誤ってSSDのRAID 5にFedoraサーバーをインストールしました。攻撃はまだ始まっていません：
# mount /dev/md0 /mnt/raid
mount: /mnt/raid: wrong fs type, bad option, bad superblock on /dev/md0, missing codepage or helper program, or other error.
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 1.8T 0 disk
└─md0 9:0 0 5.5T 0 raid5
├─md0p1 259:14 0 199.5M 0 md
├─md0p2 259:15 0 1G 0 md
├─md0p3 259:16 0 7.8G 0 md
└─md0p4 259:17 0 5.5T 0 md
sdb 8:16 0 1.8T 0 disk
└─md0 9:0 0 5.5T 0 raid5
├─md0p1 259:14 0 199.5M 0 md
├─md0p2 259:15 0 1G 0 md
├─md0p3 259:16 0 7.8G 0 md
└─md0p4 259:17 0 5.5T 0 md
sdc 8:32 0 1.8T 0 disk
└─md0 9:0 0 5.5T 0 raid5
├─md0p1 259:14 0 199.5M 0 md
├─md0p2 259:15 0 1G 0 md
├─md0p3 259:16 0 7.8G 0 md
└─md0p4 259:17 0 5.5T 0 md
sdd 8:48 0 1.8T 0 disk
└─md0 9:0 0 5.5T 0 raid5
├─md0p1 259:14 0 199.5M 0 md
├─md0p2 259:15 0 1G 0 md
├─md0p3 259:16 0 7.8G 0 md
└─md0p4 259:17 0 5.5T 0 md
nvme0n1 259:0 0 238.5G 0 disk
├─nvme0n1p1 259:1 0 200M 0 part /boot/efi
├─nvme0n1p2 259:2 0 1G 0 part /boot
├─nvme0n1p3 259:3 0 7.8G 0 part [SWAP]
├─nvme0n1p4 259:4 0 50G 0 part /
└─nvme0n1p5 259:5 0 179.5G 0 part /home
# fdisk -l
Disk /dev/sda: 1.8 TiB, 2000398934016 bytes, 3907029168 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: dos
Disk identifier: 0xa3cc0309
Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 3907029167 3907027120 1.8T fd Linux raid autodetect
Disk /dev/sdb: 1.8 TiB, 2000398934016 bytes, 3907029168 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: dos
Disk identifier: 0xed8ce2fd
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 3907029167 3907027120 1.8T fd Linux raid autodetect
Disk /dev/sdc: 1.8 TiB, 2000398934016 bytes, 3907029168 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: dos
Disk identifier: 0x3d7e7ce7
Device Boot Start End Sectors Size Id Type
/dev/sdc1 2048 3907029167 3907027120 1.8T fd Linux raid autodetect
Disk /dev/sdd: 1.8 TiB, 2000398934016 bytes, 3907029168 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: dos
Disk identifier: 0x105b1153
Device Boot Start End Sectors Size Id Type
/dev/sdd1 2048 3907029167 3907027120 1.8T fd Linux raid autodetect
Disk /dev/nvme0n1: 238.5 GiB, 256060514304 bytes, 500118192 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 9B5B3FC7-C545-4AE7-94A4-D1B2BFCB006D
Device Start End Sectors Size Type
/dev/nvme0n1p1 2048 411647 409600 200M EFI System
/dev/nvme0n1p2 411648 2508799 2097152 1G Linux filesystem
/dev/nvme0n1p3 2508800 18849791 16340992 7.8G Linux swap
/dev/nvme0n1p4 18849792 123707391 104857600 50G Linux filesystem
/dev/nvme0n1p5 123707392 500117503 376410112 179.5G Linux filesystem
Disk /dev/md0: 5.5 TiB, 6000793878528 bytes, 11720300544 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 524288 bytes / 1572864 bytes
Disklabel type: gpt
Disk identifier: E95D6E40-653D-4E3B-AD23-473266AB7890
Device Start End Sectors Size Type
/dev/md0p1 3072 411647 408576 199.5M EFI System
/dev/md0p2 411648 2509823 2098176 1G Linux filesystem
/dev/md0p3 2509824 18849791 16339968 7.8G Linux swap
/dev/md0p4 18849792 11720294399 11701444608 5.5T Linux filesystem
cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 sdd[4] sdb[0] sdc[2] sda[1]
5860150272 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/4] [UUUU]
bitmap: 0/15 pages [0KB], 65536KB chunk
unused devices: <none>
mdadm --examine /dev/sda
/dev/sda:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 6f619c94:6b307950:3fdba8c6:4f42b906
Name : localhost.localdomain:0
Creation Time : Wed Jul 20 12:14:37 2016
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
Array Size : 5860150272 (5588.67 GiB 6000.79 GB)
Used Dev Size : 3906766848 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=176 sectors
State : clean
Device UUID : a1d9b5ed:86165a6d:d89c58e5:eb920479
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jul 13 15:53:28 2020
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : afaddf01 - correct
Events : 65852
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
mdadm --examine /dev/sdb
/dev/sdb:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 6f619c94:6b307950:3fdba8c6:4f42b906
Name : localhost.localdomain:0
Creation Time : Wed Jul 20 12:14:37 2016
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
Array Size : 5860150272 (5588.67 GiB 6000.79 GB)
Used Dev Size : 3906766848 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=176 sectors
State : clean
Device UUID : d3a9e0cc:a3d59a4f:25bba234:b9d61ef3
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jul 13 15:53:28 2020
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 3a7dd06a - correct
Events : 65852
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
mdadm --examine /dev/sdc
/dev/sdc:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 6f619c94:6b307950:3fdba8c6:4f42b906
Name : localhost.localdomain:0
Creation Time : Wed Jul 20 12:14:37 2016
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
Array Size : 5860150272 (5588.67 GiB 6000.79 GB)
Used Dev Size : 3906766848 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=176 sectors
State : clean
Device UUID : 6bda75d1:a7960438:b0b18851:bdc1e1d8
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jul 13 15:53:28 2020
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 2a25a397 - correct
Events : 65852
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
mdadm --examine /dev/sdd
/dev/sdd:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 6f619c94:6b307950:3fdba8c6:4f42b906
Name : localhost.localdomain:0
Creation Time : Wed Jul 20 12:14:37 2016
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
Array Size : 5860150272 (5588.67 GiB 6000.79 GB)
Used Dev Size : 3906766848 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=176 sectors
State : clean
Device UUID : 0f8d3e2f:409ba082:7369a795:614a1a07
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jul 13 15:53:28 2020
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 44e19b3c - correct
Events : 65852
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 3
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
RAIDからデータを回復する機会がありますか？