linux 添加硬盤如何不重啓
1. 添加了磁盤後查看，沒有刷新出來
[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. 查看主機總線號
root@node /]# ls /sys/class/scsi_host/
host0 host1 host2
3.重新掃描SCSI總線來添加設備
[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. 查看磁盤，可以看到 /dev/sdb :53.7G 這個就是新加的盤
[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
接下來
fdisk /dev/sd*
n
p
1
回車
回車
w保存
mkfs.ext4 /dev/sdc1 建立EXT4文件系統
mount /dev/sdc1 /data_bak 掛載
vim /etc/fstab
/dev/sdc1 /data_bak ext4 defaults 0 0
X保存
mount -a 刷新fstab裏的配置，查看配置文件收否寫錯。