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标题:
redhat soft RAID overview reference guide
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作者:
shinelian
时间:
2006-07-01 10:47
标题:
redhat soft RAID overview reference guide
mdadm --create /dev/md0 --chunk=64 -l0 -n 2 /dev/sda5 /dev/sda6
mdadm -C /dev/md1 -l1 -n 2 /dev/sda7 /dev/sda8 -x 1 /dev/sda9
mdadm -C /dev/md0 -c 128 -l5 -n 2 /dev/sda5 /dev/sda6 -x 1 /dev/sda7
mdadm --detail /dev/md0
RAID0
[/url]
[root@localhost ~]#
mdadm --stop /dev/md0
mdadm: fail to stop array /dev/md0: Device or resource busy
[root@localhost ~]#
umount /dev/md0
[root@localhost ~]#
mdadm --detail /dev/md0
/dev/md0:
Version : 00.90.01
Creation Time : Tue Jul 4 01:10:49 2006
Raid Level : raid0
Array Size : 208640 (203.75 MiB 213.65 MB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Tue Jul 4 01:10:49 2006
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Chunk Size : 64K
Number Major Minor RaidDevice State
0 8 5 0 active sync /dev/sda5
1 8 6 1 active sync /dev/sda6
UUID : 9a8b7859:803d9470:d09f745b:2a6d4c72
Events : 0.1
[root@localhost ~]#
cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active
raid1 sda9[2] sda8[1] sda7[0]
104320 blocks [2/2] [UU]
md0 : active
raid0 sda6[1] sda5[0]
208640 blocks 64k chunks
unused devices:
[root@localhost ~]#
mdadm --stop /dev/md0
[root@localhost ~]#
cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active
raid1 sda9[2] sda8[1] sda7[0]
104320 blocks [2/2] [UU]
unused devices:
[root@localhost ~]#
mdadm --detail /dev/md0
mdadm: md device /dev/md0 does not appear to be active.
[root@localhost ~]#
RAID 1
[root@localhost ~]#
mdadm --fail /dev/md1 /dev/sda8
mdadm: set /dev/sda8 faulty in /dev/md1
[root@localhost ~]#
cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1 sda9[2] sda8[3](
F
) sda7[0]
104320 blocks [2/1] [U_]
[============>........] recovery = 61.7% (65024/104320) finish=0.0min speed=65024K/sec
unused devices:
[root@localhost ~]#
cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1
sda9[1] sda8[2](F) sda7[0]
104320 blocks [2/2] [UU]
unused devices:
[root@localhost ~]#
mdadm --remove /dev/sda8
mdadm: /dev/sda8 does not appear to be an md device
[root@localhost ~]#
mdadm --remove /dev/md1 /dev/sda8
mdadm: hot removed /dev/sda8
[root@localhost ~]#
cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid1 sda9[1] sda7[0]
104320 blocks [2/2] [UU]
unused devices:
[root@localhost ~]#
mdadm --detail /dev/md1
/dev/md1:
Version : 00.90.01
Creation Time : Tue Jul 4 01:28:00 2006
Raid Level : raid1
Array Size : 104320 (101.88 MiB 106.82 MB)
Device Size : 104320 (101.88 MiB 106.82 MB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 1
Persistence : Superblock is persistent
Update Time : Tue Jul 4 01:55:28 2006
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Number Major Minor RaidDevice State
0 8 7 0 active sync /dev/sda7
1 8 9 1 active sync /dev/sda9
UUID : 43a5d28f:8da05b26:5cdc4a9f:bc67ae7f
Events : 0.7
[root@localhost ~]#
mdadm --add /dev/md1 /dev/sda10
mdadm: hot added /dev/sda10
[root@localhost ~]#
mdadm --detail /dev/md1
/dev/md1:
Version : 00.90.01
Creation Time : Tue Jul 4 01:28:00 2006
Raid Level : raid1
Array Size : 104320 (101.88 MiB 106.82 MB)
Device Size : 104320 (101.88 MiB 106.82 MB)
Raid Devices : 2
Total Devices : 3
Preferred Minor : 1
Persistence : Superblock is persistent
Update Time : Tue Jul 4 01:57:24 2006
State : clean
Active Devices : 2
Working Devices : 3
Failed Devices : 0
Spare Devices : 1
Number Major Minor RaidDevice State
0 8 7 0 active sync /dev/sda7
1 8 9 1 active sync /dev/sda9
2 8 10 -1 spare /dev/sda10
UUID : 43a5d28f:8da05b26:5cdc4a9f:bc67ae7f
Events : 0.8
[root@localhost ~]#
remove RAID
mdadm --stop /dev/md0 /dev/md1
mdadm --zero-superblock /dev/sda[5-10]
[url=http://unthought.net/Software-RAID.HOWTO/Software-RAID.HOWTO.html#toc10]http://unthought.net/Software-RAID.HOWTO/Software-RAID.HOWTO.html#toc10
http://www.devil-linux.org/documentation/1.0.x/ch01s05.html
base on el4
http://kbase.redhat.com/faq/FAQ_80_3656.shtm
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