拆卸 RAID 1 阵列,无需删除/重新安装系统

拆卸 RAID 1 阵列,无需删除/重新安装系统

我已经使用内置 RAID 系统的 Debian 设置了 Soft Raid 1。我设置了 raid,因为当我设置服务器时我有一个空间 HDD,并想为什么不呢。 RAID 是使用我安装操作系统时 Debian 所做的一切设置的(抱歉,不是 Linux 技术人员)。

然而现在,我确实可以将磁盘用于更有用的目的。

是否可以轻松地停止raid而无需重新安装操作系统,我将如何做到这一点?

fdisk -l

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 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
Disk identifier: 0x000d9640

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1            2048   976771071   488384512   fd  Linux raid autodetect

Disk /dev/sdb: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 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
Disk identifier: 0x0009dd99

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048   950560767   475279360   83  Linux
/dev/sdb2       950562814   976771071    13104129    5  Extended
Partition 2 does not start on physical sector boundary.
/dev/sdb5       950562816   976771071    13104128   82  Linux swap / Solaris

Disk /dev/sdc: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 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 identifier: 0x6fa10d6b

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1              63  3907024064  1953512001    7  HPFS/NTFS/exFAT

Disk /dev/sdd: 7803 MB, 7803174912 bytes
122 heads, 58 sectors/track, 2153 cylinders, total 15240576 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 identifier: 0xc3072e18

   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1   *        8064    15240575     7616256    b  W95 FAT32

fstab内容:

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sdb1 during installation
UUID=cbc19adf-8ed0-4d20-a56e-13c1a74e9cf0 /               ext4    errors=remount-ro 0       1
# swap was on /dev/sdb5 during installation
UUID=f6836768-e2b6-4ccf-9827-99f58999607e none            swap    sw              0       0
/dev/sda1       /media/usb0     auto    rw,user,noauto  0       0
/dev/sdc1       /media/mns       ntfs-3g defaults        0       2

答案1

最简单的方法(无需对设置进行任何更改)可能是将 RAID 减少为单个磁盘。这样您就可以选择添加磁盘,从而在以后重新使用 RAID。

mdadm /dev/mdx --fail /dev/disky1
mdadm /dev/mdx --remove /dev/disky1
mdadm --grow /dev/mdx --raid-devices=1 --force

结果看起来像这样:

mdx : active raid1 diskx1[3]
      62519296 blocks super 1.2 [1/1] [U]

Ta-daa 单个磁盘“RAID1”。

如果您想完全摆脱 RAID 层,则需要mdadm --examine /dev/diskx1(找出数据偏移量),mdadm --zero-superblock(摆脱 RAID 元数据),并按parted数据偏移量移动分区,使其指向文件系统,然后更新引导加载程序和系统配置以反映 RAID 的缺失...

答案2

只是失败并删除您的驱动器之一:

mdadm /dev/md0 --fail /dev/sdb --remove /dev/sdb

之后将您更改/etc/fstab为使用 RAID 中剩余的驱动器。

重启。然后摧毁你的 RAID:

mdadm /dev/md0 --destroy

玩得开心 :)

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