Ubuntu 18.04 安装 mdadm 搭建 raid0

刺骨的言语ヽ痛彻心扉 2022-10-23 09:55 229阅读 0赞

### Ubuntu 18.04 安装 mdadm 搭建 raid0 ###

*  安装 mdadm
 *  创建 raid0
 *   *  /dev/md0
     *  /dev/md1
 *  开机自动挂载
 *  删除 raid0
 *  ~~扩容~~

# 安装 mdadm #

# cat /etc/issue
    Ubuntu 18.04.5 LTS \n \l

apt install -y mdadm

# 创建 raid0 #

lsblk

mkfs.ext4 /dev/nvme1n1

mkfs.ext4 /dev/nvme2n1

*  创建raid0

mdadm -C -v /dev/md0 -l 0 -n 2 /dev/nvme1n1 /dev/nvme2n1

## /dev/md0 ##

mdadm -C -v /dev/md0 --chunk=4096 -l 0 -n 2 /dev/nvme1n1 /dev/nvme2n1

mkfs.ext4 /dev/md0

*  `vim /etc/fstab`

/dev/md0 /mnt/md0 auto nosuid,nodev,nofail 0 0

mdadm -Dsv >> /etc/mdadm.conf

*  查看阵列信息

cat /proc/mdstat

## /dev/md1 ##

mdadm -C -v /dev/md1 --chunk=4096 -l 0 -n 2 /dev/nvme3n1 /dev/nvme4n1

mkfs.ext4 /dev/md1

# cat /proc/mdstat
    Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
    md0 : active raid0 nvme2n1[1] nvme1n1[0]
          15002667008 blocks super 1.2 512k chunks
    
    unused devices: <none>

# mdadm -Ds
    ARRAY /dev/md0 metadata=1.2 name=k186:0 UUID=51edcf15:c5a2f42d:4a8852e3:8225e9fa

# mdadm -D /dev/md0
    /dev/md0:
               Version : 1.2
         Creation Time : Mon Mar  8 16:22:47 2021
            Raid Level : raid0
            Array Size : 15002667008 (14307.66 GiB 15362.73 GB)
          Raid Devices : 2
         Total Devices : 2
           Persistence : Superblock is persistent
    
           Update Time : Mon Mar  8 16:22:47 2021
                 State : clean
        Active Devices : 2
       Working Devices : 2
        Failed Devices : 0
         Spare Devices : 0
    
            Chunk Size : 512K
    
    Consistency Policy : none
    
                  Name : k186:0  (local to host k186)
                  UUID : 51edcf15:c5a2f42d:4a8852e3:8225e9fa
                Events : 0
    
        Number   Major   Minor   RaidDevice State
           0     259        0        0      active sync   /dev/nvme1n1
           1     259        5        1      active sync   /dev/nvme2n1

*  格式化磁盘

mkfs.xfs /dev/md0

# 开机自动挂载 #

# blkid /dev/md0
    /dev/md0: UUID="07d15fcc-121b-49f6-b723-152fddec509d" TYPE="xfs"

vim /etc/fstab

# raid0
    /dev/disk/by-uuid/07d15fcc-121b-49f6-b723-152fddec509d /seal xfs defaults 0 0

mount /seal/

df -Th

# hdparm -Tt /dev/md0
    
    /dev/md0:
     Timing cached reads:   21874 MB in  2.00 seconds = 10950.61 MB/sec
     Timing buffered disk reads: 188 MB in  3.02 seconds =  62.29 MB/sec

# 删除 raid0 #

umount /mnt/md0

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

*  删除配置

vim /etc/mdadm.conf

mdadm --zero-superblock /dev/nvme2n1

mdadm --zero-superblock /dev/nvme3n1

mdadm --zero-superblock /dev/nvme4n1

# 扩容 #

*  创建raid0

mdadm --create --verbose /dev/md0 --chunk=4096 --level=0 --raid-devices=3 /dev/nvme1n1 /dev/nvme2n1  /dev/nvme3n1

*  查看raid0详细信息