9.04不能挂载USB设备

[peigen]

peigen:/usr/bin$ dmesg 命令后,看到我的设备已经找到了啊...之前还可以,怎么突然就不行了

usb 3-1: USB disconnect, address 4
[34861.540107] usb 3-1: new full speed USB device using uhci_hcd and address 5
[34861.715335] usb 3-1: configuration #1 chosen from 1 choice
[34861.722243] scsi5 : SCSI emulation for USB Mass Storage devices
[34861.722442] usb-storage: device found at 5
[34861.722448] usb-storage: waiting for device to settle before scanning
[34866.722463] usb-storage: device scan complete
[34866.725423] scsi 5:0:0:0: Direct-Access RIM Blackberry SD 0001 PQ: 0 ANSI: 4 CCS
[34866.732414] sd 5:0:0:0: [sdb] Attached SCSI removable disk
[34866.732905] sd 5:0:0:0: Attached scsi generic sg2 type 0
[35598.336116] usb 3-1: USB disconnect, address 5
[35604.888092] usb 3-1: new full speed USB device using uhci_hcd and address 6
[35605.065265] usb 3-1: configuration #1 chosen from 1 choice
[35605.072092] scsi6 : SCSI emulation for USB Mass Storage devices
[35605.072623] usb-storage: device found at 6
[35605.072629] usb-storage: waiting for device to settle before scanning
[35610.075174] usb-storage: device scan complete
[35610.078163] scsi 6:0:0:0: Direct-Access RIM Blackberry SD 0001 PQ: 0 ANSI: 4 CCS
[35610.083428] sd 6:0:0:0: [sdb] Attached SCSI removable disk
[35610.083567] sd 6:0:0:0: Attached scsi generic sg2 type 0


我在笔记本上使用,所以sda的设备是笔记本的硬盘我尝试下面的方法
peigen:/dev$ file sdb
sdb: block special

peigen:/usr/bin$ cd /dev
peigen:/dev$ sudo mount -t auto -o iocharset=cp936 /dev/sdb /media/blackberry
mount: /dev/sdb: 未知设备