (422.85 GiB 454.03 GB)
Raid Devices : 7
Total Devices : 7
Persistence : Superblock is persistent
Update Time : Thu Nov 17 14:17:34 2016
State : active, Not Started
Active Devices : 7
Working Devices : 7
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 128K
Delta Devices : 1, (6->7)
Name : any:3
UUID : 51cc1190:dc4821a5:c1161e00:b73e02ec
Events : 139752
Number Major Minor RaidDevice State
0 8 20 0 active sync /dev/sdb4
1 8 4 1 active sync /dev/sda4
2 8 36 2 active sync /dev/sdc4
4 8 84 3 active sync /dev/sdf4
6 8 100 4 active sync /dev/sdg4
5 8 52 5 active sync /dev/sdd4
7 8 132 6 active sync /dev/sdi4
250:~ # mdadm -E /dev/sd[abcdfgi]4
/dev/sda4:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x5
Array UUID : 51cc1190:dc4821a5:c1161e00:b73e02ec
Name : any:3
Creation Time : Sat Dec 12 07:16:21 2015
Raid Level : raid6
Raid Devices : 7
Avail Dev Size : 886775528 (422.85 GiB 454.03 GB)
Array Size : 2216938240 (2114.24 GiB 2270.14 GB)
Used Dev Size : 886775296 (422.85 GiB 454.03 GB)
Super Offset : 886775792 sectors
Unused Space : before=0 sectors, after=480 sectors
State : clean
Device UUID : 92f5e8d6:4e55facc:5446de77:ee298eee
Internal Bitmap : -16 sectors from superblock
Reshape pos'n : 0
Delta Devices : 1 (6->7)
Update Time : Thu Nov 17 14:17:34 2016
Bad Block Log : 512 entries available at offset -8 sectors
Checksum : 5c4a0af8 - correct
Events : 139752
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 1
Array State : AAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdb4:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x5
Array UUID : 51cc1190:dc4821a5:c1161e00:b73e02ec
Name : any:3
Creation Time : Sat Dec 12 07:16:21 2015
Raid Level : raid6
Raid Devices : 7
Avail Dev Size : 886775528 (422.85 GiB 454.03 GB)
Array Size : 2216938240 (2114.24 GiB 2270.14 GB)
Used Dev Size : 886775296 (422.85 GiB 454.03 GB)
Super Offset : 886775792 sectors
Unused Space : before=0 sectors, after=480 sectors
State : clean
Device UUID : b36bd7a1:ec792d23:51c0e852:e9ba91b5
Internal Bitmap : -16 sectors from superblock
Reshape pos'n : 0
Delta Devices : 1 (6->7)
Update Time : Thu Nov 17 14:17:34 2016
Bad Block Log : 512 entries available at offset -8 sectors
Checksum : 1f79aeed - correct
Events : 139752
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 0
Array State : AAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdc4:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x5
Array UUID : 51cc1190:dc4821a5:c1161e00:b73e02ec
Name : any:3
Creation Time : Sat Dec 12 07:16:21 2015
Raid Level : raid6
Raid Devices : 7
Avail Dev Size : 886783720 (422.85 GiB 454.03 GB)
Array Size : 2216938240 (2114.24 GiB 2270.14 GB)
Used Dev Size : 886775296 (422.85 GiB 454.03 GB)
Super Offset : 886783984 sectors
Unused Space : before=0 sectors, after=8672 sectors
State : clean
Device UUID : ab40e58e:724de1e3:e502ccf0:831a93cd
Internal Bitmap : -16 sectors from superblock
Reshape pos'n : 0
Delta Devices : 1 (6->7)
Update Time : Thu Nov 17 14:17:34 2016
Bad Block Log : 512 entries available at offset -8 sectors
Checksum : 8320399c - correct
Events : 139752
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 2
Array State : AAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdd4:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x5
Array UUID : 51cc1190:dc4821a5:c1161e00:b73e02ec
Name : any:3
Creation Time : Sat Dec 12 07:16:21 2015
Raid Level : raid6
Raid Devices : 7
Avail Dev Size : 886775528 (422.85 GiB 454.03 GB)
Array Size : 2216938240 (2114.24 GiB 2270.14 GB)
Used Dev Size : 886775296 (422.85 GiB 454.03 GB)
Super Offset : 886775792 sectors
Unused Space : before=0 sectors, after=480 sectors
State : clean
Device UUID : b0f9f68d:0ad6f39a:50043287:10b0570d
Internal Bitmap : -16 sectors from superblock
Reshape pos'n : 0
Delta Devices : 1 (6->7)
Update Time : Thu Nov 17 14:17:34 2016
Bad Block Log : 512 entries available at offset -8 sectors
Checksum : f6ed233 - correct
Events : 139752
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 5
Array State : AAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdf4:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x5
Array UUID : 51cc1190:dc4821a5:c1161e00:b73e02ec
Name : any:3
Creation Time : Sat Dec 12 07:16:21 2015
Raid Level : raid6
Raid Devices : 7
Avail Dev Size : 886775528 (422.85 GiB 454.03 GB)
Array Size : 2216938240 (2114.24 GiB 2270.14 GB)
Used Dev Size : 886775296 (422.85 GiB 454.03 GB)
Super Offset : 886775792 sectors
Unused Space : before=0 sectors, after=480 sectors
State : clean
Device UUID : c63684ba:59abf1dc:603d3c94:b5efd4b6
Internal Bitmap : -16 sectors from superblock
Reshape pos'n : 0
Delta Devices : 1 (6->7)
Update Time : Thu Nov 17 14:17:34 2016
Bad Block Log : 512 entries available at offset -8 sectors
Checksum : 34815d4d - correct
Events : 139752
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 3
Array State : AAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdg4:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x5
Array UUID : 51cc1190:dc4821a5:c1161e00:b73e02ec
Name : any:3
Creation Time : Sat Dec 12 07:16:21 2015
Raid Level : raid6
Raid Devices : 7
Avail Dev Size : 886775528 (422.85 GiB 454.03 GB)
Array Size : 2216938240 (2114.24 GiB 2270.14 GB)
Used Dev Size : 886775296 (422.85 GiB 454.03 GB)
Super Offset : 886775792 sectors
Unused Space : before=0 sectors, after=480 sectors
State : clean
Device UUID : 9ef6c9e1:5a56c716:4cc8645f:bd92060b
Internal Bitmap : -16 sectors from superblock
Reshape pos'n : 0
Delta Devices : 1 (6->7)
Update Time : Thu Nov 17 14:17:34 2016
Bad Block Log : 512 entries available at offset -8 sectors
Checksum : b4f6f61a - correct
Events : 139752
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 4
Array State : AAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdi4:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x5
Array UUID : 51cc1190:dc4821a5:c1161e00:b73e02ec
Name : any:3
Creation Time : Sat Dec 12 07:16:21 2015
Raid Level : raid6
Raid Devices : 7
Avail Dev Size : 886775528 (422.85 GiB 454.03 GB)
Array Size : 2216938240 (2114.24 GiB 2270.14 GB)
Used Dev Size : 886775296 (422.85 GiB 454.03 GB)
Super Offset : 886775792 sectors
Unused Space : before=0 sectors, after=480 sectors
State : clean
Device UUID : a6046dca:1edf6818:5fe92892:2e3a966f
Internal Bitmap : -16 sectors from superblock
Reshape pos'n : 0
Delta Devices : 1 (6->7)
Update Time : Thu Nov 17 14:17:34 2016
Bad Block Log : 512 entries available at offset -8 sectors
Checksum : 368f556c - correct
Events : 139752
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 6
Array State : AAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
250:~ # mdadm --examine --scan
ARRAY /dev/md/0 metadata=1.2 UUID=ad2e4877:bb799c91:49e20b58:c0866104 name=430:0
ARRAY /dev/md/swap metadata=1.0 UUID=a8f1a9d5:bd89d7db:0764ba4d:5a515066 name=any:swap
ARRAY /dev/md/2 metadata=1.0 UUID=0d675c76:d91e6dd2:b8b89871:5af91fed name=any:2
ARRAY /dev/md/3 metadata=1.0 UUID=51cc1190:dc4821a5:c1161e00:b73e02ec name=any:3
ARRAY /dev/md/0 metadata=1.0 UUID=8cedcb83:66499024:f9d66cca:7e7b367b name=any:0
答え1
mdadmアレイを組み立てるときにアレイのすべての部分が見つからない場合、その使用は自動的には有効になりません。コマンドを使用して手動で有効にできますmdadm --run /dev/md3。読み取り専用モードで起動できます。この場合を使用して読み取り/書き込みモードに切り替えることができますmdadm --readwrite /dev/md3。
これは安全な作業です。データセット全体を保持するのに十分なアレイブロックがない場合（たとえば、RAID6に3つのドライブがない場合、またはRAID10に一致するドライブペアがない場合）、mdadm操作は実行されません。