近期湖北某某机房上线了［极速IO/云硬盘］ 物理机
我们开通一台 输入fdisk -l 查看

[root@S202510114135 ~]# fdisk -l
Disk /dev/sdb: 1073.7 GB, 1073741824000 bytes, 2097152000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 524288 bytes
Disk label type: dos
Disk identifier: 0x531b171d

Device Boot Start End Blocks Id System
/dev/sdb1 2048 2097151999 1048574976 83 Linux

Disk /dev/sdc: 1073.7 GB, 1073741824000 bytes, 2097152000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 524288 bytes
Disk label type: dos
Disk identifier: 0x531b171d

Device Boot Start End Blocks Id System
/dev/sdc1 2048 2097151999 1048574976 83 Linux

Disk /dev/mapper/mpatha: 1073.7 GB, 1073741824000 bytes, 2097152000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 524288 bytes
Disk label type: dos
Disk identifier: 0x531b171d

         Device Boot      Start         End      Blocks   Id  System

/dev/mapper/mpatha1 2048 2097151999 1048574976 83 Linux

[root@S202510114135 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 223.6G 0 disk
├─sda1 8:1 0 1000M 0 part /boot
├─sda2 8:2 0 15.6G 0 part [SWAP]
└─sda3 8:3 0 207G 0 part /
sdb 8:16 0 1000G 0 disk
└─mpatha 253:0 0 1000G 0 mpath
└─mpatha1 253:1 0 1000G 0 part
sdc 8:32 0 1000G 0 disk
└─mpatha 253:0 0 1000G 0 mpath
└─mpatha1 253:1 0 1000G 0 part

跟往常不一样的是 我们查看到 数据盘是由两块1T的磁盘组成的1T /dev/sdb /dev/sdc 组成了/dev/mapper/mpatha1
实际上 这是一种多路径网络磁盘技术
磁盘的读写会从两个网口走 解决网口速率瓶颈的问题
这种我们只需要挂载/dev/mapper/mpatha1这个磁盘即可
写入挂载文件时注意
/dev/mapper/mpatha1 /data ext4 defaults,_netdev 0 0
defaults后需要添加“,_netdev” 因为依赖网络 所以需要网络启动后再挂载磁盘

如果不加入“,_netdev” 会进入emergency model 无法开机。