dmesg

[  151.144350] usb 1-1.2.2: new high-speed USB device number 5 using dwc_otg
[  151.246060] usb 1-1.2.2: New USB device found, idVendor=125f, idProduct=a93a
[  151.246091] usb 1-1.2.2: New USB device strings: Mfr=1, Product=3, SerialNumber=2
[  151.246106] usb 1-1.2.2: Product: Portable HDD SH93
[  151.246118] usb 1-1.2.2: Manufacturer: ADATA
[  151.246131] usb 1-1.2.2: SerialNumber: SH0560923011
[  151.255357] scsi0 : usb-storage 1-1.2.2:1.0
[  152.255925] scsi 0:0:0:0: Direct-Access     ADATA    HDD SH93              PQ: 0 ANSI: 0
[  152.262115] sd 0:0:0:0: [sda] 976773168 512-byte logical blocks: (500 GB/465 GiB)
[  152.262751] sd 0:0:0:0: [sda] Write Protect is off
[  152.262780] sd 0:0:0:0: [sda] Mode Sense: 03 00 00 00
[  152.263372] sd 0:0:0:0: [sda] No Caching mode page present
[  152.263398] sd 0:0:0:0: [sda] Assuming drive cache: write through
[  152.266500] sd 0:0:0:0: [sda] No Caching mode page present
[  152.266529] sd 0:0:0:0: [sda] Assuming drive cache: write through
[  152.291697]  sda: sda1
[  152.307134] sd 0:0:0:0: [sda] No Caching mode page present
[  152.307165] sd 0:0:0:0: [sda] Assuming drive cache: write through
[  152.307182] sd 0:0:0:0: [sda] Attached SCSI disk
[  152.625645] usb 1-1.2.2: USB disconnect, device number 5
[  152.634294] scsi 0:0:0:0: rejecting I/O to offline device
[  152.634331] scsi 0:0:0:0: [sda] killing request
[  152.634406] scsi 0:0:0:0: [sda] Unhandled error code
[  152.634423] scsi 0:0:0:0: [sda]
[  152.634434] Result: hostbyte=0x01 driverbyte=0x00
[  152.634446] scsi 0:0:0:0: [sda] CDB:
[  152.634455] cdb[0]=0x28: 28 00 00 00 10 00 00 00 08 00
[  152.634492] end_request: I/O error, dev sda, sector 4096
[  152.634508] Buffer I/O error on device sda, logical block 512
[  152.634633] Buffer I/O error on device sda, logical block 512
[  152.884469] usb 1-1.2.2: new high-speed USB device number 6 using dwc_otg
[  154.515853] usb 1-1.2.2: New USB device found, idVendor=125f, idProduct=a93a
[  154.515910] usb 1-1.2.2: New USB device strings: Mfr=1, Product=3, SerialNumber=2
[  154.515927] usb 1-1.2.2: Product: Portable HDD SH93
[  154.515940] usb 1-1.2.2: Manufacturer: ADATA
[  154.515953] usb 1-1.2.2: SerialNumber: SH0560923011
[  154.520082] scsi1 : usb-storage 1-1.2.2:1.0
[  155.515431] scsi 1:0:0:0: Direct-Access     ADATA    HDD SH93              PQ: 0 ANSI: 0
[  155.519716] sd 1:0:0:0: [sda] 976773168 512-byte logical blocks: (500 GB/465 GiB)
[  155.520494] sd 1:0:0:0: [sda] Write Protect is off
[  155.520527] sd 1:0:0:0: [sda] Mode Sense: 03 00 00 00
[  155.521226] sd 1:0:0:0: [sda] No Caching mode page present
[  155.521254] sd 1:0:0:0: [sda] Assuming drive cache: write through
[  155.524035] sd 1:0:0:0: [sda] No Caching mode page present
[  155.524068] sd 1:0:0:0: [sda] Assuming drive cache: write through
[  155.537427]  sda: sda1
[  155.541577] sd 1:0:0:0: [sda] No Caching mode page present
[  155.541610] sd 1:0:0:0: [sda] Assuming drive cache: write through
[  155.541627] sd 1:0:0:0: [sda] Attached SCSI disk
[  178.471315] sd 1:0:0:0: [sda]
[  178.471345] Result: hostbyte=0x00 driverbyte=0x08
[  178.471359] sd 1:0:0:0: [sda]
[  178.471370] Sense Key : 0x5 [current]
[  178.471388] sd 1:0:0:0: [sda]
[  178.471397] ASC=0x20 ASCQ=0x0
[  178.471409] sd 1:0:0:0: [sda] CDB:
[  178.471418] cdb[0]=0x28: 28 00 3a 38 5f 80 00 00 08 00
[  178.471451] end_request: critical target error, dev sda, sector 976772992
[  178.471469] Buffer I/O error on device sda, logical block 122096624