linux 添加硬盘如何不重启

1. 添加了磁盘后查看，没有刷新出来

[root@node /]# fdisk -l

Disk /dev/sda: 17.2 GB, 17179869184 bytes
255 heads, 63 sectors/track, 2088 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000aa84a

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        2089    16775168   83  Linux
/dev/sda2            2089        2089        1024   82  Linux swap / Solaris

2. 查看主机总线号

root@node /]# ls /sys/class/scsi_host/
host0  host1  host2

3.重新扫描SCSI总线来添加设备

[root@node /]# echo "- - -" > /sys/class/scsi_host/host0/scan
[root@node /]# echo "- - -" > /sys/class/scsi_host/host1/scan
[root@node /]# echo "- - -" > /sys/class/scsi_host/host2/scan

4. 查看磁盘，可以看到 /dev/sdb :53.7G 这个就是新加的盘

[root@node /]# fdisk -l

Disk /dev/sda: 17.2 GB, 17179869184 bytes
255 heads, 63 sectors/track, 2088 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000aa84a

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        2089    16775168   83  Linux
/dev/sda2            2089        2089        1024   82  Linux swap / Solaris

Disk /dev/sdb: 53.7 GB, 53687091200 bytes
255 heads, 63 sectors/track, 6527 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

接下来

fdisk /dev/sd*

n

p

1

回车

回车

w保存

mkfs.ext4 /dev/sdc1  建立EXT4文件系统

mount /dev/sdc1 /data_bak 挂载

vim /etc/fstab 

/dev/sdc1               /data_bak               ext4    defaults        0 0

X保存

mount -a 刷新fstab里的配置，查看配置文件收否写错。