标签：列块 raid1 date level local localhost nts xfs 配置文件
如上添加硬盘
raid 0
[root@localhost ~]# mdadm -C -v /dev/md0 -l 0 -n 2 /dev/sdb /dev/sdc
mdadm: chunk size defaults to 512K
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md0 started.
-C 创建一个新阵列
-v 显示详细信息
-l 设定磁盘阵列的等级
-n 设定阵列的成员
[root@localhost ~]# mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Fri Oct 4 18:49:02 2019
Raid Level : raid0
Array Size : 10475520 (9.99 GiB 10.73 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Fri Oct 4 18:49:02 2019
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Chunk Size : 512K
Consistency Policy : none
Name : localhost.localdomain:0 (local to host localhost.localdomain)
UUID : b9e04e06:5aac7e99:25a0a306:58fded53
Events : 0
Number Major Minor RaidDevice State
0 8 16 0 active sync /dev/sdb
1 8 32 1 active sync /dev/sdc
[root@localhost ~]# mdadm -Dsv > /etc/mdadm.conf #生成配置文件
[root@localhost ~]# mkfs.xfs /dev/md0 #格式化
[root@localhost ~]# mkdir /raid0 #挂载
[root@localhost ~]# df -h
文件系统 容量 已用 可用 已用% 挂载点
/dev/md0 10G 33M 10G 1% /raid0
[root@localhost ~]# echo 123456 >> /raid0/aaa.txt
[root@localhost ~]# cat /raid0/aaa.txt
123456
[root@localhost ~]# blkid /dev/md0
/dev/md0: UUID="c4096f03-259b-44b3-88be-a6909315e591" TYPE="xfs"
[root@localhost ~]# echo "UUID=c4096f03-259b-44b3-88be-a6909315e591 /raid0/ xfs defaults 0 0" >> /etc/fstab #将/dev/md0追加到/etc/fstab下，开机自动挂载
[root@localhost ~]# umount /raid0/
[root@localhost ~]# mount -a
RAID1
1）创建RAID1
[root@localhost ~]# mdadm -C -v /dev/md1 -l 1 -n 2 -x 1 /dev/sd[d,e,f]
mdadm: Note: this array has metadata at the start and
may not be suitable as a boot device. If you plan to
store ‘/boot‘ on this device please ensure that
your boot-loader understands md/v1.x metadata, or use
--metadata=0.90
mdadm: size set to 5237760K
Continue creating array? y
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md1 started.
[root@localhost ~]# mdadm -Dsv > /etc/mdadm.conf #生成配置文件
[root@localhost ~]# mdadm -D /dev/md1
/dev/md1:
Version : 1.2
Creation Time : Fri Oct 4 20:27:46 2019
Raid Level : raid1
Array Size : 5237760 (5.00 GiB 5.36 GB)
Used Dev Size : 5237760 (5.00 GiB 5.36 GB)
Consistency Policy : resync
Name : localhost.localdomain:1 (local to host localhost.localdomain)
UUID : 163d85c1:eabfbf27:507cad66:60017d38
Events : 17
Number Major Minor RaidDevice State
0 8 48 0 active sync /dev/sdd
1 8 64 1 active sync /dev/sde
2 8 80 - spare /dev/sdf
[root@localhost ~]# mkfs.xfs /dev/md1 #格式化
[root@localhost ~]# mkdir /raid1
[root@localhost ~]# mount /dev/md1 /raid1
[root@localhost ~]# cp /etc/passwd /raid1
[root@localhost ~]# cp -r /boot/grub /raid1
[root@localhost ~]# cp -r /etc/ /raid1/
[root@localhost ~]# df -h
/dev/md1 5.0G 75M 5.0G 2% /raid1
2）模拟故障
[root@localhost ~]# mdadm /dev/md1 -f /dev/sdd
mdadm: set /dev/sdd faulty in /dev/md1
[root@localhost ~]# mdadm -D /dev/md1
Number Major Minor RaidDevice State
2 8 80 0 active sync /dev/sdf
1 8 64 1 active sync /dev/sde
0 8 48 - faulty /dev/sdd #热备盘顶上
[root@localhost raid1]# mdadm -Dsv > /etc/mdadm.conf
[root@localhost ~]# mdadm -r /dev/md1 /dev/sdd #移除损坏的磁盘
3）添加热备盘
[root@localhost ~]# mdadm -a /dev/md1 /dev/sdd #添加热备盘
RAID5
1）创建RAID5，添加热备盘，制定chunk大小为32K
-x或--spare-devicds= 制定阵列中备用盘的数量
-c或--chunk= 设定阵列块chunk块的大小，单位为KB
[root@localhost ~]# mdadm -C -v /dev/md5 -l 5 -n 3 -x 1 -c32 /dev/sd[g,h,i,j]
[root@localhost ~]# mdadm -D /dev/md5
/dev/md5:
Version : 1.2
Creation Time : Fri Oct 4 20:59:12 2019
Raid Level : raid5
Array Size : 10475520 (9.99 GiB 10.73 GB)
Used Dev Size : 5237760 (5.00 GiB 5.36 GB)
Raid Devices : 3
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Fri Oct 4 20:59:23 2019
State : clean, degraded, recovering
Active Devices : 2
Working Devices : 4
Failed Devices : 0
Spare Devices : 2
Layout : left-symmetric
Chunk Size : 32K
Consistency Policy : resync
Rebuild Status : 97% complete #正在同步
Name : localhost.localdomain:5 (local to host localhost.localdomain)
UUID : 137e891d:8ba777fe:59d16fdf:9a5c68b4
Events : 16
Number Major Minor RaidDevice State
0 8 96 0 active sync /dev/sdg
1 8 112 1 active sync / dev/sdh
4 8 128 2 spare rebuilding /dev/sdi
3 8 144 - spare /dev/sdj #热备盘
2）停止阵列，重新激活阵列
[root@localhost ~]# mdadm -S /dev/md5 #停止阵列
mdadm: stopped /dev/md5
[root@localhost ~]# mdadm -As #会加载/etc/mdadm.conf文件来激活raid5
mdadm: /dev/md5 has been started with 3 drives and 1 spare.
3）使用热备盘，扩展阵列容量，从3个磁盘扩展到4个磁盘
[root@localhost ~]# mdadm -G /dev/md5 -n4 -c 32
-G或--grow 改变阵列大小或形态
[root@localhost ~]# mdadm -D /dev/md5
#待同步完毕
Number Major Minor RaidDevice State
0 8 96 0 active sync /dev/sdg
1 8 112 1 active sync /dev/sdh
4 8 128 2 active sync /dev/sdi
3 8 144 3 active sync /dev/sdj
RAID10
省略分区步骤。。。。。
[root@localhost ~]# ls /dev/sdk*
/dev/sdk /dev/sdk1 /dev/sdk2 /dev/sdk3 /dev/sdk4
[root@localhost ~]# mdadm -C -v /dev/md10 -l 10 -n 4 /dev/sdk[1-4]
[root@localhost ~]# mdadm -Dsv > /etc/mdadm.conf
[root@localhost ~]# mdadm -D /dev/md10
Number Major Minor RaidDevice State
0 8 161 0 active sync set-A /dev/sdk1
1 8 162 1 active sync set-B /dev/sdk2
2 8 163 2 active sync set-A /dev/sdk3
3 8 164 3 active sync set-B /dev/sdk4
---------------------------------------------------------------------------
清除阵列
[root@localhost ~]# umount /dev/md0 /raid0
[root@localhost ~]# mdadm -Ss
[root@localhost ~]# mdadm --zero-superblock /dev/sdb
[root@localhost ~]# mdadm --zero-superblock /dev/sdc
标签：列块 raid1 date level local localhost nts xfs 配置文件
原文地址：https://www.cnblogs.com/zsg-cdhk/p/11623410.html
