when its not connected:

[ 2080.302545] sd 14:0:0:0: [sdb] Sense not available.
[ 2080.302628] sd 14:0:0:0: [sdb] Write Protect is off
[ 2080.302635] sd 14:0:0:0: [sdb] Mode Sense: 2e 2e 2f 2e
[ 2080.302668] sd 14:0:0:0: [sdb] Asking for cache data failed
[ 2080.302672] sd 14:0:0:0: [sdb] Assuming drive cache: write through
[ 2080.303032] sd 14:0:0:0: [sdb] Read Capacity(16) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[ 2080.303038] sd 14:0:0:0: [sdb] Sense not available.
[ 2080.303094] sd 14:0:0:0: [sdb] Read Capacity(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[ 2080.303099] sd 14:0:0:0: [sdb] Sense not available.
[ 2080.303133] sd 14:0:0:0: [sdb] Attached SCSI disk



when its connected:

[ 2138.610026] usb 3-1.2: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 2138.610029] usb 3-1.2: Product: Silicon-Power
[ 2138.610033] usb 3-1.2: Manufacturer: PHD 3.0
[ 2138.610036] usb 3-1.2: SerialNumber: 1500313702421000001B
[ 2138.610621] usb-storage 3-1.2:1.0: USB Mass Storage device detected
[ 2138.610907] usb-storage 3-1.2:1.0: Quirks match for vid 174c pid 55aa: 400000
[ 2138.610994] scsi host15: usb-storage 3-1.2:1.0
[ 2139.608785] scsi 15:0:0:0: Direct-Access     PHD 3.0  Silicon-Power    0    PQ: 0 ANSI: 6
[ 2139.609732] sd 15:0:0:0: Attached scsi generic sg2 type 0
[ 2139.613504] sd 15:0:0:0: [sdb] Spinning up disk...