我用 RAID5 替换了 QNAP TS-419U + 上的 1 号硬盘。这是无需关闭机器的热插拔替换。新硬盘很好，但未添加到 Raid 5。
cat /proc/mdstat
Personalities : [raid1] [linear] [raid0] [raid10] [raid6] [raid5] [raid4]
md0 : active raid5 sdd3[3] sdc3[2] sdb3[1]
5855836800 blocks level 5, 64k chunk, algorithm 2 [4/3] [_UUU]
md4 : active raid1 sdd2[0] sdc2[2](S) sdb2[1]
530048 blocks [2/2] [UU]
md13 : active raid1 sdd4[3] sdc4[2] sdb4[1]
458880 blocks [4/3] [_UUU]
bitmap: 18/57 pages [72KB], 4KB chunk
md9 : active raid1 sda1[0] sdd1[3] sdc1[2] sdb1[1]
530048 blocks [4/4] [UUUU]
bitmap: 1/65 pages [4KB], 4KB chunk
unused devices: <none>
我认为 /dev/sda3 丢失了
mdadm --examine /dev/sda3
mdadm: cannot open /dev/sda3: No such device or address
# mdadm --examine /dev/sdb3
/dev/sdb3:
Magic : a92b4efc
Version : 00.90.00
UUID : 9e1b8560:8504bb63:f5ca59e1:4b21abb1
Creation Time : Thu Jun 9 21:56:45 2011
Raid Level : raid5
Used Dev Size : 1951945600 (1861.52 GiB 1998.79 GB)
Array Size : 5855836800 (5584.56 GiB 5996.38 GB)
Raid Devices : 4
Total Devices : 3
Preferred Minor : 0
Update Time : Fri Dec 9 12:33:41 2016
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0
Checksum : 29c760bc - correct
Events : 0.16604494
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 1 8 19 1 active sync /dev/sdb3
0 0 0 0 0 removed
1 1 8 19 1 active sync /dev/sdb3
2 2 8 35 2 active sync /dev/sdc3
3 3 8 51 3 active sync /dev/sdd3
mdadm --examine /dev/sdc3
/dev/sdc3:
Magic : a92b4efc
Version : 00.90.00
UUID : 9e1b8560:8504bb63:f5ca59e1:4b21abb1
Creation Time : Thu Jun 9 21:56:45 2011
Raid Level : raid5
Used Dev Size : 1951945600 (1861.52 GiB 1998.79 GB)
Array Size : 5855836800 (5584.56 GiB 5996.38 GB)
Raid Devices : 4
Total Devices : 3
Preferred Minor : 0
Update Time : Fri Dec 9 12:33:49 2016
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0
Checksum : 29c760e6 - correct
Events : 0.16604502
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 2 8 35 2 active sync /dev/sdc3
0 0 0 0 0 removed
1 1 8 19 1 active sync /dev/sdb3
2 2 8 35 2 active sync /dev/sdc3
3 3 8 51 3 active sync /dev/sdd3
# mdadm --examine /dev/sdd3
/dev/sdd3:
Magic : a92b4efc
Version : 00.90.00
UUID : 9e1b8560:8504bb63:f5ca59e1:4b21abb1
Creation Time : Thu Jun 9 21:56:45 2011
Raid Level : raid5
Used Dev Size : 1951945600 (1861.52 GiB 1998.79 GB)
Array Size : 5855836800 (5584.56 GiB 5996.38 GB)
Raid Devices : 4
Total Devices : 3
Preferred Minor : 0
Update Time : Fri Dec 9 12:33:59 2016
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0
Checksum : 29c7610e - correct
Events : 0.16604508
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 3 8 51 3 active sync /dev/sdd3
0 0 0 0 0 removed
1 1 8 19 1 active sync /dev/sdb3
2 2 8 35 2 active sync /dev/sdc3
3 3 8 51 3 active sync /dev/sdd3
答案1
问题出在翻新硬盘上的分区上，我已使用 fdisk 应用程序替换了 RAID 中其他驱动程序的相同分区方案，然后重新启动系统。现在 RAID 正在重建 RAID 5