我有一个 RAID1 阵列，我想将其分成两个独立的驱动器。/dev/sdb 和 /dev/sdc 是两个驱动器，有三个独立的分区。
/dev/sd[bc]1 /dev/md0
/dev/sd[bc]2 /dev/md1
/dev/sd[bc]3 /dev/md2
阵列的当前状态是：/dev/sdc 已被分配了新任务，不再是阵列的一部分。我正在尝试在没有 /dev/sdc 的情况下重新组装阵列。
当我尝试仅使用 /dev/sdb 启动阵列时，出现以下问题
luke@hoth:~$ sudo mdadm --verbose --assemble --run /dev/md0 /dev/sdb1
mdadm: looking for devices for /dev/md0
mdadm: Device /dev/sdb1 is not large enough for data described in superblock
mdadm: no RAID superblock on /dev/sdb1
mdadm: /dev/sdb1 has no superblock - assembly aborted
luke@hoth:~$ sudo mdadm --examine /dev/sdb1
/dev/sdb1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 775ff7b7:9f32199e:d05c36f6:581bbe80
Name : hoth:0 (local to host hoth)
Creation Time : Tue Oct 3 14:04:39 2023
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 524023808 sectors (249.87 GiB 268.30 GB)
Array Size : 262011904 KiB (249.87 GiB 268.30 GB)
Data Offset : 264192 sectors
Super Offset : 8 sectors
Unused Space : before=264112 sectors, after=-262143 sectors DEVICE TOO SMALL
State : clean TRUNCATED DEVICE
Device UUID : bd9c610b:d25f6823:55bdcdad:cf7c81d4
Internal Bitmap : 8 sectors from superblock
Update Time : Sat Apr 13 02:41:24 2024
Bad Block Log : 512 entries available at offset 16 sectors
Checksum : 997af08c - correct
Events : 18311
Device Role : Active device 1
Array State : .A ('A' == active, '.' == missing, 'R' == replacing)
我认为该问题与分区处于“清理截断的设备”状态有关，当我尝试组装驱动器上的任何其他分区时，我遇到了相同的错误和相同的状态。
我差点就让这条线路运行来尝试解决这个问题，但我不知道这是否会使情况变得更糟：
mdadm --create /dev/md0 --raid-devices=2 --level=1 /dev/sdb1 missing
我真的不知道接下来该做什么，因为我读过的所有文章中，没有一篇能清楚地解决我所处的境况，也没有一篇能让我“感到温暖”，让我能够遵循他们的解决方案。
我感谢您的帮助，我可以提供任何所需的额外信息！
以下是有关我的设置的更多信息
操作系统：Debian 测试版 (Trixie)
/dev/sdb——已知良好的 2TB Seagate NAS 硬盘
fdisk -l
Disk /dev/sdb: 1.82 TiB, 2000398934016 bytes, 3907029168 sectors
Disk model: ST2000DM005-2CW1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x4afa9d4b
Device Boot Start End Sectors Size Id Type
/dev/sdb1 * 2048 524027903 524025856 249.9G fd Linux raid autodetect
/dev/sdb2 524290048 1048315903 524025856 249.9G fd Linux raid autodetect
/dev/sdb3 1048578048 3906766847 2858188800 1.3T fd Linux raid autodetect
/dev/sdc——已知良好的 2TB Seagate NAS 硬盘
fdisk -l
Disk /dev/sdc: 1.82 TiB, 2000398934016 bytes, 3907029168 sectors
Disk model: ST2000DM005-2CW1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x2920693c
/etc/mdadm/mdadm.conf
# mdadm.conf
#
# !NB! Run update-initramfs -u after updating this file.
# !NB! This will ensure that initramfs has an uptodate copy.
#
MAILADDR root
DEVICE /dev/sd[bc][123]
ARRAY /dev/md0 metadata=1.2 name=hoth:0 level=raid1 num-devices=2 UUID=775ff7b7:9f32199e:d05c36f6:581bbe80
ARRAY /dev/md1 metadata=1.2 name=hoth:1 level=raid1 num-devices=2 UUID=1dbfc0fb:e0e82d09:f4ba2dc2:580c0b71
ARRAY /dev/md2 metadata=1.2 name=hoth:2 level=raid1 num-devices=2 UUID=2dabb7ff:4f868181:75d05891:dd13a16e
/dev/sdb1 mdadm --检查
/dev/sdb1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 775ff7b7:9f32199e:d05c36f6:581bbe80
Name : hoth:0 (local to host hoth)
Creation Time : Tue Oct 3 14:04:39 2023
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 524023808 sectors (249.87 GiB 268.30 GB)
Array Size : 262011904 KiB (249.87 GiB 268.30 GB)
Data Offset : 264192 sectors
Super Offset : 8 sectors
Unused Space : before=264112 sectors, after=-262143 sectors DEVICE TOO SMALL
State : clean TRUNCATED DEVICE
Device UUID : bd9c610b:d25f6823:55bdcdad:cf7c81d4
Internal Bitmap : 8 sectors from superblock
Update Time : Sat Apr 13 02:41:24 2024
Bad Block Log : 512 entries available at offset 16 sectors
Checksum : 997af08c - correct
Events : 18311
Device Role : Active device 1
Array State : .A ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdb2 mdadm --检查
/dev/sdb2:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 1dbfc0fb:e0e82d09:f4ba2dc2:580c0b71
Name : hoth:1 (local to host hoth)
Creation Time : Tue Oct 3 14:04:53 2023
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 524023808 sectors (249.87 GiB 268.30 GB)
Array Size : 262011904 KiB (249.87 GiB 268.30 GB)
Data Offset : 264192 sectors
Super Offset : 8 sectors
Unused Space : before=264112 sectors, after=-262143 sectors DEVICE TOO SMALL
State : clean TRUNCATED DEVICE
Device UUID : aadeafb8:ee259c18:dff6ec77:15f8599b
Internal Bitmap : 8 sectors from superblock
Update Time : Fri Apr 12 23:42:37 2024
Bad Block Log : 512 entries available at offset 16 sectors
Checksum : 3815b526 - correct
Events : 4885
Device Role : Active device 1
Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdb3 mdadm --检查
/dev/sdb3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 2dabb7ff:4f868181:75d05891:dd13a16e
Name : hoth:2 (local to host hoth)
Creation Time : Tue Oct 3 14:05:09 2023
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 2858186928 sectors (1362.89 GiB 1463.39 GB)
Array Size : 1429093440 KiB (1362.89 GiB 1463.39 GB)
Used Dev Size : 2858186880 sectors (1362.89 GiB 1463.39 GB)
Data Offset : 264192 sectors
Super Offset : 8 sectors
Unused Space : before=264112 sectors, after=-262271 sectors DEVICE TOO SMALL
State : clean TRUNCATED DEVICE
Device UUID : 3f000511:538ed947:10bb14aa:0a9853ad
Internal Bitmap : 8 sectors from superblock
Update Time : Fri Apr 12 23:42:38 2024
Bad Block Log : 512 entries available at offset 16 sectors
Checksum : 6316a366 - correct
Events : 27246
Device Role : Active device 1
Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
lsblk：
sda 8:0 0 119.2G 0 disk
├─sda1 8:1 0 512M 0 part /boot/efi
├─sda2 8:2 0 117.8G 0 part /
└─sda3 8:3 0 977M 0 part [SWAP]
sdb 8:16 0 1.8T 0 disk
├─sdb1 8:17 0 249.9G 0 part
├─sdb2 8:18 0 249.9G 0 part
└─sdb3 8:19 0 1.3T 0 part
sdc 8:32 0 1.8T 0 disk
sdd 8:48 1 7.5G 0 disk
├─sdd1 8:49 1 1.4G 0 part
└─sdd2 8:50 1 5M 0 part
sr0 11:0 1 1024M 0 rom