不用重启识别新添加的硬盘

1.已经往改系统添加了100g的硬盘（/dev/sdd），但输入下面命令好像没有显示

[root@NSDZHNCDB01 ~]# fdisk -l

Disk /dev/sda: 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: 0x000bc81a

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          64      512000   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              64        6528    51915776   8e  Linux LVM

Disk /dev/sdc: 343.6 GB, 343597383680 bytes
255 heads, 63 sectors/track, 41773 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: 0x90cfd4ab

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1       41773   335541591   8e  Linux LVM

Disk /dev/sdb: 322.1 GB, 322122547200 bytes
255 heads, 63 sectors/track, 39162 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: 0xf13a1ced

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1       39162   314568733+  8e  Linux LVM

Disk /dev/mapper/vg_nsdzhncdb01-lv_root: 47.8 GB, 47789899776 bytes
255 heads, 63 sectors/track, 5810 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


Disk /dev/mapper/vg_nsdzhncdb01-lv_swap: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 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


Disk /dev/mapper/vg_software-lv_software: 342.5 GB, 342523641856 bytes
255 heads, 63 sectors/track, 41642 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


Disk /dev/mapper/vg_data-lv_data: 321.0 GB, 321048805376 bytes
255 heads, 63 sectors/track, 39031 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

[root@NSDZHNCDB01 night]# ls /dev/sd*
/dev/sda  /dev/sda1  /dev/sda2  /dev/sdb  /dev/sdb1  /dev/sdc  /dev/sdc1 

2.查看主机总线号

[root@NSDZHNCDB01 night]# ls /sys/class/scsi_host/
host0  host1  host2

3.重新扫描SCSI总线来添加设备

[root@NSDZHNCDB01 night]# echo "- - -" > /sys/class/scsi_host/host0/scan
[root@NSDZHNCDB01 night]# echo "- - -" > /sys/class/scsi_host/host1/scan
[root@NSDZHNCDB01 night]# echo "- - -" > /sys/class/scsi_host/host2/scan
[root@NSDZHNCDB01 night]# fdisk -l

Disk /dev/sda: 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: 0x000bc81a

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          64      512000   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              64        6528    51915776   8e  Linux LVM

Disk /dev/sdc: 343.6 GB, 343597383680 bytes
255 heads, 63 sectors/track, 41773 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: 0x90cfd4ab

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1       41773   335541591   8e  Linux LVM

Disk /dev/sdb: 322.1 GB, 322122547200 bytes
255 heads, 63 sectors/track, 39162 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: 0xf13a1ced

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1       39162   314568733+  8e  Linux LVM

Disk /dev/mapper/vg_nsdzhncdb01-lv_root: 47.8 GB, 47789899776 bytes
255 heads, 63 sectors/track, 5810 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


Disk /dev/mapper/vg_nsdzhncdb01-lv_swap: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 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


Disk /dev/mapper/vg_software-lv_software: 342.5 GB, 342523641856 bytes
255 heads, 63 sectors/track, 41642 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


Disk /dev/mapper/vg_data-lv_data: 321.0 GB, 321048805376 bytes
255 heads, 63 sectors/track, 39031 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


Disk /dev/sdd: 107.4 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 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

[root@NSDZHNCDB01 night]# ^C
[root@NSDZHNCDB01 night]# ^C
[root@NSDZHNCDB01 night]# ls /dev/sd*
/dev/sda  /dev/sda1  /dev/sda2  /dev/sdb  /dev/sdb1  /dev/sdc  /dev/sdc1  /dev/sdd
[root@NSDZHNCDB01 night]#