linux centos8硬盘组合为raid0挂载教程
https://cloud.tencent.com/developer/article/1946028
发布于2022-02-23 17:23:23阅读 2840查看硬盘信息
# fdisk -l
Disk /dev/nvme1n1: 7.28 TiB, 8001563222016 bytes, 15628053168 sectors
Disk model: INTEL SSDPE2KX080T8
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 /dev/nvme2n1: 7.28 TiB, 8001563222016 bytes, 15628053168 sectors
Disk model: INTEL SSDPE2KX080T8
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 /dev/nvme3n1: 7.28 TiB, 8001563222016 bytes, 15628053168 sectors
Disk model: INTEL SSDPE2KX080T8
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
组raido
mdadm -Cv /dev/md0 -a yes -n {num} -l 0 /dev/nvme1n1 /dev/nvme2n1 /dev/nvme3n1
//{num}是磁盘数量,所以这里是
mdadm -Cv /dev/md0 -a yes -n 3 -l 0 /dev/nvme1n1 /dev/nvme2n1 /dev/nvme3n1
写入配置
mdadm -Ds >> /etc/mdadm/mdadm.conf
查看组合后的磁盘信息
# fdisk -l
Disk /dev/md0: 21.85 TiB, 24004282810368 bytes, 46883364864 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 524288 bytes / 1572864 bytes
直接格式化分区
mkfs.xfs -f /dev/md0
查看分区ID
# blkid /dev/md0
/dev/md0: UUID="0251496e-8af2-405d-af03-fe72a1891d32" TYPE="xfs"
修改/etc/fstab
文件
vim /etc/fstab
在文件最后用过uuid加上下面这一行
UUID="0251496e-8af2-405d-af03-fe72a1891d32" /ssd xfs defaults 0 0
创建挂载文件夹,mount -a
是挂载/etc/fstab
下未挂载的分区,查看磁盘情况
mkdir /ssd
mount -a
df -h
Filesystem Size Used Avail Use% Mounted on
udev 504G 0 504G 0% /dev
tmpfs 101G 31M 101G 1% /run
/dev/nvme0n1p2 468G 13G 432G 3% /
tmpfs 504G 0 504G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 504G 0 504G 0% /sys/fs/cgroup
/dev/loop0 56M 56M 0 100% /snap/core18/2128
/dev/loop1 71M 71M 0 100% /snap/lxd/21029
/dev/loop2 33M 33M 0 100% /snap/snapd/12704
/dev/nvme0n1p1 511M 5.3M 506M 2% /boot/efi
tmpfs 101G 0 101G 0% /run/user/0
/dev/md0p1 22T 24K 21T 1% /ssd
可以看到三块ssd已经融合挂载成功,由于写入了/etc/fstab,重启依然生效
标签:size,Disk,sectors,bytes,dev,raid0,linux,512,centos8
From: https://www.cnblogs.com/zxdplay/p/17087364.html