Vmware扩展磁盘如何不需重启系统

[root@localhost ~]# fdisk -l

Disk /dev/sda: 171.7 GB, 171798691840 bytes

255 heads, 63 sectors/track, 20886 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *           1          13      104391   83  Linux

/dev/sda2              14       15665   125724690   8e  Linux LVM

/dev/sda3           15666       15795     1044225   83  Linux

/dev/sda4           15796       20886    40893457+  83  Linux

Disk /dev/dm-0: 126.6 GB, 126600871936 bytes

255 heads, 63 sectors/track, 15391 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/dm-0 doesn't contain a valid partition table

Disk /dev/dm-1: 2113 MB, 2113929216 bytes

255 heads, 63 sectors/track, 257 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/dm-1 doesn't contain a valid partition table

[root@localhost ~]# cd /sys/class/scsi_disk/

[root@localhost scsi_disk]# ls

0:0:0:0

[root@localhost scsi_disk]# cd 0\:0\:0\:0/

[root@localhost 0:0:0:0]# echo '1' > device/rescan 

[root@localhost 0:0:0:0]# fdisk -l

Disk /dev/sda: 173.9 GB, 173946175488 bytes

255 heads, 63 sectors/track, 21147 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *           1          13      104391   83  Linux

/dev/sda2              14       15665   125724690   8e  Linux LVM

/dev/sda3           15666       15795     1044225   83  Linux

/dev/sda4           15796       20886    40893457+  83  Linux

Disk /dev/dm-0: 126.6 GB, 126600871936 bytes

255 heads, 63 sectors/track, 15391 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/dm-0 doesn't contain a valid partition table

Disk /dev/dm-1: 2113 MB, 2113929216 bytes

255 heads, 63 sectors/track, 257 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/dm-1 doesn't contain a valid partition table

[root@localhost ~]# echo 1 > /sys/block/sda/device/rescan

[root@localhost ~]# grep mpt /sys/class/scsi_host/host?/proc_name

/sys/class/scsi_host/host0/proc_name:mptspi

[root@localhost ~]# echo "- - -" > /sys/class/scsi_host/host0/scan