硬體控制的RAID1,系統如何查看? - Linux

公司的HP-Z210拿來做server,裝CentOS,兩顆硬碟做RAID1
前幾天安裝完系統開機訊息是這樣的:

RAID Volumes:
ID Name Level Strip Size Status Bootabl
0 Volume0 RAID1(Mirror) N/A 233.8GB Initialize Yes

Physical Devices:
Port Device Model Serial # Size Type/Status(Vol ID)
0 Maxtor 6V250F0 V592283G 233.7GB Member Disk(0)
1 Maxtor 6V250F0 V503KSXG 233.7GB Member Disk(0)

現在是這樣的:

RAID Volumes:
ID Name Level Strip Size Status Bootabl
0 Volume0 RAID1(Mirror) N/A 233.8GB Degraded Yes

Physical Devices:
Port Device Model Serial # Size Type/Status(Vol ID)
0 Maxtor 6V250F0 V592283G 233.7GB Member Disk(0)
1 Maxtor 6V250F0 V503KSXG 233.7GB Spare Disk

這樣的訊息是代表什麼???
再來 mdadm --detail /dev/md127 觀察是這樣的:

/dev/md127:
Container : /dev/md0, member 0
Raid Level : raid1
Array Size : 245114880 (233.76 GiB 251.00 GB)
Used Dev Size : 245115012 (233.76 Gib 251.00 GB)
Raid Devices : 2
Total Devices : 1

State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0

UUID : c5e4e272:73329def:8dc9fd9d:b8991b6e
Number Major Minor RaidDevice State
0 8 0 0 active sync /dev/sd1
1 0 0 1 removed

接著 cat /proc/mdstat 觀察是這樣的:

Personalities : [raid1]
md126 : inactive sdb[0](S)
1105 blocks super external:imsm

md127 : active raid1 sda[0]
245114880 blocks super external:/md0/0 [2/1] [U_]

md0 : inactive sda[0](S)
2364 blocks super external:imsm

unused devices: <none>


照上面的訊息顯示,我現在的raid 1究竟是有沒有正常運作(兩硬碟同步)?
麻煩各位了! thx~

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