is this an error?

[mehturt]

Hi, thanks for a great script, it should do what I was looking for.. I just tested it with my USB disk, and I get this output - is that an error or is the disk powered off (the LED is still on so I think it's not):
$ sudo ./suspend-usb-device -v /dev/sdb
Found device /devices/pci0000:00/0000:00:1d.7/usb2/2-1 associated to /dev/sdb; USB bus id is 2-1
Syncing device /dev/sdb
synchronize cache(10): transport: Host_status=0x07 [DID_ERROR]
Driver_status=0x08 [DRIVER_SENSE, SUGGEST_OK]

Stopping device /dev/sdb
start stop unit: transport: Host_status=0x07 [DID_ERROR]
Driver_status=0x08 [DRIVER_SENSE, SUGGEST_OK]

[liyan]

Sorry for the late reply. I hadn't been monitoring this account. It seemed that your device didn't response to sync and stop in a normal way. For now I can't do much about it since it's likely a device-specific issue. Have you tried other USB devices on that machine? So that we can see whether it's machine-specific or device-specific. Thanks.

[mehturt]

Recently I reinstalled my laptop to Debian, I'm now trying with a different USB disk (WD).
The script output looks better:

Found device /devices/pci0000:00/0000:00:1d.7/usb2/2-1 associated to /dev/sdb; USB bus id is 2-1
Syncing device /dev/sdb
Stopping device /dev/sdb
Unbinding device 2-1
Checking whether /devices/pci0000:00/0000:00:1d.7/usb2/2-1 can be suspended
Suspending /devices/pci0000:00/0000:00:1d.7/usb2/2-1 by writing to /sys/devices/pci0000:00/0000:00:1d.7/usb2/2-1/power/level
But in the /var/log/messages I see:

Sep 30 10:21:59 laptop kernel: [58941.352130] scsi 5:0:0:0: [sdb] Unhandled error code
Sep 30 10:21:59 laptop kernel: [58941.352137] scsi 5:0:0:0: [sdb] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Sep 30 10:21:59 laptop kernel: [58941.352147] scsi 5:0:0:0: [sdb] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
Is that ok?
Btw when I get a chance I'll retry with the disk that I got the errors previously.