生产环境有个服务器空间满了，需要扩容为了保证操作流畅提前预演了一下，虽然相关的文章很多了，还是记录一下。

# cat /proc/scsi/scsi    #查看当前通道；
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: VMware,  Model: VMware Virtual S Rev: 1.0
  Type:   Direct-Access                    ANSI  SCSI revision: 02
Host: scsi2 Channel: 00 Id: 00 Lun: 00
  Vendor: NECVMWar Model: VMware IDE CDR10 Rev: 1.00
  Type:   CD-ROM                           ANSI  SCSI revision: 05

# echo "scsi add-single-device 0 0 1 0" > /proc/scsi/scsi        #添加硬盘；
# cat /proc/scsi/scsi         #查看上面的添加是否生效；
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: VMware,  Model: VMware Virtual S Rev: 1.0
  Type:   Direct-Access                    ANSI  SCSI revision: 02
Host: scsi2 Channel: 00 Id: 00 Lun: 00
  Vendor: NECVMWar Model: VMware IDE CDR10 Rev: 1.00
  Type:   CD-ROM                           ANSI  SCSI revision: 05
Host: scsi0 Channel: 00 Id: 01 Lun: 00
  Vendor: VMware,  Model: VMware Virtual S Rev: 1.0
  Type:   Direct-Access                    ANSI  SCSI revision: 02

# fdisk -l                #检查确认看到了添加的sdb磁盘，接下来分区格式化、挂载即可；

Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 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: 0x000a0593

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          66      524288   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              66        1371    10485760   83  Linux
/dev/sda3            1371        1893     4194304   83  Linux
/dev/sda4            1893        2611     5766144    5  Extended
/dev/sda5            1894        2155     2097152   82  Linux swap / Solaris
/dev/sda6            2155        2611     3666944   83  Linux

Disk /dev/sdb: 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: 0x0000000

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linux不重启添加物理硬盘！