[ 2833.320016] usb 2-1: new SuperSpeed USB device number 3 using xhci_hcd
[ 2833.341529] usb 2-1: New USB device found, idVendor=0951, idProduct=1666
[ 2833.341535] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2833.341539] usb 2-1: Product: DataTraveler 3.0
[ 2833.341543] usb 2-1: Manufacturer: Kingston
[ 2833.341547] usb 2-1: SerialNumber: 60A44C3FB03BE271B98D2E03
[ 2833.342503] usb-storage 2-1:1.0: USB Mass Storage device detected
[ 2833.342691] scsi host6: usb-storage 2-1:1.0
[ 2834.344947] scsi 6:0:0:0: Direct-Access     Kingston DataTraveler 3.0 PMAP PQ: 0 ANSI: 6
[ 2834.345581] sd 6:0:0:0: Attached scsi generic sg1 type 0
[ 2834.345770] sd 6:0:0:0: [sdb] 242221056 512-byte logical blocks: (124 GB/116 GiB)
[ 2834.346076] sd 6:0:0:0: [sdb] Write Protect is off
[ 2834.346081] sd 6:0:0:0: [sdb] Mode Sense: 45 00 00 00
[ 2834.346410] sd 6:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 2837.518967]  sdb: sdb1
[ 2837.520672] sd 6:0:0:0: [sdb] Attached SCSI removable disk
[ 2837.770601] FAT-fs (sdb1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[ 3036.672664] usb 2-2: new SuperSpeed USB device number 4 using xhci_hcd
[ 3036.815230] usb 2-2: New USB device found, idVendor=0951, idProduct=1666
[ 3036.815236] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 3036.815240] usb 2-2: Product: DataTraveler 3.0
[ 3036.815244] usb 2-2: Manufacturer: Kingston
[ 3036.815248] usb 2-2: SerialNumber: 60A44C413BF2E1A17628E06C
[ 3036.816726] usb-storage 2-2:1.0: USB Mass Storage device detected
[ 3036.817078] scsi host7: usb-storage 2-2:1.0
[ 3039.926260] scsi 7:0:0:0: Direct-Access     Kingston DataTraveler 3.0 PMAP PQ: 0 ANSI: 6
[ 3039.926958] sd 7:0:0:0: Attached scsi generic sg2 type 0
[ 3039.928096] sd 7:0:0:0: [sdc] 121132032 512-byte logical blocks: (62.0 GB/57.8 GiB)
[ 3039.928677] sd 7:0:0:0: [sdc] Write Protect is off
[ 3039.928683] sd 7:0:0:0: [sdc] Mode Sense: 23 00 00 00
[ 3039.929318] sd 7:0:0:0: [sdc] No Caching mode page found
[ 3039.929328] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[ 3039.948976]  sdc: sdc1
[ 3039.951431] sd 7:0:0:0: [sdc] Attached SCSI removable disk
[ 3041.622653] EXT4-fs (sdc1): mounted filesystem with ordered data mode. Opts: (null)
[ 3125.529840] sd 7:0:0:0: [sdc] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3125.529847] sd 7:0:0:0: [sdc] tag#0 Sense Key : Medium Error [current] 
[ 3125.529853] sd 7:0:0:0: [sdc] tag#0 Add. Sense: Unrecovered read error
[ 3125.529859] sd 7:0:0:0: [sdc] tag#0 CDB: Read(10) 28 00 00 64 08 00 00 00 08 00
[ 3125.529864] print_req_error: critical medium error, dev sdc, sector 6555648
[ 3263.465265] INFO: task kworker/u16:1:80 blocked for more than 120 seconds.
[ 3263.465273]       Not tainted 4.15.0-39-generic #42-Ubuntu
[ 3263.465277] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 3263.465282] kworker/u16:1   D    0    80      2 0x80000000
[ 3263.465298] Workqueue: events_freezable_power_ disk_events_workfn
[ 3263.465301] Call Trace:
[ 3263.465312]  __schedule+0x291/0x8a0
[ 3263.465318]  schedule+0x2c/0x80
[ 3263.465324]  io_schedule+0x16/0x40
[ 3263.465329]  get_request+0x2a4/0x800
[ 3263.465337]  ? wait_woken+0x80/0x80
[ 3263.465342]  blk_get_request_flags+0xfa/0x1a0
[ 3263.465347]  scsi_execute+0x40/0x250
[ 3263.465351]  scsi_test_unit_ready+0x60/0xe0
[ 3263.465358]  sd_check_events+0xf8/0x1b0
[ 3263.465364]  disk_check_events+0x65/0x150
[ 3263.465370]  disk_events_workfn+0x16/0x20
[ 3263.465376]  process_one_work+0x1de/0x410
[ 3263.465381]  worker_thread+0x32/0x410
[ 3263.465388]  kthread+0x121/0x140
[ 3263.465393]  ? process_one_work+0x410/0x410
[ 3263.465399]  ? kthread_create_worker_on_cpu+0x70/0x70
[ 3263.465406]  ret_from_fork+0x35/0x40
[ 3263.465492] INFO: task kworker/u16:2:7632 blocked for more than 120 seconds.
[ 3263.465496]       Not tainted 4.15.0-39-generic #42-Ubuntu
[ 3263.465500] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 3263.465504] kworker/u16:2   D    0  7632      2 0x80000000
[ 3263.465514] Workqueue: writeback wb_workfn (flush-8:32)
[ 3263.465518] Call Trace:
[ 3263.465523]  __schedule+0x291/0x8a0
[ 3263.465529]  schedule+0x2c/0x80
[ 3263.465533]  io_schedule+0x16/0x40
[ 3263.465537]  get_request+0x2a4/0x800
[ 3263.465544]  ? wait_woken+0x80/0x80
[ 3263.465549]  blk_queue_bio+0x128/0x450
[ 3263.465554]  generic_make_request+0x124/0x300
[ 3263.465559]  submit_bio+0x73/0x140
[ 3263.465565]  ? bio_alloc_bioset+0xcc/0x1e0
[ 3263.465569]  ? submit_bio+0x73/0x140
[ 3263.465573]  ? guard_bio_eod+0x2c/0xf0
[ 3263.465577]  submit_bh_wbc+0x180/0x1b0
[ 3263.465582]  __block_write_full_page+0x213/0x3f0
[ 3263.465586]  ? I_BDEV+0x20/0x20
[ 3263.465591]  block_write_full_page+0xd3/0x120
[ 3263.465595]  blkdev_writepage+0x18/0x20
[ 3263.465602]  __writepage+0x1d/0x50
[ 3263.465607]  write_cache_pages+0x20c/0x4e0
[ 3263.465613]  ? __wb_calc_thresh+0x130/0x130
[ 3263.465620]  generic_writepages+0x5c/0x90
[ 3263.465625]  ? load_balance+0x164/0x9c0
[ 3263.465629]  blkdev_writepages+0x2f/0x40
[ 3263.465633]  ? blkdev_writepages+0x2f/0x40
[ 3263.465639]  do_writepages+0x4b/0xe0
[ 3263.465645]  ? __switch_to_asm+0x34/0x70
[ 3263.465650]  ? fprop_fraction_percpu+0x2f/0x80
[ 3263.465655]  ? __wb_calc_thresh+0x3e/0x130
[ 3263.465660]  __writeback_single_inode+0x45/0x340
[ 3263.465665]  ? __writeback_single_inode+0x45/0x340
[ 3263.465670]  writeback_sb_inodes+0x1e1/0x510
[ 3263.465676]  __writeback_inodes_wb+0x67/0xb0
[ 3263.465681]  wb_writeback+0x271/0x300
[ 3263.465686]  wb_workfn+0x1bb/0x400
[ 3263.465690]  ? wb_workfn+0x1bb/0x400
[ 3263.465696]  process_one_work+0x1de/0x410
[ 3263.465701]  worker_thread+0x32/0x410
[ 3263.465708]  kthread+0x121/0x140
[ 3263.465712]  ? process_one_work+0x410/0x410
[ 3263.465718]  ? kthread_create_worker_on_cpu+0x70/0x70
[ 3263.465724]  ? do_syscall_64+0x73/0x130
[ 3263.465729]  ? SyS_exit+0x17/0x20
[ 3263.465735]  ret_from_fork+0x35/0x40