我的 USB 闪存驱动器在一台自助照片打印机上使用后就无法使用了。当我滚动浏览闪存驱动器上的照片并想更改文件的查看顺序时，该机器上的软件崩溃了。崩溃后，我无法从闪存驱动器读取任何内容。
将驱动器插入我的Ubuntu 18.04.3 LTS并查看/var/log/syslog，我看到以下（相关）错误消息：
kernel: [2661765.200803] usb-storage 4-1:1.0: USB Mass Storage device detected
kernel: [2661765.201724] scsi host6: usb-storage 4-1:1.0
mtp-probe: checking bus 4, device 9: "/sys/devices/pci0000:00/0000:00:14.0/usb4/4-1"
mtp-probe: bus: 4, device: 9 was not an MTP device
upowerd[2591]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb4/4-1/4-1:1.0
upowerd[2591]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb4/4-1
org.xfce.FileManager[2344]: thunar-volman: Unsupported USB device type "usb".
org.xfce.FileManager[2344]: thunar-volman: Unsupported USB device type "usb-storage".
kernel: [2661766.632180] scsi 6:0:0:0: Direct-Access JetFlash Transcend 64GB 1100 PQ: 0 ANSI: 6
kernel: [2661766.632813] sd 6:0:0:0: Attached scsi generic sg2 type 0
kernel: [2661766.634459] sd 6:0:0:0: [sdb] 123404288 512-byte logical blocks: (63.2 GB/58.8 GiB)
kernel: [2661766.635203] sd 6:0:0:0: [sdb] Write Protect is off
kernel: [2661766.635205] sd 6:0:0:0: [sdb] Mode Sense: 43 00 00 00
kernel: [2661766.636058] sd 6:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
kernel: [2661766.640941] scsi_io_completion: 4 callbacks suppressed
kernel: [2661766.640944] sd 6:0:0:0: [sdb] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
kernel: [2661766.640947] sd 6:0:0:0: [sdb] tag#0 Sense Key : Not Ready [current]
kernel: [2661766.640949] sd 6:0:0:0: [sdb] tag#0 Add. Sense: Medium not present
kernel: [2661766.640952] sd 6:0:0:0: [sdb] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 08 00
kernel: [2661766.640953] print_req_error: 4 callbacks suppressed
闪存驱动器似乎被识别，尽管大小错误，但它有 128 GB。
然而，在收到这些消息之后，Buffer I/O出现了错误：
kernel: [2661766.640954] print_req_error: I/O error, dev sdb, sector 0
kernel: [2661766.640957] buffer_io_error: 3 callbacks suppressed
kernel: [2661766.640958] Buffer I/O error on dev sdb, logical block 0, async page read
kernel: [2661766.641870] sd 6:0:0:0: [sdb] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
kernel: [2661766.641873] sd 6:0:0:0: [sdb] tag#0 Sense Key : Not Ready [current]
kernel: [2661766.641875] sd 6:0:0:0: [sdb] tag#0 Add. Sense: Medium not present
kernel: [2661766.641877] sd 6:0:0:0: [sdb] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 08 00
以下部分重复了8次：
kernel: [2661766.641878] print_req_error: I/O error, dev sdb, sector 0
kernel: [2661766.641881] Buffer I/O error on dev sdb, logical block 0, async page read
kernel: [2661766.642774] sd 6:0:0:0: [sdb] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
kernel: [2661766.642776] sd 6:0:0:0: [sdb] tag#0 Sense Key : Not Ready [current]
kernel: [2661766.642777] sd 6:0:0:0: [sdb] tag#0 Add. Sense: Medium not present
kernel: [2661766.642778] sd 6:0:0:0: [sdb] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 08 00
最后部分如下：
kernel: [2661766.649002] print_req_error: I/O error, dev sdb, sector 24
kernel: [2661766.649004] Buffer I/O error on dev sdb, logical block 3, async page read
kernel: [2661766.650832] sdb: unable to read partition table
kernel: [2661766.653438] sd 6:0:0:0: [sdb] Attached SCSI removable disk
org.xfce.FileManager[2344]: thunar-volman: Unknown block device type "disk".
colord-sane: io/hpmud/pp.c 627: unable to read device-id ret=-1
我担心这个unable to read partition table部分，但这可能与有关Buffer I/O。
我不知道如何恢复我的闪存驱动器，因为# smartctl -a /dev/sdb结果只有
/dev/sdb: Unknown USB bridge [0x8564:0x1000 (0x1100)]
Please specify device type with the -d option.
手动设置类型将# smartctl -d scsi -a /dev/sdb产生以下输出（删除本地时间和序列号，因为它们不重要）
=== START OF INFORMATION SECTION ===
Vendor: JetFlash
Product: Transcend 64GB
Revision: 1100
Compliance: SPC-4
User Capacity: 63.182.995.456 bytes [63,1 GB]
Logical block size: 512 bytes
LU is fully provisioned
scsiModePageOffset: response length too short, resp_len=4 offset=4 bd_len=0
Logical Unit id: 0x00010200000608040x2020030102060804error: SCSI name string
Device type: disk
scsiModePageOffset: response length too short, resp_len=4 offset=4 bd_len=0
SMART support is: Available - device has SMART capability.
SMART support is: Disabled
Temperature Warning: Disabled or Not Supported
=== START OF READ SMART DATA SECTION ===
SMART Health Status: OK
Current Drive Temperature: 0 C
Drive Trip Temperature: 0 C
Error Counter logging not supported
scsiModePageOffset: response length too short, resp_len=4 offset=4 bd_len=0
Device does not support Self Test logging
再次，尺寸错误。
非常感谢任何有关如何尝试访问我的闪存驱动器的建议！