今天我回到家发现我的家庭服务器关闭了（不知道为什么）。再次打开它，RAID 阵列无法安装。
/proc/mdstat 显示：
Personalities :
md0 : inactive sdh[7](S) sdc[2](S) sdd[1](S) sdb[3](S) sde[0](S) sdg[5](S) sdi[6](S) sdf[4](S)
39069143232 blocks super 1.2
unused devices: <none>
并且 mdadm --detail /dev/md0 表示 raid 级别是 raid0，而实际上应该是 raid6。
查看每个驱动器上的 mdadm -E。除 sdg 之外的所有驱动器的阵列状态均为 AAAAA.AA，事件计数为 191578，并且状态为活跃。
但是，sdg 的数组状态为 AAAAAAAA，事件计数为 69286，并且状态是干净的。
还要注意的是，-E 中显示的数组 UUID 与我在 /etc/mdadm.conf 中的数组 UUID 不同 - 虽然这可能是由于我过去遇到的一个问题，即机器在开始增长时崩溃了，我必须运行mdadm -CR /dev/md0 --metadata=1.2 --raid-devices=5 --level=6 -c512 /dev/sdb /dev/sdc /dev/sdd /dev/sdf /dev/sde --assume-clean它来解决这个问题，但我猜它也改变了数组 UUID。
作为参考，该系统包含一个连接到主板的启动 ssd（/dev/sda）和 8 个 5TB 驱动器，用于 raid 6 阵列（/dev/sdb 至 /dev/sdi），连接到 IT 模式下的 dell perc H310。
所有驱动器的 mdadm -E 输出：
/dev/sdb:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 2a625f41:32a13393:978936d5:902719da
Name : azelphur-server:0 (local to host azelphur-server)
Creation Time : Thu Mar 23 18:29:16 2017
Raid Level : raid6
Raid Devices : 8
Avail Dev Size : 9767285168 (4657.40 GiB 5000.85 GB)
Array Size : 29301835776 (27944.41 GiB 30005.08 GB)
Used Dev Size : 9767278592 (4657.40 GiB 5000.85 GB)
Data Offset : 250880 sectors
Super Offset : 8 sectors
Unused Space : before=250792 sectors, after=11696 sectors
State : active
Device UUID : 6228ab0d:6a65fce7:b7a2cda8:e246fbf9
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jul 23 18:20:53 2018
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 36d4b421 - correct
Events : 191578
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 3
Array State : AAAAA.AA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdc:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 2a625f41:32a13393:978936d5:902719da
Name : azelphur-server:0 (local to host azelphur-server)
Creation Time : Thu Mar 23 18:29:16 2017
Raid Level : raid6
Raid Devices : 8
Avail Dev Size : 9767285168 (4657.40 GiB 5000.85 GB)
Array Size : 29301835776 (27944.41 GiB 30005.08 GB)
Used Dev Size : 9767278592 (4657.40 GiB 5000.85 GB)
Data Offset : 250880 sectors
Super Offset : 8 sectors
Unused Space : before=250792 sectors, after=11696 sectors
State : active
Device UUID : e08e56d8:a5eb2baf:b9362af3:369a4f84
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jul 23 18:20:53 2018
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 9d60882f - correct
Events : 191578
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : AAAAA.AA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdd:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 2a625f41:32a13393:978936d5:902719da
Name : azelphur-server:0 (local to host azelphur-server)
Creation Time : Thu Mar 23 18:29:16 2017
Raid Level : raid6
Raid Devices : 8
Avail Dev Size : 9767285168 (4657.40 GiB 5000.85 GB)
Array Size : 29301835776 (27944.41 GiB 30005.08 GB)
Used Dev Size : 9767278592 (4657.40 GiB 5000.85 GB)
Data Offset : 250880 sectors
Super Offset : 8 sectors
Unused Space : before=250792 sectors, after=11696 sectors
State : active
Device UUID : 0b4e9aec:42dc5e1c:548f4882:34da967f
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jul 23 18:20:53 2018
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : a93cd08e - correct
Events : 191578
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : AAAAA.AA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sde:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 2a625f41:32a13393:978936d5:902719da
Name : azelphur-server:0 (local to host azelphur-server)
Creation Time : Thu Mar 23 18:29:16 2017
Raid Level : raid6
Raid Devices : 8
Avail Dev Size : 9767285168 (4657.40 GiB 5000.85 GB)
Array Size : 29301835776 (27944.41 GiB 30005.08 GB)
Used Dev Size : 9767278592 (4657.40 GiB 5000.85 GB)
Data Offset : 250880 sectors
Super Offset : 8 sectors
Unused Space : before=250792 sectors, after=11696 sectors
State : active
Device UUID : ea04e5bb:f6c9f9ff:1e68eca2:8e990546
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jul 23 18:20:53 2018
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 43350d45 - correct
Events : 191578
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAAAA.AA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdf:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 2a625f41:32a13393:978936d5:902719da
Name : azelphur-server:0 (local to host azelphur-server)
Creation Time : Thu Mar 23 18:29:16 2017
Raid Level : raid6
Raid Devices : 8
Avail Dev Size : 9767285168 (4657.40 GiB 5000.85 GB)
Array Size : 29301835776 (27944.41 GiB 30005.08 GB)
Used Dev Size : 9767278592 (4657.40 GiB 5000.85 GB)
Data Offset : 250880 sectors
Super Offset : 8 sectors
Unused Space : before=250792 sectors, after=11696 sectors
State : active
Device UUID : 03f09a11:5bc14011:8d3f7f4d:bc33d6b9
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jul 23 18:20:53 2018
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : c8956162 - correct
Events : 191578
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : AAAAA.AA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdg:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 2a625f41:32a13393:978936d5:902719da
Name : azelphur-server:0 (local to host azelphur-server)
Creation Time : Thu Mar 23 18:29:16 2017
Raid Level : raid6
Raid Devices : 8
Avail Dev Size : 9767285168 (4657.40 GiB 5000.85 GB)
Array Size : 29301835776 (27944.41 GiB 30005.08 GB)
Used Dev Size : 9767278592 (4657.40 GiB 5000.85 GB)
Data Offset : 250880 sectors
Super Offset : 8 sectors
Unused Space : before=250800 sectors, after=11696 sectors
State : clean
Device UUID : 3b0f7209:ed729a79:2ebc9ab1:07d6e063
Internal Bitmap : 8 sectors from superblock
Update Time : Sun Jul 8 17:26:16 2018
Bad Block Log : 512 entries available at offset 32 sectors
Checksum : 36dc9ff0 - correct
Events : 69286
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 5
Array State : AAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdh:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 2a625f41:32a13393:978936d5:902719da
Name : azelphur-server:0 (local to host azelphur-server)
Creation Time : Thu Mar 23 18:29:16 2017
Raid Level : raid6
Raid Devices : 8
Avail Dev Size : 9767290288 (4657.41 GiB 5000.85 GB)
Array Size : 29301835776 (27944.41 GiB 30005.08 GB)
Used Dev Size : 9767278592 (4657.40 GiB 5000.85 GB)
Data Offset : 250880 sectors
Super Offset : 8 sectors
Unused Space : before=250800 sectors, after=11696 sectors
State : active
Device UUID : e042a7da:1cb4058f:6a976fa7:f30203e1
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jul 23 18:20:53 2018
Bad Block Log : 512 entries available at offset 32 sectors
Checksum : 9083e1f1 - correct
Events : 191578
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 7
Array State : AAAAA.AA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdi:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 2a625f41:32a13393:978936d5:902719da
Name : azelphur-server:0 (local to host azelphur-server)
Creation Time : Thu Mar 23 18:29:16 2017
Raid Level : raid6
Raid Devices : 8
Avail Dev Size : 9767285168 (4657.40 GiB 5000.85 GB)
Array Size : 29301835776 (27944.41 GiB 30005.08 GB)
Used Dev Size : 9767278592 (4657.40 GiB 5000.85 GB)
Data Offset : 250880 sectors
Super Offset : 8 sectors
Unused Space : before=250800 sectors, after=11696 sectors
State : active
Device UUID : 5742d56b:3c9b9f70:35e9550f:349db858
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jul 23 18:20:53 2018
Bad Block Log : 512 entries available at offset 32 sectors
Checksum : e2e7a091 - correct
Events : 191578
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 6
Array State : AAAAA.AA ('A' == active, '.' == missing, 'R' == replacing)
lsdrv的输出：
PCI [ahci] 00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 04)
└scsi 1:0:0:0 ATA Samsung SSD 840
└sda 465.76g [8:0] Empty/Unknown
├sda1 512.00m [8:1] Empty/Unknown
│└Mounted as /dev/sda1 @ /boot
├sda2 457.78g [8:2] Empty/Unknown
│└Mounted as /dev/sda2 @ /
└sda3 7.48g [8:3] Empty/Unknown
PCI [mpt3sas] 02:00.0 Serial Attached SCSI controller: LSI Logic / Symbios Logic SAS2008 PCI-Express Fusion-MPT SAS-2 [Falcon] (rev 03)
├phy-0:0 scsi 0:0:0:0 ATA TOSHIBA MD04ACA5
│└sdb 4.55t [8:16] Empty/Unknown
│ └md0 0.00k [9:0] MD v1.2 () inactive, None (None) None {None}
│ Empty/Unknown
├phy-0:1 scsi 0:0:1:0 ATA TOSHIBA MD04ACA5
│└sdc 4.55t [8:32] Empty/Unknown
│ └md0 0.00k [9:0] MD v1.2 () inactive, None (None) None {None}
│ Empty/Unknown
├phy-0:2 scsi 0:0:2:0 ATA TOSHIBA MD04ACA5
│└sdd 4.55t [8:48] Empty/Unknown
│ └md0 0.00k [9:0] MD v1.2 () inactive, None (None) None {None}
│ Empty/Unknown
├phy-0:3 scsi 0:0:3:0 ATA TOSHIBA MD04ACA5
│└sde 4.55t [8:64] Empty/Unknown
│ └md0 0.00k [9:0] MD v1.2 () inactive, None (None) None {None}
│ Empty/Unknown
├phy-0:4 scsi 0:0:4:0 ATA ST5000DM000-1FK1
│└sdf 4.55t [8:80] Empty/Unknown
│ └md0 0.00k [9:0] MD v1.2 () inactive, None (None) None {None}
│ Empty/Unknown
├phy-0:5 scsi 0:0:5:0 ATA ST5000DM000-1FK1
│└sdg 4.55t [8:96] Empty/Unknown
│ └md0 0.00k [9:0] MD v1.2 () inactive, None (None) None {None}
│ Empty/Unknown
├phy-0:6 scsi 0:0:7:0 ATA ST5000DM000-1FK1
│└sdi 4.55t [8:128] Empty/Unknown
│ └md0 0.00k [9:0] MD v1.2 () inactive, None (None) None {None}
│ Empty/Unknown
└phy-0:7 scsi 0:0:6:0 ATA TOSHIBA MD04ACA5
└sdh 4.55t [8:112] Empty/Unknown
└md0 0.00k [9:0] MD v1.2 () inactive, None (None) None {None}
Empty/Unknown
所有驱动器的 Smartctl：https://pastebin.com/raw/04HeUBzw