为什么 md1 状态为 UU，md0 状态为 U_，而 md2 状态为 _U？
nvme1n1 这里坏了。
我现在可以安全地更换 nvme1n1 吗？
您可以看到 md2 状态，nvme0n1p3 似乎已移除，但 nvme1n1p3 似乎处于活动状态。我如何安全地更换此处损坏的磁盘 nvme1n1？这里发生了什么？
我可以将 /dev/nvme1n1p3 克隆到 /dev/nvme0n1p3 吗？或者我如何简单地重新同步 md2 阵列中的 raid？/dev/nvme0n1p3 有 2 个月前的状态，当前操作系统状态在 /dev/nvme1n1p3 上
编辑：现在我要复制分区：
dd if=/dev/nvme1n1p3 of=/dev/nvme0n1p3
我之后是否应该重建 RAID 还是只能更换有故障的磁盘？
cat /prod/mdstat 输出
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10]
md1 : active raid1 nvme0n1p2[0] nvme1n1p2[1]
523264 blocks super 1.2 [2/2] [UU]
md0 : active raid1 nvme0n1p1[0]
33520640 blocks super 1.2 [2/1] [U_]
md2 : active raid1 nvme1n1p3[1]
465894720 blocks super 1.2 [2/1] [_U]
bitmap: 4/4 pages [16KB], 65536KB chunk
unused devices: <none>
MD 指出：
/dev/md0:
Version : 1.2
Creation Time : Sun Mar 15 21:50:14 2020
Raid Level : raid1
Array Size : 33520640 (31.97 GiB 34.33 GB)
Used Dev Size : 33520640 (31.97 GiB 34.33 GB)
Raid Devices : 2
Total Devices : 1
Persistence : Superblock is persistent
Update Time : Thu Jun 17 14:43:33 2021
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Consistency Policy : resync
Name : rescue:0
UUID : 41a6fa02:cafe993c:ba95e089:69e1cee9
Events : 3691713
Number Major Minor RaidDevice State
0 259 1 0 active sync /dev/nvme0n1p1
- 0 0 1 removed
/dev/md1:
Version : 1.2
Creation Time : Sun Mar 15 21:50:15 2020
Raid Level : raid1
Array Size : 523264 (511.00 MiB 535.82 MB)
Used Dev Size : 523264 (511.00 MiB 535.82 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Thu Jun 17 06:26:55 2021
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Consistency Policy : resync
Name : rescue:1
UUID : 28bb218f:54e5dcee:56f85d57:5c4577ba
Events : 131
Number Major Minor RaidDevice State
0 259 2 0 active sync /dev/nvme0n1p2
1 259 6 1 active sync /dev/nvme1n1p2
/dev/md2:
Version : 1.2
Creation Time : Sun Mar 15 21:50:15 2020
Raid Level : raid1
Array Size : 465894720 (444.31 GiB 477.08 GB)
Used Dev Size : 465894720 (444.31 GiB 477.08 GB)
Raid Devices : 2
Total Devices : 1
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Thu Jun 17 14:52:09 2021
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Consistency Policy : bitmap
Name : rescue:2
UUID : 3340d601:90ff36ca:da246d8d:c26b994f
Events : 46166134
Number Major Minor RaidDevice State
- 0 0 0 removed
1 259 7 1 active sync /dev/nvme1n1p
/dev/nvme1n1 已损坏：
=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: FAILED!
- NVM subsystem reliability has been degraded
SMART/Health Information (NVMe Log 0x02, NSID 0x1)
Critical Warning: 0x04
Temperature: 59 Celsius
Available Spare: 100%
Available Spare Threshold: 10%
Percentage Used: 149%