dmesg | tail -20 vypíše:
[10040.160120] usb 2-2: reset high speed USB device using ehci_hcd and address 4
[10040.311172] sd 5:0:0:0: [sdb] Unhandled error code
[10040.311180] sd 5:0:0:0: [sdb] Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK
[10040.311190] sd 5:0:0:0: [sdb] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
[10040.311212] end_request: I/O error, dev sdb, sector 0
[10040.311223] Buffer I/O error on device sdb, logical block 0
[10071.160072] usb 2-2: reset high speed USB device using ehci_hcd and address 4
[10102.160102] usb 2-2: reset high speed USB device using ehci_hcd and address 4
[10133.160102] usb 2-2: reset high speed USB device using ehci_hcd and address 4
[10145.246835] usb 1-1: USB disconnect, address 5
[10164.160078] usb 2-2: reset high speed USB device using ehci_hcd and address 4
[10195.160113] usb 2-2: reset high speed USB device using ehci_hcd and address 4
[10226.160925] usb 2-2: reset high speed USB device using ehci_hcd and address 4
[10226.312315] sd 5:0:0:0: [sdb] Unhandled error code
[10226.312323] sd 5:0:0:0: [sdb] Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK
[10226.312332] sd 5:0:0:0: [sdb] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
[10226.312354] end_request: I/O error, dev sdb, sector 0
[10226.312364] Buffer I/O error on device sdb, logical block 0
[10226.312406] Dev sdb: unable to read RDB block 0
[10257.160120] usb 2-2: reset high speed USB device using ehci_hcd and address 4
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Ještě poznámka pod čarou; nevím jestli je to podstatné. Příkaz dmesg jsem zadal do jiného okna terminálu, to první s dd ... se nedá použít.