使用 mdadm 恢复多个 RAID 时遇到问题

使用 mdadm 恢复多个 RAID 时遇到问题

背景 我最近有一个 3.0TB 的芯片,它位于具有 RAID 1 冗余的 Synology NAS 的 Linux raid 中。我最近购买了两个 8.0TB 驱动器,想备份 3.0TB 驱动器,但我的 Synology 总是随机关闭并且遇到高级时刻。为了解决这个问题,我将所有驱动器放入运行 Linux Mint 18.x Live 的计算机中。我正在尝试安装两个 raid,以便我可以将 3.0TB 的 rsync 到 8.0TB raid。

问题 我无法重建任何袭击,因此无法访问任何驱动器。我的fidsk -l输出是这样的:

mint ~ # fdisk -l
Disk /dev/loop0: 1.5 GiB, 1618886656 bytes, 3161888 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


Disk /dev/nvme0n1: 477 GiB, 512110190592 bytes, 1000215216 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: DB2D71AC-EF2C-4540-A8E5-03C5D8F72D01

Device             Start        End   Sectors   Size Type
/dev/nvme0n1p1        40     409639    409600   200M EFI System
/dev/nvme0n1p2    409640  552935535 552525896 263.5G Apple HFS/HFS+
/dev/nvme0n1p3 552935536  554205071   1269536 619.9M Apple boot
/dev/nvme0n1p4 554205184  554237951     32768    16M Microsoft reserved
/dev/nvme0n1p5 554237952 1000214527 445976576 212.7G Microsoft basic data


Disk /dev/sda: 7.3 TiB, 8001563222016 bytes, 15628053168 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: 0A352E59-20D3-4471-AE03-F44E1C73E3EE

Device       Start         End     Sectors  Size Type
/dev/sda1     2048     4982527     4980480  2.4G Linux RAID
/dev/sda2  4982528     9176831     4194304    2G Linux RAID
/dev/sda5  9453280 15627846239 15618392960  7.3T Linux RAID


Disk /dev/sdb: 2.7 TiB, 3000592982016 bytes, 5860533168 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: FDB68AFA-6AA2-4AFF-B950-A65803C3E831

Device       Start        End    Sectors  Size Type
/dev/sdb1      256    4980735    4980480  2.4G Linux RAID
/dev/sdb2  4980736    9175039    4194304    2G Linux RAID
/dev/sdb3  9437184 5860328351 5850891168  2.7T Linux RAID


Disk /dev/sdc: 7.3 TiB, 8001563222016 bytes, 15628053168 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: 655B6D2C-8FDB-40B2-8A57-4A4C6CEA81FA

Device       Start         End     Sectors  Size Type
/dev/sdc1     2048     4982527     4980480  2.4G Linux RAID
/dev/sdc2  4982528     9176831     4194304    2G Linux RAID
/dev/sdc5  9453280 15627846239 15618392960  7.3T Linux RAID


Disk /dev/sdd: 465.8 GiB, 500107862016 bytes, 976773168 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: AB7A0C0E-F0F0-4169-A6CC-AFD36D13706B

Device      Start       End   Sectors   Size Type
/dev/sdd1      40    409639    409600   200M EFI System
/dev/sdd2  409640 976510983 976101344 465.5G Apple HFS/HFS+


Disk /dev/sde: 14.9 GiB, 16008609792 bytes, 31266816 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: 112D01E3-9B10-4E53-831E-6122DE30212F

Device      Start      End  Sectors  Size Type
/dev/sde1      40   409639   409600  200M EFI System
/dev/sde2  409640 31004631 30594992 14.6G Apple HFS/HFS+


Disk /dev/sdf: 3.8 GiB, 4026531840 bytes, 7864320 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: C0FCDDB9-DB52-4F40-8615-EB3CE0E2D4F4

Device     Start     End Sectors  Size Type
/dev/sdf1   2048 7864286 7862239  3.8G Microsoft basic data

唯一重要的驱动器是/dev/sda, /dev/sdb, /dev/sdc

我尝试过的事情

mdadm -Asf && vgchange -ay根据 Synology 网站返回的建议

mdadm: Devices UUID-f2e5c234:6e894003:d490d253:6ab62f4d and UUID-f8782d0e:605a2e0e:4c50beb7:39f5970b have the same name: /dev/md/2

mdadm: Duplicate MD device names in conf file were found.

好的mdadm --assemble --scan回报是一样的。

mdadm --stop /dev/sdb我在阅读时也尝试过这里。总而言之,他们说 mdadm 拥有该驱动器,因此您无法正常安装它,但由于它是一个驱动器,您可以销毁 mdadm raid 元数据并正常安装它。此代码返回

mdadm --stop /dev/sdb
mdadm: /dev/sdb does not appear to be an md device

尝试独立安装单个驱动器并mdadm -A /dev/sdb返回:

mdadm: /dev/sdb does not appear to be an md device

为什么我认为事情没有坏掉 过去,当它的死兄弟也插入时,我已经成功安装了 3.0 TB /dev/sdb 驱动器。在这些情况下,mdadm 只是说它用一个驱动器构建了阵列。我知道这些 8.0TB 驱动器可以工作,因为我刚刚从 Synology 服务器中取出它们,尽管它们不是采用 RAID 1 配置,而是采用 Synology Hybrid RAID,我不知道这是否有什么区别。

我认为问题是什么 老实说,我相信(以我极其有限的经验),问题来自于同一台机器上同时存在两个 RAID 阵列,这让 mdadm 感到困惑。我认为解决方案可能与编辑/etc/mdadm.conf指定哪个 RAID 属于哪个,然后再次尝试组装有关。然而,我感到独立尝试重建阵列表示驱动器似乎不是 md 设备。所以现在我不知道该怎么办。

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