我目前正在重建一个 RAID6 MDADM 阵列，从 5 个设备到 9 个设备。
cat /proc/mdstat：
Personalities : [raid6] [raid5] [raid4]
md0 : active raid6 sde1[0] sdg1[9](F) sdh1[8](F) sdi1[6](F) sdj1[7](F) sdd1[4] sdc1[3] sdb1[5] sdf1[1]
2926751232 blocks super 1.2 level 6, 512k chunk, algorithm 2 [9/5] [UUUUU____]
[>....................] reshape = 0.0% (112640/975583744) finish=142795.3min speed=113K/sec
unused devices: <none>
mdadm --detail /dev/md0：
/dev/md0:
Version : 1.2
Creation Time : Sun Apr 8 18:20:33 2012
Raid Level : raid6
Array Size : 2926751232 (2791.17 GiB 2996.99 GB)
Used Dev Size : 975583744 (930.39 GiB 999.00 GB)
Raid Devices : 9
Total Devices : 9
Persistence : Superblock is persistent
Update Time : Tue Dec 3 08:34:44 2013
State : active, FAILED, reshaping
Active Devices : 5
Working Devices : 5
Failed Devices : 4
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Reshape Status : 0% complete
Delta Devices : 4, (5->9)
Name : ares:0 (local to host ares)
UUID : 97b392d0:28dc5cc5:29ca9911:24cefb6b
Events : 7020
Number Major Minor RaidDevice State
0 8 65 0 active sync /dev/sde1
1 8 81 1 active sync /dev/sdf1
5 8 17 2 active sync /dev/sdb1
3 8 33 3 active sync /dev/sdc1
4 8 49 4 active sync /dev/sdd1
9 8 97 5 faulty spare rebuilding /dev/sdg1
8 8 113 6 faulty spare rebuilding /dev/sdh1
6 8 129 7 faulty spare rebuilding /dev/sdi1
7 8 145 8 faulty spare rebuilding /dev/sdj1
现在它显示我的新设备有故障。我是否应该担心它正在构建一个不可用的阵列？
答案1
以下是重建 raid 阵列需要遵循的步骤：首先，删除标记为“故障备用重建”的分区。使用 fdisk 创建新的 raid 分区
然后执行以下命令
mdadm --manage /dev/md0 --add /dev/sdg1
mdadm --manage /dev/md0 --add /dev/sdh1
mdadm --manage /dev/md0 --add /dev/sdi1
mdadm --manage /dev/md0 --add /dev/sdj1
监控重建过程cat /proc/mdstat