usb数码伴侣不能在sid下以2.0的标准工作,但是
1,如果用usb hub转接一下就可以了不过是1.1的标准，
2,或者在MS windows下可以直接工作在2.0的标准下（同样的接口同样的硬件）
是不是Linux的USB还是不太完善？
而且如果识别数码伴侣失败以后，整个计算机的usb好象都失效了，再插别的设备都没有反应了，�
挥衦eset。
ps x
3291 ? D 0:00 [scsi_eh_1]
3292 ? S 0:00 [usb-storage]
kernel2.6.8,当插上数码伴侣的时候，kernel log
Apr 25 15:07:00 debian kernel: usb 4-1: new high speed USB device using address 3
Apr 25 15:07:03 debian kernel: scsi0 : SCSI emulation for USB Mass Storage devices
Apr 25 15:07:03 debian kernel: Vendor: PANOCEAN Model: DC PARTNER 0V2.1 Rev: 0001
Apr 25 15:07:03 debian kernel: Type: Direct-Access ANSI SCSI
revision: 02
Apr 25 15:07:03 debian kernel: Vendor: PANOCEAN Model: DC PARTNER 1V2.1 Rev: 0001
Apr 25 15:07:03 debian kernel: Type: Direct-Access ANSI SCSI
revision: 02
Apr 25 15:07:03 debian kernel: Vendor: PANOCEAN Model: DC PARTNER 2V2.1 Rev: 0001
Apr 25 15:07:03 debian kernel: Type: Direct-Access ANSI SCSI
revision: 02
Apr 25 15:07:03 debian kernel: SCSI device sda: 78140160 512-byte hdwr sectors (40008
MB)
Apr 25 15:07:04 debian scsi.agent[3095]: sd_mod: loaded sucessfully (for disk)
Apr 25 15:07:04 debian scsi.agent[3108]: sd_mod: loaded sucessfully (for disk)
Apr 25 15:08:32 debian kernel: /dev/scsi/host0/bus0/target0/lun0:
等待很长时间，然后
<6>usb 4-1: reset high speed USB device using address 3
Apr 25 15:08:32 debian kernel: usb 4-1: device firmware changed
Apr 25 15:08:32 debian kernel: scsi: Device offlined - not ready after error recovery:
host 0 channel 0 id 0 lun 0
Apr 25 15:08:32 debian kernel: SCSI error : <0 0 0 0> return code = 0x50000
Apr 25 15:08:32 debian kernel: end_request: I/O error, dev sda, sector 0
Apr 25 15:08:32 debian kernel: unable to read partition table
Apr 25 15:08:32 debian kernel: Attached scsi disk sda at scsi0, channel 0, id 0, lun
0
Apr 25 15:08:32 debian kernel: usb 4-1: USB disconnect, address 3
Apr 25 15:09:02 debian kernel: scsi: Device offlined - not ready after error recovery:
host 0 channel 0 id 0 lun 1
Apr 25 15:09:02 debian kernel: sdb : READ CAPACITY failed.
Apr 25 15:09:02 debian kernel: sdb : status=0, message=00, host=0, driver=06
Apr 25 15:09:02 debian kernel: sdb : sense not available.
Apr 25 15:09:02 debian kernel: sdb: assuming Write Enabled
Apr 25 15:09:02 debian kernel: Attached scsi removable disk sdb at scsi0, channel 0,
id 0, lun 1
Apr 25 15:09:32 debian scsi.agent[3121]: sd_mod: loaded sucessfully (for disk)
Apr 25 15:09:32 debian kernel: scsi: Device offlined - not ready after error recovery:
host 0 channel 0 id 0 lun 2
Apr 25 15:09:32 debian kernel: sdc : READ CAPACITY failed.
Apr 25 15:09:32 debian kernel: sdc : status=0, message=00, host=0, driver=06
Apr 25 15:09:32 debian kernel: sdc : sense not available.
Apr 25 15:09:02 debian kernel: sdb: assuming Write Enabled
Apr 25 15:09:02 debian kernel: Attached scsi removable disk sdb at scsi0, channel 0,
id 0, lun 1
Apr 25 15:09:32 debian scsi.agent[3121]: sd_mod: loaded sucessfully (for disk)
Apr 25 15:09:32 debian kernel: scsi: Device offlined - not ready after error recovery:
host 0 channel 0 id 0 lun 2
Apr 25 15:09:32 debian kernel: sdc : READ CAPACITY failed.
Apr 25 15:09:32 debian kernel: sdc : status=0, message=00, host=0, driver=06
Apr 25 15:09:32 debian kernel: sdc : sense not available.
Apr 25 15:09:32 debian kernel: sdc: assuming Write Enabled
Apr 25 15:09:32 debian kernel: Attached scsi removable disk sdc at scsi0, channel 0,
id 0, lun 2
Apr 25 15:09:32 debian kernel: usb 4-1: new high speed USB device using address 4
Apr 25 15:09:33 debian kernel: scsi1 : SCSI emulation for USB Mass Storage devices
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