安装的驱动器消失并且不再是有效的 LUKS 设备

2024-5-26 • tag-icon

几天前，我以懒惰的方式（使用 gnome-disks）对固态硬盘进行了格式化和加密（LUKS+Ext4）。磁盘已安装，我将一些数据从另一个驱动器移至磁盘，我要将其清零并加密。当然，这实际上是我没有至少 3 个副本（甚至 1 个）的唯一数据。第二天，我看到分区不再安装，似乎消失了。

fdisk -l /dev/sdb

Disk /dev/sdb:
...
Disk identifier: 0x00000000

Disk /dev/sdb doesn't contain a valid partition table

文件-s /dev/sdb

/dev/sdb: data

我使用 hexdump 检查驱动器上是否有数据（以排除我不小心将其归零的情况）。

dd if=/dev/sdb bs=512 计数=2048 |十六进制转储-C 显示零，但是一旦我达到 count=2049，我就开始看到一些数据：

dd if=/dev/sdb bs=512 计数=2049 |十六进制转储-C

00000000  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00100000  4c 55 4b 53 ba be 00 01  61 65 73 00 00 00 00 00  |LUKS....aes.....|
00100010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00100020  00 00 00 00 00 00 00 00  78 74 73 2d 70 6c 61 69  |........xts-plai|
00100030  6e 36 34 00 00 00 00 00  00 00 00 00 00 00 00 00  |n64.............|
00100040  00 00 00 00 00 00 00 00  73 68 61 31 00 00 00 00  |........sha1....|
00100050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00100060  00 00 00 00 00 00 00 00  00 00 10 00 00 00 00 20  |............... |
00100070  54 de 2e 44 8a 4e f7 04  e2 c5 90 f3 0b 46 37 5c  |T..D.N.......F7\|
00100080  69 56 f9 d0 3f f7 e8 b8  cf fa c6 18 0d c1 5e 8c  |iV..?.........^.|
00100090  4e 11 73 1c 2b c0 1d 71  7d bb 61 61 10 5d ea 8c  |N.s.+..q}.aa.]..|
001000a0  0a 10 96 bc 00 00 c5 44  34 35 38 65 33 34 30 34  |.......D458e3404|
001000b0  2d 64 62 35 38 2d 34 62  38 30 2d 39 32 64 64 2d  |-db58-4b80-92dd-|
001000c0  30 38 37 63 30 33 61 36  39 38 38 64 00 00 00 00  |087c03a6988d....|
001000d0  00 ac 71 f3 00 03 0a cf  a3 c8 f9 1e 42 bb 99 b0  |..q.........B...|
001000e0  9c 91 4c 66 fb 01 60 47  98 bc d0 b8 e3 3c 6f 64  |..Lf..`G.....<od|
001000f0  9a cf 06 85 ef 1d 42 0c  00 00 00 08 00 00 0f a0  |......B.........|
00100100  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00100110  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00100120  00 00 00 00 00 00 00 00  00 00 01 08 00 00 0f a0  |................|
00100130  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00100140  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00100150  00 00 00 00 00 00 00 00  00 00 02 08 00 00 0f a0  |................|
00100160  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00100170  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00100180  00 00 00 00 00 00 00 00  00 00 03 08 00 00 0f a0  |................|
00100190  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |................|
001001a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
001001b0  00 00 00 00 00 00 00 00  00 00 04 08 00 00 0f a0  |................|
001001c0  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |................|
001001d0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
001001e0  00 00 00 00 00 00 00 00  00 00 05 08 00 00 0f a0  |................|
001001f0  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00100200

我唯一能想到的另一件事是，我想我可能后来不小心给了另一个分区同名（我想这可能导致卸载）。

任何意见将不胜感激。

更新：

lsmod | grep dm_crypt

dm_crypt               23216  2

uname -r

3.16.0-38-generic

更新2：

不确定这是否有帮助，但我将标头的第一部分与另一个加密分区的标头进行了比较，这就是结果。

diff -y <(dd if=/dev/sdb bs=512skip=2048 count=1 | hexdump -C) <(dd if=/dev/sdc1 bs=512skip=0 count=1 | hexdump -C)

00000000  4c 55 4b 53 ba be 00 01  61 65 73 00 00 00 00 00  |   00000000  4c 55 4b 53 ba be 00 01  61 65 73 00 00 00 00 00  |
00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |   00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |
00000020  00 00 00 00 00 00 00 00  78 74 73 2d 70 6c 61 69  |   00000020  00 00 00 00 00 00 00 00  78 74 73 2d 70 6c 61 69  |
00000030  6e 36 34 00 00 00 00 00  00 00 00 00 00 00 00 00  |   00000030  6e 36 34 00 00 00 00 00  00 00 00 00 00 00 00 00  |
00000040  00 00 00 00 00 00 00 00  73 68 61 31 00 00 00 00  |   00000040  00 00 00 00 00 00 00 00  73 68 61 31 00 00 00 00  |
00000050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |   00000050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |
00000060  00 00 00 00 00 00 00 00  00 00 10 00 00 00 00 20  | | 00000060  00 00 00 00 00 00 00 00  00 00 10 01 00 00 00 20  |
00000070  54 de 2e 44 8a 4e f7 04  e2 c5 90 f3 0b 46 37 5c  | | 00000070  24 1a 58 e8 ce 91 4b ef  db 9d d0 27 9c 27 3c 02  |
00000080  69 56 f9 d0 3f f7 e8 b8  cf fa c6 18 0d c1 5e 8c  | | 00000080  b7 27 35 b7 e5 ec 6d 6b  4f af 63 ab 06 03 4d da  |
00000090  4e 11 73 1c 2b c0 1d 71  7d bb 61 61 10 5d ea 8c  | | 00000090  eb 05 49 29 4b be 98 73  6c 4b 2e 49 b3 75 14 a0  |
000000a0  0a 10 96 bc 00 00 c5 44  34 35 38 65 33 34 30 34  | | 000000a0  69 ef 8a 53 00 00 c4 c7  64 63 64 35 66 65 32 35  |
000000b0  2d 64 62 35 38 2d 34 62  38 30 2d 39 32 64 64 2d  | | 000000b0  2d 34 31 34 31 2d 34 35  34 31 2d 39 32 37 39 2d  |
000000c0  30 38 37 63 30 33 61 36  39 38 38 64 00 00 00 00  | | 000000c0  37 35 31 38 34 66 64 61  37 39 63 31 00 00 00 00  |
000000d0  00 ac 71 f3 00 03 0a cf  a3 c8 f9 1e 42 bb 99 b0  | | 000000d0  00 ac 71 f3 00 03 09 9a  eb 00 61 89 23 34 ff b7  |
000000e0  9c 91 4c 66 fb 01 60 47  98 bc d0 b8 e3 3c 6f 64  | | 000000e0  cf 33 12 1e 5d a8 81 8c  b6 3c e3 8b 18 b6 1f e5  |
000000f0  9a cf 06 85 ef 1d 42 0c  00 00 00 08 00 00 0f a0  | | 000000f0  24 4b 5a 07 ca b3 49 8c  00 00 00 08 00 00 0f a0  |
00000100  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |   00000100  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |
00000110  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |   00000110  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |
00000120  00 00 00 00 00 00 00 00  00 00 01 08 00 00 0f a0  |   00000120  00 00 00 00 00 00 00 00  00 00 01 08 00 00 0f a0  |
00000130  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |   00000130  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |
00000140  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |   00000140  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |
00000150  00 00 00 00 00 00 00 00  00 00 02 08 00 00 0f a0  |   00000150  00 00 00 00 00 00 00 00  00 00 02 08 00 00 0f a0  |
00000160  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |   00000160  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |
00000170  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |   00000170  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |
00000180  00 00 00 00 00 00 00 00  00 00 03 08 00 00 0f a0  |   00000180  00 00 00 00 00 00 00 00  00 00 03 08 00 00 0f a0  |
00000190  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |   00000190  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |
000001a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |   000001a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |
000001b0  00 00 00 00 00 00 00 00  00 00 04 08 00 00 0f a0  |   000001b0  00 00 00 00 00 00 00 00  00 00 04 08 00 00 0f a0  |
000001c0  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |   000001c0  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |
000001d0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |   000001d0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |
000001e0  00 00 00 00 00 00 00 00  00 00 05 08 00 00 0f a0  |   000001e0  00 00 00 00 00 00 00 00  00 00 05 08 00 00 0f a0  |
000001f0  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |   000001f0  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |
00000200                            00000200

答案1

感谢@grochmal，我能够通过执行以下操作来访问驱动器上的数据：

dd if=/dev/sdb of=sdb.img bs=512 跳过=2048 转换=noerror，同步
losetup /dev/loop0 sdb.img
cryptsetup luks打开/dev/loop0数据

答案1

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