Immediate I/O errors when dd-ing data to an external USB3 disk

[Lenz Grimmer]

I discovered this bug while trying to dd a potentially corrupt Btrfs file system to an external hard disk (see #1415510 for details). Unfortunately "ubuntu-bug" refused to file this report, as I'm running the mainline kernel (as requested in the other bug report).

I'm running Linux 3.19.0-031900rc6-generic (x86_64) in Ubuntu Trusty on an IBM Thinkpad T440. I am using an external 4TB Samsung USB3 hard disk drive for backup purposes.

% cat /proc/version
Linux version 3.19.0-031900rc6-generic (kernel@gomeisa) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #201501261152 SMP Mon Jan 26 16:53:27 UTC 2015

When trying to dd the content of a logical volume into an image file on the external disk drive (/dev/sdc1, formatted using ext4), the kernel immediately begins to throw I/O Errors:

% sudo dd bs=8k if=/dev/mapper/ubuntu--vg-container of=/media/lenz/e2a4dc71-4c96-4dab-982c-29918e556afd/vg-container.img

Jan 29 12:18:10 lenz-ThinkPad-T440 kernel: [ 520.321122] usb 2-1: new SuperSpeed USB device number 5 using xhci_hcd
Jan 29 12:18:10 lenz-ThinkPad-T440 kernel: [ 520.337777] usb 2-1: New USB device found, idVendor=04e8, idProduct=6125
Jan 29 12:18:10 lenz-ThinkPad-T440 kernel: [ 520.337781] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Jan 29 12:18:10 lenz-ThinkPad-T440 kernel: [ 520.337783] usb 2-1: Product: D3 Station
Jan 29 12:18:10 lenz-ThinkPad-T440 kernel: [ 520.337785] usb 2-1: Manufacturer: Samsung
Jan 29 12:18:10 lenz-ThinkPad-T440 kernel: [ 520.337786] usb 2-1: SerialNumber: 00000000011E0A49
Jan 29 12:18:10 lenz-ThinkPad-T440 kernel: [ 520.352472] usb-storage 2-1:1.0: USB Mass Storage device detected
Jan 29 12:18:10 lenz-ThinkPad-T440 kernel: [ 520.352561] scsi host3: usb-storage 2-1:1.0
Jan 29 12:18:10 lenz-ThinkPad-T440 kernel: [ 520.352644] usbcore: registered new interface driver usb-storage
Jan 29 12:18:10 lenz-ThinkPad-T440 kernel: [ 520.354202] usbcore: registered new interface driver uas
Jan 29 12:18:11 lenz-ThinkPad-T440 kernel: [ 521.349445] scsi 3:0:0:0: Direct-Access Samsung D3 Station 0202 PQ: 0 ANSI: 6
Jan 29 12:18:11 lenz-ThinkPad-T440 kernel: [ 521.349740] sd 3:0:0:0: Attached scsi generic sg2 type 0
Jan 29 12:18:11 lenz-ThinkPad-T440 kernel: [ 521.351547] sd 3:0:0:0: [sdc] Spinning up disk...
Jan 29 12:18:22 lenz-ThinkPad-T440 kernel: [ 526.766731] .......ready
Jan 29 12:18:22 lenz-ThinkPad-T440 kernel: [ 532.788913] sd 3:0:0:0: [sdc] 976754645 4096-byte logical blocks: (4.00 TB/3.63 TiB)
Jan 29 12:18:22 lenz-ThinkPad-T440 kernel: [ 532.789457] sd 3:0:0:0: [sdc] Write Protect is off
Jan 29 12:18:22 lenz-ThinkPad-T440 kernel: [ 532.789459] sd 3:0:0:0: [sdc] Mode Sense: 2b 00 10 08
Jan 29 12:18:22 lenz-ThinkPad-T440 kernel: [ 532.789992] sd 3:0:0:0: [sdc] Write cache: enabled, read cache: enabled, supports DPO and FUA
Jan 29 12:18:22 lenz-ThinkPad-T440 kernel: [ 532.790315] sd 3:0:0:0: [sdc] 976754645 4096-byte logical blocks: (4.00 TB/3.63 TiB)
Jan 29 12:18:22 lenz-ThinkPad-T440 kernel: [ 532.813839] sdc: sdc1
Jan 29 12:18:22 lenz-ThinkPad-T440 kernel: [ 532.814333] sd 3:0:0:0: [sdc] 976754645 4096-byte logical blocks: (4.00 TB/3.63 TiB)
Jan 29 12:18:22 lenz-ThinkPad-T440 kernel: [ 532.843305] sd 3:0:0:0: [sdc] Attached SCSI disk
Jan 29 12:18:23 lenz-ThinkPad-T440 kernel: [ 533.145443] EXT4-fs (sdc1): mounted filesystem with ordered data mode. Opts: (null)
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192217] sd 3:0:0:0: [sdc] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192222] sd 3:0:0:0: [sdc] CDB:
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192223] Write(10): 2a 00 01 a7 a4 00 00 3c 00 00
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192230] blk_update_request: I/O error, dev sdc, sector 222109696
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192236] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 33554432 size 8388608 starting block 27763968)
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192239] Buffer I/O error on device sdc1, logical block 27763456
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192242] Buffer I/O error on device sdc1, logical block 27763457
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192244] Buffer I/O error on device sdc1, logical block 27763458
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192245] Buffer I/O error on device sdc1, logical block 27763459
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192247] Buffer I/O error on device sdc1, logical block 27763460
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192248] Buffer I/O error on device sdc1, logical block 27763461
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192249] Buffer I/O error on device sdc1, logical block 27763462
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192251] Buffer I/O error on device sdc1, logical block 27763463
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192252] Buffer I/O error on device sdc1, logical block 27763464
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192254] Buffer I/O error on device sdc1, logical block 27763465
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192336] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 33554432 size 8388608 starting block 27764224)
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192412] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 33554432 size 8388608 starting block 27764480)
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192486] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 33554432 size 8388608 starting block 27764736)
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192561] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 33554432 size 8388608 starting block 27764992)
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192637] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 41943040 size 8388608 starting block 27765248)
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192717] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 41943040 size 8388608 starting block 27765504)
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192787] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 41943040 size 8388608 starting block 27765760)
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192856] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 41943040 size 8388608 starting block 27766016)
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.192928] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 41943040 size 8388608 starting block 27766272)
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.236033] sd 3:0:0:0: [sdc] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.236038] sd 3:0:0:0: [sdc] CDB:
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.236039] Write(10): 2a 00 01 a7 e0 00 00 21 00 00
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.236047] blk_update_request: I/O error, dev sdc, sector 222232576
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.759490] sd 3:0:0:0: [sdc] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.759522] sd 3:0:0:0: [sdc] CDB:
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.759527] Write(10): 2a 00 01 a8 9d 00 00 34 00 00
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.759538] blk_update_request: I/O error, dev sdc, sector 222619648
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.792110] sd 3:0:0:0: [sdc] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.792114] sd 3:0:0:0: [sdc] CDB:
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.792116] Write(10): 2a 00 01 a8 d1 00 00 34 00 00
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.792123] blk_update_request: I/O error, dev sdc, sector 222726144
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.827998] sd 3:0:0:0: [sdc] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.828003] sd 3:0:0:0: [sdc] CDB:
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.828004] Write(10): 2a 00 01 a9 05 00 00 3c 00 00
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.828011] blk_update_request: I/O error, dev sdc, sector 222832640
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.868047] sd 3:0:0:0: [sdc] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.868052] sd 3:0:0:0: [sdc] CDB:
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.868053] Write(10): 2a 00 01 a9 41 00 00 3c 00 00
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.868060] blk_update_request: I/O error, dev sdc, sector 222955520
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.904054] sd 3:0:0:0: [sdc] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.904058] sd 3:0:0:0: [sdc] CDB:
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.904059] Write(10): 2a 00 01 a9 7d 00 00 3c 00 00
Jan 29 12:18:58 lenz-ThinkPad-T440 kernel: [ 568.904066] blk_update_request: I/O error, dev sdc, sector 223078400
Jan 29 12:18:59 lenz-ThinkPad-T440 kernel: [ 568.948161] sd 3:0:0:0: [sdc] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Jan 29 12:18:59 lenz-ThinkPad-T440 kernel: [ 568.948165] sd 3:0:0:0: [sdc] CDB:
Jan 29 12:18:59 lenz-ThinkPad-T440 kernel: [ 568.948167] Write(10): 2a 00 01 a9 b9 00 00 3c 00 00
Jan 29 12:18:59 lenz-ThinkPad-T440 kernel: [ 568.948174] blk_update_request: I/O error, dev sdc, sector 223201280
Jan 29 12:18:59 lenz-ThinkPad-T440 kernel: [ 569.119910] sd 3:0:0:0: [sdc] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Jan 29 12:18:59 lenz-ThinkPad-T440 kernel: [ 569.119916] sd 3:0:0:0: [sdc] CDB:
Jan 29 12:18:59 lenz-ThinkPad-T440 kernel: [ 569.119919] Write(10): 2a 00 01 aa 09 00 00 3c 00 00
Jan 29 12:18:59 lenz-ThinkPad-T440 kernel: [ 569.119928] blk_update_request: I/O error, dev sdc, sector 223365120
Jan 29 12:18:59 lenz-ThinkPad-T440 kernel: [ 569.163964] sd 3:0:0:0: [sdc] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Jan 29 12:18:59 lenz-ThinkPad-T440 kernel: [ 569.163970] sd 3:0:0:0: [sdc] CDB:
Jan 29 12:18:59 lenz-ThinkPad-T440 kernel: [ 569.163973] Write(10): 2a 00 01 aa 45 00 00 3c 00 00
Jan 29 12:18:59 lenz-ThinkPad-T440 kernel: [ 569.163983] blk_update_request: I/O error, dev sdc, sector 223488000
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053115] sd 3:0:0:0: [sdc] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053121] sd 3:0:0:0: [sdc] CDB:
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053123] Write(10): 2a 00 01 aa a0 5c 00 34 00 00
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053132] blk_update_request: I/O error, dev sdc, sector 223675104
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053137] EXT4-fs warning: 547 callbacks suppressed
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053140] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 703971328 size 671744 starting block 27959552)
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053144] buffer_io_error: 142582 callbacks suppressed
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053146] Buffer I/O error on device sdc1, logical block 27959132
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053150] Buffer I/O error on device sdc1, logical block 27959133
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053152] Buffer I/O error on device sdc1, logical block 27959134
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053154] Buffer I/O error on device sdc1, logical block 27959135
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053157] Buffer I/O error on device sdc1, logical block 27959136
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053159] Buffer I/O error on device sdc1, logical block 27959137
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053162] Buffer I/O error on device sdc1, logical block 27959138
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053164] Buffer I/O error on device sdc1, logical block 27959139
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053167] Buffer I/O error on device sdc1, logical block 27959140
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053169] Buffer I/O error on device sdc1, logical block 27959141
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053250] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 704643072 size 8388608 starting block 27959808)
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053364] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 704643072 size 8388608 starting block 27960064)
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053477] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 704643072 size 8388608 starting block 27960320)
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053586] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 704643072 size 8388608 starting block 27960576)
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053696] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 704643072 size 8388608 starting block 27960832)
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053805] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 704643072 size 8388608 starting block 27961088)
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.053915] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 704643072 size 8388608 starting block 27961344)
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.054019] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 704643072 size 8388608 starting block 27961600)
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.054210] EXT4-fs warning (device sdc1): ext4_end_bio:317: I/O error -5 writing to inode 13 (offset 713031680 size 8388608 starting block 27961856)
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.097102] sd 3:0:0:0: [sdc] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.097106] sd 3:0:0:0: [sdc] CDB:
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.097108] Write(10): 2a 00 01 aa d4 5c 00 34 00 00
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.097115] blk_update_request: I/O error, dev sdc, sector 223781600
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.137353] sd 3:0:0:0: [sdc] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.137357] sd 3:0:0:0: [sdc] CDB:
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.137359] Write(10): 2a 00 01 ab 08 5c 00 3b a4 00
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.137366] blk_update_request: I/O error, dev sdc, sector 223888096
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.176987] sd 3:0:0:0: [sdc] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.176991] sd 3:0:0:0: [sdc] CDB:
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.176993] Write(10): 2a 00 01 ab 44 00 00 3c 00 00
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.177000] blk_update_request: I/O error, dev sdc, sector 224010240
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.216930] sd 3:0:0:0: [sdc] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.216935] sd 3:0:0:0: [sdc] CDB:
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.216937] Write(10): 2a 00 01 ab 80 00 00 23 1c 00
Jan 29 12:19:29 lenz-ThinkPad-T440 kernel: [ 599.216943] blk_update_request: I/O error, dev sdc, sector 224133120

This seems to be a regression in the mainline Kernel, as the default kernel (3.13.0-44-generic) performed this dd operation without issues - but it seems to be using a different USB driver for the disk:

Jan 29 11:38:13 lenz-ThinkPad-T440 kernel: [ 145.440600] usb 3-1: new SuperSpeed USB device number 5 using xhci_hcd
Jan 29 11:38:13 lenz-ThinkPad-T440 kernel: [ 145.457727] usb 3-1: New USB device found, idVendor=04e8, idProduct=6125
Jan 29 11:38:13 lenz-ThinkPad-T440 kernel: [ 145.457737] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Jan 29 11:38:13 lenz-ThinkPad-T440 kernel: [ 145.457741] usb 3-1: Product: D3 Station
Jan 29 11:38:13 lenz-ThinkPad-T440 kernel: [ 145.457745] usb 3-1: Manufacturer: Samsung
Jan 29 11:38:13 lenz-ThinkPad-T440 kernel: [ 145.457749] usb 3-1: SerialNumber: 00000000011E0A49
Jan 29 11:38:13 lenz-ThinkPad-T440 kernel: [ 145.476665] usb-storage 3-1:1.0: USB Mass Storage device detected
Jan 29 11:38:13 lenz-ThinkPad-T440 kernel: [ 145.476777] scsi3 : usb-storage 3-1:1.0
Jan 29 11:38:13 lenz-ThinkPad-T440 kernel: [ 145.477201] usbcore: registered new interface driver usb-storage
Jan 29 11:38:14 lenz-ThinkPad-T440 kernel: [ 146.477555] scsi 3:0:0:0: Direct-Access Samsung D3 Station 0202 PQ: 0 ANSI: 6
Jan 29 11:38:14 lenz-ThinkPad-T440 kernel: [ 146.478329] sd 3:0:0:0: Attached scsi generic sg2 type 0
Jan 29 11:38:14 lenz-ThinkPad-T440 kernel: [ 146.479586] sd 3:0:0:0: [sdc] Spinning up disk...
Jan 29 11:38:25 lenz-ThinkPad-T440 kernel: [ 151.993125] ......ready
Jan 29 11:38:25 lenz-ThinkPad-T440 kernel: [ 157.014200] sd 3:0:0:0: [sdc] 976754645 4096-byte logical blocks: (4.00 TB/3.63 TiB)
Jan 29 11:38:25 lenz-ThinkPad-T440 kernel: [ 157.014797] sd 3:0:0:0: [sdc] Write Protect is off
Jan 29 11:38:25 lenz-ThinkPad-T440 kernel: [ 157.014807] sd 3:0:0:0: [sdc] Mode Sense: 2b 00 10 08
Jan 29 11:38:25 lenz-ThinkPad-T440 kernel: [ 157.015382] sd 3:0:0:0: [sdc] Write cache: enabled, read cache: enabled, supports DPO and FUA
Jan 29 11:38:25 lenz-ThinkPad-T440 kernel: [ 157.015967] sd 3:0:0:0: [sdc] 976754645 4096-byte logical blocks: (4.00 TB/3.63 TiB)
Jan 29 11:38:25 lenz-ThinkPad-T440 kernel: [ 157.041599] sdc: sdc1
Jan 29 11:38:25 lenz-ThinkPad-T440 kernel: [ 157.042036] sd 3:0:0:0: [sdc] 976754645 4096-byte logical blocks: (4.00 TB/3.63 TiB)
Jan 29 11:38:25 lenz-ThinkPad-T440 kernel: [ 157.043099] sd 3:0:0:0: [sdc] Attached SCSI disk
Jan 29 11:38:25 lenz-ThinkPad-T440 kernel: [ 157.375933] EXT4-fs (sdc1): mounted filesystem with ordered data mode. Opts: (null)

Another (probably unrelated) observation: even if the file system is just mounted and idle (no processes accessing it), the disk drive LED shows activity. "iostat 3 /dev/sdc" reveals that something seems to be writing to the disk continuously:

avg-cpu: %user %nice %system %iowait %steal %idle
           2,85 0,00 0,67 1,43 0,00 95,05

Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
sdc 5,33 0,00 4782,67 0 14348

avg-cpu: %user %nice %system %iowait %steal %idle
           2,35 0,00 0,84 1,34 0,00 95,47

Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
sdc 5,00 0,00 4781,33 0 14344

avg-cpu: %user %nice %system %iowait %steal %idle
           4,85 0,00 0,75 1,34 0,00 93,05

Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
sdc 4,33 0,00 4097,33 0 12292
---
ApportVersion: 2.14.1-0ubuntu3.6
Architecture: amd64
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
InstallationDate: Installed on 2014-09-15 (136 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
Package: linux (not installed)
Tags: trusty
Uname: Linux 3.19.0-031900rc6-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip disk docker lpadmin plugdev sambashare sudo
_MarkForUpload: True

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1415859

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Lenz Grimmer (lenzgr)]

apport information

[Lenz Grimmer (lenzgr)]

I ran "apport-collect 1415859" as requested and changed the status to "Confirmed" now.

[Joseph Salisbury (jsalisbury)]

Can you boot back into the prior kernel can see if the I/O errors go away? It would be good to confirm this only happens with the mainline kernel.

[Lenz Grimmer (lenzgr)]

As I wrote in the initial report: "This seems to be a regression in the mainline Kernel, as the default kernel (3.13.0-44-generic) performed this dd operation without issues - but it seems to be using a different USB driver for the disk"

I also included the relevant kernel output.

[penalvch (penalvch)]

Lenz Grimmer, thank you for taking the time to report this bug and trying to help make Ubuntu better. However, the mainline kernel is not a software package provided by the official Ubuntu repositories. For more on this, please see https://wiki.ubuntu.com/Kernel/MainlineBuilds#Does_the_kernel_team_support_the_mainline_kernel_builds.3F . Because of this the Ubuntu project can not support or fix your particular bug. Please report this bug to the provider of the software package. Thanks!

If you are interested in learning more about software repositories and Ubuntu, check https://help.ubuntu.com/community/Repositories