root@ATK-IMX6U:~# [ 21.422816] usb 2-1.2: new low-speed USB device number 5 using ci_hdrc
[ 21.574224] input: USB GAMING MOUSE as /devices/platform/soc/2100000.aips-bus/2184200.usb/ci_hdrc.1/usb2/2-1/2-1.2/2-1.2:1.0/0003:18F8:1286.0001/input/input1
[ 21.628258] hid-generic 0003:18F8:1286.0001: input: USB HID v1.10 Mouse [USB GAMING MOUSE ] on usb-ci_hdrc.1-1.2/input0
[ 21.672848] input: USB GAMING MOUSE as /devices/platform/soc/2100000.aips-bus/2184200.usb/ci_hdrc.1/usb2/2-1/2-1.2/2-1.2:1.1/0003:18F8:1286.0002/input/input2
[ 21.763265] hid-generic 0003:18F8:1286.0002: input: USB HID v1.10 Keyboard [USB GAMING MOUSE ] on usb-ci_hdrc.1-1.2/input1
[ 22.893102] random: nonblocking pool is initialized
[ 27.342159] usb 2-1.2: USB disconnect, device number 5
[ 30.672803] usb 2-1.3: new low-speed USB device number 6 using ci_hdrc
[ 30.820697] input: USB GAMING MOUSE as /devices/platform/soc/2100000.aips-bus/2184200.usb/ci_hdrc.1/usb2/2-1/2-1.3/2-1.3:1.0/0003:18F8:1286.0003/input/input3
[ 30.854746] hid-generic 0003:18F8:1286.0003: input: USB HID v1.10 Mouse [USB GAMING MOUSE ] on usb-ci_hdrc.1-1.3/input0
[ 30.894812] input: USB GAMING MOUSE as /devices/platform/soc/2100000.aips-bus/2184200.usb/ci_hdrc.1/usb2/2-1/2-1.3/2-1.3:1.1/0003:18F8:1286.0004/input/input4
[ 30.963261] hid-generic 0003:18F8:1286.0004: input: USB HID v1.10 Keyboard [USB GAMING MOUSE ] on usb-ci_hdrc.1-1.3/input1
[ 33.147389] usb 2-1.3: USB disconnect, device number 6
[ 36.002783] usb 2-1.4: new low-speed USB device number 7 using ci_hdrc
[ 36.181023] input: USB GAMING MOUSE as /devices/platform/soc/2100000.aips-bus/2184200.usb/ci_hdrc.1/usb2/2-1/2-1.4/2-1.4:1.0/0003:18F8:1286.0005/input/input5
[ 36.214229] hid-generic 0003:18F8:1286.0005: input: USB HID v1.10 Mouse [USB GAMING MOUSE ] on usb-ci_hdrc.1-1.4/input0
[ 36.250623] input: USB GAMING MOUSE as /devices/platform/soc/2100000.aips-bus/2184200.usb/ci_hdrc.1/usb2/2-1/2-1.4/2-1.4:1.1/0003:18F8:1286.0006/input/input6
[ 36.323184] hid-generic 0003:18F8:1286.0006: input: USB HID v1.10 Keyboard [USB GAMING MOUSE ] on usb-ci_hdrc.1-1.4/input1
[ 38.475862] usb 2-1.4: USB disconnect, device number 7
[ 44.792755] usb 2-1.2: new full-speed USB device number 8 using ci_hdrc
[ 44.916194] usb 2-1.2: not running at top speed; connect to a high speed hub
[ 44.944239] usb-storage 2-1.2:1.0: USB Mass Storage device detected
[ 44.963219] scsi host0: usb-storage 2-1.2:1.0
[ 46.029922] usb 2-1: USB disconnect, device number 4
[ 46.036205] usb 2-1.2: USB disconnect, device number 8
[ 46.342787] usb 2-1: new high-speed USB device number 9 using ci_hdrc
[ 46.602783] usb 2-1: new high-speed USB device number 10 using ci_hdrc
[ 48.402777] usb 2-1: new full-speed USB device number 12 using ci_hdrc
[ 48.555464] usb 2-1: not running at top speed; connect to a high speed hub
[ 48.574240] hub 2-1:1.0: USB hub found
[ 48.583375] hub 2-1:1.0: 4 ports detected
[ 48.892810] usb 2-1.2: new full-speed USB device number 13 using ci_hdrc
[ 49.026421] usb 2-1.2: not running at top speed; connect to a high speed hub
[ 49.061866] usb-storage 2-1.2:1.0: USB Mass Storage device detected
[ 49.083822] scsi host1: usb-storage 2-1.2:1.0
[ 50.087526] scsi 1:0:0:0: Direct-Access USB DISK 2.0 PMAP PQ: 0 ANSI: 4
[ 50.112517] sd 1:0:0:0: [sda] 1966080 512-byte logical blocks: (1.00 GB/960 MiB)
[ 50.125726] sd 1:0:0:0: [sda] Write Protect is off
[ 50.135518] sd 1:0:0:0: [sda] No Caching mode page found
[ 50.148581] sd 1:0:0:0: [sda] Assuming drive cache: write through
[ 50.186558] sda: sda1
[ 50.211289] sd 1:0:0:0: [sda] Attached SCSI removable disk
[ 50.476507] usb 2-1: USB disconnect, device number 12
[ 50.481624] usb 2-1.2: USB disconnect, device number 13
[ 50.495579] scsi 1:0:0:0: rejecting I/O to offline device
[ 50.501018] scsi 1:0:0:0: [sda] killing request
[ 50.505582] scsi 1:0:0:0: rejecting I/O to offline device
[ 50.510996] scsi 1:0:0:0: [sda] killing request
[ 50.515710] scsi 1:0:0:0: [sda] FAILED Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[ 50.524124] scsi 1:0:0:0: [sda] CDB: Read(10) 28 00 00 00 00 80 00 00 f0 00
[ 50.531098] blk_update_request: I/O error, dev sda, sector 128
[ 50.537064] scsi 1:0:0:0: [sda] FAILED Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[ 50.545465] scsi 1:0:0:0: [sda] CDB: Read(10) 28 00 00 00 01 70 00 00 90 00
[ 50.552438] blk_update_request: I/O error, dev sda, sector 368
[ 50.559240] Buffer I/O error on dev sda, logical block 16, async page read
[ 50.584981] Buffer I/O error on dev sda, logical block 2, async page read
[ 50.688369] udevd[736]: inotify_add_watch(6, /dev/sda, 10) failed: No such file or directory
[ 50.952778] usb 2-1: new high-speed USB device number 14 using ci_hdrc
[ 51.202786] usb 2-1: new high-speed USB device number 15 using ci_hdrc
[ 51.452768] usb 2-1: new high-speed USB device number 16 using ci_hdrc
[ 51.882776] usb 2-1: device not accepting address 16, error -71
[ 52.002783] usb 2-1: new high-speed USB device number 17 using ci_hdrc
[ 52.432786] usb 2-1: device not accepting address 17, error -71
[ 52.441202] usb usb2-port1: unable to enumerate USB device
[ 52.533907] udevd[757]: inotify_add_watch(6, /dev/sda1, 10) failed: No such file or directory