我有 2 个hdd's正在raid1使用mdadm。
现在我想完全禁用 raid，但我想保留磁盘 1 上的数据，并单独使用磁盘 2
有没有办法做到这一点。
说实话，我知道什么是 raid，但我不知道它是如何处理的mdadm。
我正在使用 Ubuntu 14.04
配置：
mdadm: /dev/md does not appear to be an md device
/dev/md0:
Version : 1.2
Creation Time : Tue Jul 7 10:13:17 2015
Raid Level : raid1
Array Size : 16768896 (15.99 GiB 17.17 GB)
Used Dev Size : 16768896 (15.99 GiB 17.17 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Sun Oct 11 15:50:16 2015
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : rescue:0
UUID : ec52104c:85983ebd:8a13b660:706bae89
Events : 32
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 8 17 1 active sync /dev/sdb1
/dev/md1:
Version : 1.2
Creation Time : Tue Jul 7 10:13:20 2015
Raid Level : raid1
Array Size : 523968 (511.77 MiB 536.54 MB)
Used Dev Size : 523968 (511.77 MiB 536.54 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Sat Sep 19 12:41:03 2015
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : rescue:1
UUID : decb590d:aac47b81:568a2afa:3dee7600
Events : 30
Number Major Minor RaidDevice State
0 8 2 0 active sync /dev/sda2
1 8 18 1 active sync /dev/sdb2
/dev/md2:
Version : 1.2
Creation Time : Tue Jul 7 10:13:20 2015
Raid Level : raid1
Array Size : 1073610560 (1023.87 GiB 1099.38 GB)
Used Dev Size : 1073610560 (1023.87 GiB 1099.38 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon Oct 12 09:25:14 2015
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : rescue:2
UUID : 1daa4480:ddf3f359:575a1f97:e232bbdd
Events : 195
Number Major Minor RaidDevice State
0 8 3 0 active sync /dev/sda3
1 8 19 1 active sync /dev/sdb3
/dev/md3:
Version : 1.2
Creation Time : Tue Jul 7 10:13:20 2015
Raid Level : raid1
Array Size : 1839089920 (1753.89 GiB 1883.23 GB)
Used Dev Size : 1839089920 (1753.89 GiB 1883.23 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon Oct 12 09:04:16 2015
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : rescue:3
UUID : 051aac4e:ecac8794:538fe663:c9212747
Events : 92
Number Major Minor RaidDevice State
0 8 4 0 active sync /dev/sda4
1 8 20 1 active sync /dev/sdb4
。
WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sda: 3000.6 GB, 3000592982016 bytes
256 heads, 63 sectors/track, 363376 cylinders, total 5860533168 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: 0x00000000
Device Boot Start End Blocks Id System
/dev/sda1 * 1 4294967295 2147483647+ ee GPT
WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sdb: 3000.6 GB, 3000592982016 bytes
256 heads, 63 sectors/track, 363376 cylinders, total 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
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 4294967295 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.
Disk /dev/md0: 17.2 GB, 17171349504 bytes
2 heads, 4 sectors/track, 4192224 cylinders, total 33537792 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: 0x00000000
Disk /dev/md0 doesn't contain a valid partition table
Disk /dev/md1: 536 MB, 536543232 bytes
2 heads, 4 sectors/track, 130992 cylinders, total 1047936 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: 0x00000000
Disk /dev/md1 doesn't contain a valid partition table
Disk /dev/md3: 1883.2 GB, 1883228078080 bytes
2 heads, 4 sectors/track, 459772480 cylinders, total 3678179840 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: 0x00000000
Disk /dev/md3 doesn't contain a valid partition table
Disk /dev/md2: 1099.4 GB, 1099377213440 bytes
2 heads, 4 sectors/track, 268402640 cylinders, total 2147221120 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: 0x00000000
Disk /dev/md2 doesn't contain a valid partition table
答案1
您不能直接从阵列中删除磁盘，除非它发生故障，因此我们必须首先使其发生故障（如果驱动器发生故障，则通常已经处于故障状态，因此不需要此步骤）：
mdadm --fail /dev/md0 /dev/sda1
现在我们可以删除它了：
mdadm --remove /dev/md0 /dev/sda1
只需一步即可完成：
mdadm /dev/md0 --fail /dev/sda1 --remove /dev/sda1
然后将磁盘作为普通磁盘挂载：
sudo mount -t auto /dev/sda1 /media/disk