Unable to access USB drive, an operation already pending

[Marco Fioretti]

Thanks Ian! Dmesg is another tool I know, but in the confusion of these weeks I had temporarily forgotten.
the relevant output is pasted at the bottom, below your reply. I have done a bit of searching, and those messages appeared even with drives that were recoverable, even if with reduced capacity, but there seems to be no unique way to figure out if this is the case here. What do you recommend? Thanks again!
Marco
On Mon, Apr 27, 2020 at 20:29, Ian Bruntlett  wrote:Hi Marco,
On Mon, 27 Apr 2020 at 19:09, Marco Fioretti  wrote:
Is there any hope it is not physically broken, and how to know it for sure, and then find/ fix the problem?You could show people the most recent entries in the kernel's ring buffer.
So... you could:-
* Connect the drive as normal
* Type in the command dmesg and reply with the results (to the list rather than me).
 [ 6248.766038] usb 3-1: new high-speed USB device number 2 using xhci_hcd
[ 6248.915984] usb 3-1: New USB device found, idVendor=0480, idProduct=a200, bcdDevice= 0.00
[ 6248.915989] usb 3-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 6248.915992] usb 3-1: Product: External USB 3.0
[ 6248.915994] usb 3-1: Manufacturer: TOSHIBA
[ 6248.915996] usb 3-1: SerialNumber: 20151219024021F
[ 6248.947504] usb-storage 3-1:1.0: USB Mass Storage device detected
[ 6248.948029] scsi host6: usb-storage 3-1:1.0
[ 6248.948246] usbcore: registered new interface driver usb-storage
[ 6248.950368] usbcore: registered new interface driver uas
[ 6249.959018] scsi 6:0:0:0: Direct-Access     TOSHIBA  External USB 3.0 0    PQ: 0 ANSI: 6
[ 6249.959975] sd 6:0:0:0: Attached scsi generic sg3 type 0
[ 6254.347424] sd 6:0:0:0: [sdc] 3907029168 512-byte logical blocks: (2.00 TB/1.82 TiB)
[ 6254.347856] sd 6:0:0:0: [sdc] Write Protect is off
[ 6254.347873] sd 6:0:0:0: [sdc] Mode Sense: 43 00 00 00
[ 6254.348273] sd 6:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 6254.354109]  sdc: sdc1
[ 6254.356199] sd 6:0:0:0: [sdc] Attached SCSI disk
[ 6260.072630] sd 6:0:0:0: [sdc] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 6260.072636] sd 6:0:0:0: [sdc] tag#0 Sense Key : Medium Error [current] 
[ 6260.072640] sd 6:0:0:0: [sdc] tag#0 Add. Sense: Unrecovered read error
[ 6260.072645] sd 6:0:0:0: [sdc] tag#0 CDB: Read(10) 28 00 00 02 90 18 00 00 f0 00
[ 6260.072650] blk_update_request: critical medium error, dev sdc, sector 167960 op 0x0:(READ) flags 0x84700 phys_seg 2 pr
io class 0
[ 6263.428276] sd 6:0:0:0: [sdc] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 6263.428282] sd 6:0:0:0: [sdc] tag#0 Sense Key : Medium Error [current] 
[ 6263.428285] sd 6:0:0:0: [sdc] tag#0 Add. Sense: Unrecovered read error
[ 6263.428290] sd 6:0:0:0: [sdc] tag#0 CDB: Read(10) 28 00 00 02 90 f8 00 00 01 00
[ 6263.428295] blk_update_request: critical medium error, dev sdc, sector 168184 op 0x0:(READ) flags 0x0 phys_seg 1 prio c
lass 0
[ 6263.428304] Buffer I/O error on dev sdc1, logical block 166136, async page read
[ 6266.761868] sd 6:0:0:0: [sdc] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 6266.761875] sd 6:0:0:0: [sdc] tag#0 Sense Key : Medium Error [current] 
[ 6266.761879] sd 6:0:0:0: [sdc] tag#0 Add. Sense: Unrecovered read error
[ 6266.761884] sd 6:0:0:0: [sdc] tag#0 CDB: Read(10) 28 00 00 02 90 f9 00 00 07 00
[ 6266.761890] blk_update_request: critical medium error, dev sdc, sector 168185 op 0x0:(READ) flags 0x0 phys_seg 7 prio c
lass 0
[ 6266.761898] Buffer I/O error on dev sdc1, logical block 166137, async page read
[ 6266.761904] Buffer I/O error on dev sdc1, logical block 166138, async page read
[ 6266.761907] Buffer I/O error on dev sdc1, logical block 166139, async page read
[ 6266.761909] Buffer I/O error on dev sdc1, logical block 166140, async page read
[ 6266.761912] Buffer I/O error on dev sdc1, logical block 166141, async page read
[ 6266.761914] Buffer I/O error on dev sdc1, logical block 166142, async page read
[ 6266.761917] Buffer I/O error on dev sdc1, logical block 166143, async page read
[ 6270.095163] sd 6:0:0:0: [sdc] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 6270.095168] sd 6:0:0:0: [sdc] tag#0 Sense Key : Medium Error [current] 
[ 6270.095172] sd 6:0:0:0: [sdc] tag#0 Add. Sense: Unrecovered read error
[ 6270.095177] sd 6:0:0:0: [sdc] tag#0 CDB: Read(10) 28 00 00 02 90 f8 00 00 01 00
[ 6270.095181] blk_update_request: critical medium error, dev sdc, sector 168184 op 0x0:(READ) flags 0x0 phys_seg 1 prio c
lass 0
[ 6270.095189] Buffer I/O error on dev sdc1, logical block 166136, async page read
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/ubuntu-users/attachments/20200503/7c4f1031/attachment.html>