scsi_id问题

hxl

硬盘信息如下：
[root@node1 ~]# fdisk -l

Disk /dev/sda: 32.4 GB, 32428654592 bytes
255 heads, 63 sectors/track, 3942 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: 0x0000eab1

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        3570    28672000   83  Linux
/dev/sda2            3570        3943     2995200   82  Linux swap / Solaris

Disk /dev/sdb: 1181 MB, 1181947904 bytes
255 heads, 63 sectors/track, 143 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/sdc: 1181 MB, 1181947904 bytes
255 heads, 63 sectors/track, 143 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: 1181 MB, 1181947904 bytes
255 heads, 63 sectors/track, 143 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


scsi_id -g -u -s /block/sdb
scsi_id -g -u -s /block/sdc
scsi_id -g -u -s /block/sdd
为什么没有任何输出呢？

q1208c

By  default  all  devices  are  assumed black listed, the --whitelisted
       option must be specified on the command line or in the config file  for
       any useful behaviour.