sd Attached scsi generic sg1 type sd sdb 492288 2048-byte logical bloc

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sd 8:0:0:0: Attached scsi generic sg1 type 0
sd 8:0:0:0: [sdb] 492288 2048-byte logical blocks: (1.00 GB/961 MiB)
sd 8:0:0:0: [sdb] Write Protect is off
sd 8:0:0:0: [sdb] Mode Sense: 3e 00 00 00
sd 8:0:0:0: [sdb] Assuming drive cache: write through
sd 8:0:0:0: [sdb] 492288 2048-byte logical blocks: (1.00 GB/961 MiB)
sd 8:0:0:0: [sdb] Assuming drive cache: write through
sdb: sdb1
sd 8:0:0:0: [sdb] 492288 2048-byte logical blocks: (1.00 GB/961 MiB)
sd 8:0:0:0: [sdb] Assuming drive cache: write through
sd 8:0:0:0: [sdb] Attached SCSI removable disk
INFO: task pdflush:16935 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
pdflush D ffff88002c9b4874 0 16935 2 0x00000000
ffff88003a86dd80 0000000000000046 2f0022003d005800 65006d006f006800
ffff88003a86dce0 00000000000105c0 000000000000c8e8 0000000000000000
ffff88003bbe29c0 ffffffff816e1b00 ffff88003bbe2c48 00000001015e527c
Call Trace:
[<ffffffff8103b2aa>] ? 0xffffffff8103b2aa
[<ffffffff81033e98>] ? 0xffffffff81033e98
[<ffffffff8158bec1>] ? 0xffffffff8158bec1
[<ffffffff8109b630>] ? 0xffffffff8109b630
[<ffffffff8158b9ed>] 0xffffffff8158b9ed
[<ffffffff8158afe9>] 0xffffffff8158afe9
[<ffffffff810c574e>] 0xffffffff810c574e
[<ffffffff8109a6a5>] 0xffffffff8109a6a5
[<ffffffff8109b630>] ? 0xffffffff8109b630
[<ffffffff8109b781>] 0xffffffff8109b781
[<ffffffff8109a670>] ? 0xffffffff8109a670
[<ffffffff81056936>] 0xffffffff81056936
[<ffffffff8100ce2a>] 0xffffffff8100ce2a
[<ffffffff81056890>] ? 0xffffffff81056890
[<ffffffff8100ce20>] ? 0xffffffff8100ce20
usb 2-6: reset full speed USB device using ohci_hcd and address 10
usb 2-6: reset full speed USB device using ohci_hcd and address 10
usb 2-6: reset full speed USB device using ohci_hcd and address 10
usb 2-6: device descriptor read/64, error -62
usb 2-6: device descriptor read/64, error -62
usb 2-6: reset full speed USB device using ohci_hcd and address 10
usb 2-6: device descriptor read/64, error -62
usb 2-6: device descriptor read/64, error -62
usb 2-6: reset full speed USB device using ohci_hcd and address 10
usb 2-6: device not accepting address 10, error -62
usb 2-6: reset full speed USB device using ohci_hcd and address 10
usb 2-6: device not accepting address 10, error -62
sd 8:0:0:0: Device offlined - not ready after error recovery
usb 2-6: USB disconnect, address 10
usb 2-6: new full speed USB device using ohci_hcd and address 11
usb 2-6: device descriptor read/64, error -62
usb 2-6: device descriptor read/64, error -62
usb 2-6: new full speed USB device using ohci_hcd and address 12
usb 2-6: device descriptor read/64, error -62
usb 2-6: device descriptor read/64, error -62
usb 2-6: new full speed USB device using ohci_hcd and address 13
usb 2-6: device not accepting address 13, error -62
usb 2-6: new full speed USB device using ohci_hcd and address 14
usb 2-6: device not accepting address 14, error -62
hub 2-0:1.0: unable to enumerate USB device on port 6