is this an error? about suspend-usb-device HOT 2 OPEN

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.

from suspend-usb-device.

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.

from suspend-usb-device.