我今天安裝了一個新磁碟並正在準備它，然後才意識到我已經在現有 RAID1 陣列上完成了「準備」工作！如果可能的話，我希望能夠康復。
我的數組創建為/dev/md2來自驅動器/dev/sdf和/dev/sdh。這是我看到的fdisk -l 前破壞任何東西：
Disk /dev/sdf: 10.91 TiB, 12000138625024 bytes, 23437770752 sectors
Disk model: Generic DISK01
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: 0x00000000
Device Boot Start End Sectors Size Id Type
/dev/sdf1 1 4294967295 4294967295 2T ee GPT
Partition 1 does not start on physical sector boundary.
...
Disk /dev/sdh: 10.91 TiB, 12000138625024 bytes, 23437770752 sectors
Disk model: Generic DISK03
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: 0x00000000
Device Boot Start End Sectors Size Id Type
/dev/sdh1 1 4294967295 4294967295 2T ee GPT
Partition 1 does not start on physical sector boundary.
...
Disk /dev/md2: 10.91 TiB, 12000003358720 bytes, 23437506560 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
然後我跑了fdisk /dev/md2然後輸入g然後w：
Command (m for help): g
Created a new GPT disklabel (GUID: C3FA8F3E-4DD4-AD47-B2D4-F838EF831A2E).
The device contains 'ext4' signature and it will be removed by a write command. See fdisk(8) man page and --wipe option for more details.
Command (m for help): w
The partition table has been altered.
Syncing disks.
fdisk -l現在顯示：
Disk /dev/sdf: 10.91 TiB, 12000138625024 bytes, 23437770752 sectors
Disk model: Generic DISK01
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: 0x00000000
Device Boot Start End Sectors Size Id Type
/dev/sdf1 1 4294967295 4294967295 2T ee GPT
Partition 1 does not start on physical sector boundary.
...
Disk /dev/sdh: 10.91 TiB, 12000138625024 bytes, 23437770752 sectors
Disk model: Generic DISK03
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: 0x00000000
Device Boot Start End Sectors Size Id Type
/dev/sdh1 1 4294967295 4294967295 2T ee GPT
Partition 1 does not start on physical sector boundary.
...
Disk /dev/md2: 10.91 TiB, 12000003358720 bytes, 23437506560 sectors
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: gpt
Disk identifier: C3FA8F3E-4DD4-AD47-B2D4-F838EF831A2E
然後我fdisk /dev/md2再次運行，然後n使用所有預設值運行：
Command (m for help): n
Partition number (1-128, default 1):
First sector (2048-23437506526, default 2048):
Last sector, +/-sectors or +/-size{K,M,G,T,P} (2048-23437506526, default 23437506526):
Created a new partition 1 of type 'Linux filesystem' and of size 10.9 TiB.
Command (m for help): w
The partition table has been altered.
Syncing disks.
然後我又跑了fdisk -l一遍，才意識到我的愚蠢錯誤：
Disk /dev/sdf: 10.91 TiB, 12000138625024 bytes, 23437770752 sectors
Disk model: Generic DISK01
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: 0x00000000
Device Boot Start End Sectors Size Id Type
/dev/sdf1 1 4294967295 4294967295 2T ee GPT
Partition 1 does not start on physical sector boundary.
...
Disk /dev/sdh: 10.91 TiB, 12000138625024 bytes, 23437770752 sectors
Disk model: Generic DISK03
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: 0x00000000
Device Boot Start End Sectors Size Id Type
/dev/sdh1 1 4294967295 4294967295 2T ee GPT
Partition 1 does not start on physical sector boundary.
...
Disk /dev/md2: 10.91 TiB, 12000003358720 bytes, 23437506560 sectors
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: gpt
Disk identifier: C3FA8F3E-4DD4-AD47-B2D4-F838EF831A2E
Device Start End Sectors Size Type
/dev/md2p1 2048 23437506526 23437504479 10.9T Linux filesystem
這是目前的狀態/proc/mdstat：
md2 : active raid1 sdh[1] sdf[0]
11718753280 blocks super 1.2 [2/2] [UU]
bitmap: 0/88 pages [0KB], 65536KB chunk
md1 : active raid1 sda[0] sdb[1]
15625747456 blocks super 1.2 [2/2] [UU]
bitmap: 0/117 pages [0KB], 65536KB chunk
md0 : active raid1 sdc[0] sdd[1]
15625747456 blocks super 1.2 [2/2] [UU]
bitmap: 0/117 pages [0KB], 65536KB chunk
我現在已經卸載了 /dev/md2 並註解掉了/etc/mdadm/mdadm.conf.
奇怪的是，在卸載之前，我在檢查磁碟使用情況時看到了這一點：
plexadmin@petaccio-plex:/mnt$ df -h
Filesystem Size Used Avail Use% Mounted on
...
/dev/md2 4.4T 3.8T 0 100% /mnt/md2
...
雖然我不確定如何解釋這一點，因為這些是 RAID1 陣列中的 12TB 磁碟。
我最初使用建立數組這個 DigitalOcean 教學，最終創建了一個檔案系統：
mkfs.ext4 -F /dev/md2
我不知道從這裡到哪裡去，並且對做一些（其他）愚蠢的事情和破壞數據感到緊張。
這個陣還有恢復的希望嗎？
感謝大家的幫忙和時間！ :)
答案1
我能夠使用找到的說明還原 ext4 檔案系統這裡:
我曾經fsck.ext4 -vy /dev/md2檢查和修復 ext4 檔案系統。經過一些自動更正錯誤後，我能夠安裝陣列，我發現所有數據都完好無損！
快速提醒在獲取數據之前仔細檢查你的工作！ ：D