利用mdadm工具构建RAID 0 1 5 6 10磁盘阵列实战（超详细）_mdadm raid5 重构

最新推荐文章于 2025-04-12 15:30:59 发布

2401_84715997

最新推荐文章于 2025-04-12 15:30:59 发布

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分类专栏：程序员文章标签：单元测试功能测试学习

本文链接：https://blog.youkuaiyun.com/2401_84715997/article/details/138654220

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Failed Devices : 0
 Spare Devices : 1

Consistency Policy : resync

 Resync Status : 77% complete

          Name : localhost.localdomain:1  (local to host localhost.localdomain)
          UUID : 98b76e6e:b6390011:26a822a8:3dcc4cc9
        Events : 12

Number   Major   Minor   RaidDevice State
   0       8       49        0      active sync   /dev/sdd1
   1       8       65        1      active sync   /dev/sde1

   2       8       17        -      spare   /dev/sdb1


3.格式化并挂载

[root@localhost ~]# mkfs.xfs /dev/md1

[root@localhost ~]# blkid /dev/md1
/dev/md1: UUID=“18a8f33b-1bb6-43c2-8dfc-2b21a871961a” TYPE=“xfs”

[root@localhost ~]# mkdir /raid1

[root@localhost ~]# mount /dev/md1 /raid1/

[root@localhost ~]# df -h
文件系统容量已用可用已用% 挂载点
/dev/mapper/centos-root 17G 11G 6.7G 61% /
…
/dev/md1 20G 33M 20G 1% /raid1


## 4.模拟磁盘损坏


模拟损坏后查看RAID1阵列详细信息，发现/dev/sdb1自动替换了损坏的/dev/sdd1磁盘。

[root@localhost ~]# mdadm /dev/md1 -f /dev/sdd1

[root@localhost ~]# mdadm -D /dev/md1 //查看
/dev/md1:
Version : 1.2
Creation Time : Tue Apr 21 16:11:16 2020
Raid Level : raid1
Array Size : 20953088 (19.98 GiB 21.46 GB)
Used Dev Size : 20953088 (19.98 GiB 21.46 GB)
Raid Devices : 2
Total Devices : 3
Persistence : Superblock is persistent

   Update Time : Tue Apr 21 16:29:38 2020
         State : clean, degraded, recovering //正在自动恢复
Active Devices : 1

Working Devices : 2
Failed Devices : 1 //已损坏的磁盘
Spare Devices : 1 //备用设备数

Consistency Policy : resync

Rebuild Status : 46% complete

          Name : localhost.localdomain:1  (local to host localhost.localdomain)
          UUID : 98b76e6e:b6390011:26a822a8:3dcc4cc9
        Events : 26

Number   Major   Minor   RaidDevice State
   2       8       17        0      spare rebuilding   /dev/sdb1
   1       8       65        1      active sync   /dev/sde1

   0       8       49        -      faulty   /dev/sdd1

****** 备用磁盘正在自动替换损坏的磁盘，等几分钟再查看RAID1阵列详细信息

[root@localhost ~]# mdadm -D /dev/md1
/dev/md1:
Version : 1.2
Creation Time : Tue Apr 21 16:11:16 2020
Raid Level : raid1
Array Size : 20953088 (19.98 GiB 21.46 GB)
Used Dev Size : 20953088 (19.98 GiB 21.46 GB)
Raid Devices : 2
Total Devices : 3
Persistence : Superblock is persistent

   Update Time : Tue Apr 21 16:30:39 2020
         State : clean    //干净，已经替换成功了
Active Devices : 2

Working Devices : 2
Failed Devices : 1 //已损坏的磁盘
Spare Devices : 0 //备用设备数为0了

Consistency Policy : resync

          Name : localhost.localdomain:1  (local to host localhost.localdomain)
          UUID : 98b76e6e:b6390011:26a822a8:3dcc4cc9
        Events : 36

Number   Major   Minor   RaidDevice State
   2       8       17        0      active sync   /dev/sdb1
   1       8       65        1      active sync   /dev/sde1

   0       8       49        -      faulty   /dev/sdd1