mdadm 删除软件 RAID

淩亂°似流年 2022-12-11 06:25 155阅读 0赞

### mdadm 删除 软件 RAID ###

*  1，查看
 *  2，删除

# 1，查看 #

# mdadm -D /dev/md0
    /dev/md0:
               Version : 1.2
         Creation Time : Sun Sep 20 16:28:18 2020
            Raid Level : raid0
            Array Size : 62511153152 (59615.28 GiB 64011.42 GB)
          Raid Devices : 8
         Total Devices : 8
           Persistence : Superblock is persistent
    
           Update Time : Sun Sep 20 16:28:18 2020
                 State : clean
        Active Devices : 8
       Working Devices : 8
        Failed Devices : 0
         Spare Devices : 0
    
            Chunk Size : 512K
    
    Consistency Policy : none
    
                  Name : ubuntu-server:0
                  UUID : 6800c526:128831d0:fd0d9f7b:be6faef7
                Events : 0
    
        Number   Major   Minor   RaidDevice State
           0       8        0        0      active sync   /dev/sda
           1       8       16        1      active sync   /dev/sdb
           2       8       32        2      active sync   /dev/sdc
           3       8       48        3      active sync   /dev/sdd
           4       8       64        4      active sync   /dev/sde
           5       8       80        5      active sync   /dev/sdf
           6       8       96        6      active sync   /dev/sdg
           7       8      112        7      active sync   /dev/sdh

*  raid0

# cat /proc/mdstat
    Personalities : [raid0] [linear] [multipath] [raid1] [raid6] [raid5] [raid4] [raid10]
    md0 : active raid0 sdd[3] sda[0] sdc[2] sdb[1] sdh[7] sdg[6] sde[4] sdf[5]
          62511153152 blocks super 1.2 512k chunks
    
    unused devices: <none>

# cat /etc/mdadm/mdadm.conf
    ARRAY /dev/md0 metadata=1.2 name=ubuntu-server:0 UUID=6800c526:128831d0:fd0d9f7b:be6faef7
    MAILADDR root

# df -Th
    /dev/md0p1     ext4       58T  100K   56T   1% /chain

umount /chain

# 2，删除 #

# mdadm -S /dev/md0
    mdadm: stopped /dev/md0

# lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
    NAME          SIZE FSTYPE            TYPE MOUNTPOINT
    sda           7.3T linux_raid_member disk
    sdb           7.3T linux_raid_member disk
    sdc           7.3T linux_raid_member disk
    sdd           7.3T linux_raid_member disk
    sde           7.3T linux_raid_member disk
    sdf           7.3T linux_raid_member disk
    sdg           7.3T linux_raid_member disk
    sdh           7.3T linux_raid_member disk

# cat /etc/mdadm/mdadm.conf
    ARRAY /dev/md0 metadata=1.2 name=ubuntu-server:0 UUID=6800c526:128831d0:fd0d9f7b:be6faef7
    MAILADDR root
    # cat /dev/null > /etc/mdadm/mdadm.conf

*  删除元数据

# mdadm --zero-superblock /dev/sda
    # mdadm --zero-superblock /dev/sdb
    # mdadm --zero-superblock /dev/sdc
    # mdadm --zero-superblock /dev/sdd

# lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
    NAME          SIZE FSTYPE            TYPE MOUNTPOINT
    sda           7.3T                   disk
    sdb           7.3T                   disk
    sdc           7.3T                   disk
    sdd           7.3T                   disk
    sde           7.3T                   disk
    sdf           7.3T linux_raid_member disk
    sdg           7.3T linux_raid_member disk
    sdh           7.3T linux_raid_member disk

--------------------

参考：

1.  [mdadm彻底删除software RAID][mdadm_software RAID]

[mdadm_software RAID]: https://blog.csdn.net/chenyouxu/article/details/47415985