LUbuntu 20.04.1 root@charon:/home/amonra# lsusb Bus 002 Device 006: ID 059f:105f LaCie, Ltd 2Big Quadra USB3 Trying to format the above drive using mkfs.ext4 /dev/sdc2 Initially got a 120s Kernel timeout which I resolved by setting the timeout to 0 However I got LOTS of message groups in the system log looking like this: Nov 04 06:18:51 charon kernel: scsi host5: uas_eh_device_reset_handler start Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#0 uas_zap_pending 0 uas-tag 1 inflight: Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#0 CDB: Write Same(10) 41 00 e8 ea 47 fc 00 00 04 00 Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#1 uas_zap_pending 0 uas-tag 2 inflight: Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#1 CDB: Write Same(10) 41 00 e8 e6 48 00 00 ff ff 00 Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#2 uas_zap_pending 0 uas-tag 3 inflight: Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#2 CDB: Write Same(10) 41 00 e8 e9 47 fd 00 ff ff 00 Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#3 uas_zap_pending 0 uas-tag 4 inflight: Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#3 CDB: Write Same(10) 41 00 e8 e8 47 fe 00 ff ff 00 Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#4 uas_zap_pending 0 uas-tag 5 inflight: Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#4 CDB: Write Same(10) 41 00 e8 e7 47 ff 00 ff ff 00 Nov 04 06:18:51 charon kernel: usb 2-1: reset SuperSpeed Gen 1 USB device number 6 using xhci_hcd Nov 04 06:18:51 charon kernel: scsi host5: uas_eh_device_reset_handler success Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#0 FAILED Result: hostbyte=DID_RESET driverbyte=DRIVER_OK Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#0 CDB: Write Same(10) 41 00 e8 ea 47 fc 00 00 04 00 Nov 04 06:18:51 charon kernel: blk_update_request: I/O error, dev sdc, sector 3907667964 op 0x9:(WRITE_ZEROES) flags 0x1000800 phys_seg 0 prio class 0 Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#1 FAILED Result: hostbyte=DID_RESET driverbyte=DRIVER_OK Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#1 CDB: Write Same(10) 41 00 e8 e6 48 00 00 ff ff 00 Nov 04 06:18:51 charon kernel: blk_update_request: I/O error, dev sdc, sector 3907405824 op 0x9:(WRITE_ZEROES) flags 0x1000000 phys_seg 0 prio class 0 Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#2 FAILED Result: hostbyte=DID_RESET driverbyte=DRIVER_OK Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#2 CDB: Write Same(10) 41 00 e8 e9 47 fd 00 ff ff 00 Nov 04 06:18:51 charon kernel: blk_update_request: I/O error, dev sdc, sector 3907602429 op 0x9:(WRITE_ZEROES) flags 0x1000000 phys_seg 0 prio class 0 Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#3 FAILED Result: hostbyte=DID_RESET driverbyte=DRIVER_OK Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#3 CDB: Write Same(10) 41 00 e8 e8 47 fe 00 ff ff 00 Nov 04 06:18:51 charon kernel: blk_update_request: I/O error, dev sdc, sector 3907536894 op 0x9:(WRITE_ZEROES) flags 0x1000000 phys_seg 0 prio class 0 Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#4 FAILED Result: hostbyte=DID_RESET driverbyte=DRIVER_OK Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#4 CDB: Write Same(10) 41 00 e8 e7 47 ff 00 ff ff 00 Nov 04 06:18:51 charon kernel: blk_update_request: I/O error, dev sdc, sector 3907471359 op 0x9:(WRITE_ZEROES) flags 0x1000000 phys_seg 0 prio class 0 and while the command apparently ended cleanly it took a *very long* time (hours) root@charon:/home/amonra# mkfs.ext4 /dev/sdc2 mke2fs 1.45.5 (07-Jan-2020) Creating filesystem with 976701696 4k blocks and 244178944 inodes Filesystem UUID: f45b0cd6-131a-4a3a-988f-c5a848611445 Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 102400000, 214990848, 512000000, 550731776, 644972544 Allocating group tables: done Writing inode tables: done Creating journal (262144 blocks): done Writing superblocks and filesystem accounting information: done root@charon:/home/amonra# fsck /dev/sdc2 fsck from util-linux 2.34 e2fsck 1.45.5 (07-Jan-2020) /dev/sdc2: clean, 11/244178944 files, 15615751/976701696 blocks root@charon:/home/amonra# I'm not 100% convinced it did ... If I just attach and mount the drive I get: Nov 08 10:25:40 charon kernel: EXT4-fs (sdc2): recovery complete Nov 08 10:25:40 charon kernel: EXT4-fs (sdc2): mounted filesystem with ordered data mode. Opts: (null) Nov 08 10:26:12 charon kernel: sd 5:0:0:0: [sdc] tag#17 uas_eh_abort_handler 0 uas-tag 1 inflight: OUT Nov 08 10:26:12 charon kernel: sd 5:0:0:0: [sdc] tag#17 CDB: Write Same(10) 41 00 00 06 b7 98 00 10 00 00 Nov 08 10:26:12 charon kernel: scsi host5: uas_eh_device_reset_handler start Nov 08 10:26:12 charon kernel: usb 2-1: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd Nov 08 10:26:12 charon kernel: scsi host5: uas_eh_device_reset_handler success I then see a lot of message groups like this in the log: Nov 08 10:31:21 charon kernel: INFO: task jbd2/sdc2-8:104742 blocked for more than 241 seconds. Nov 08 10:31:21 charon kernel: Not tainted 5.4.0-52-generic #57-Ubuntu Nov 08 10:31:21 charon kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 08 10:31:21 charon kernel: jbd2/sdc2-8 D 0 104742 2 0x80004000 Nov 08 10:31:21 charon kernel: Call Trace: Nov 08 10:31:21 charon kernel: __schedule+0x2e3/0x740 Nov 08 10:31:21 charon kernel: schedule+0x42/0xb0 Nov 08 10:31:21 charon kernel: jbd2_journal_commit_transaction+0x258/0x17e8 Nov 08 10:31:21 charon kernel: ? __switch_to_asm+0x40/0x70 Nov 08 10:31:21 charon kernel: ? __switch_to_asm+0x34/0x70 Nov 08 10:31:21 charon kernel: ? __switch_to_asm+0x40/0x70 Nov 08 10:31:21 charon kernel: ? __switch_to_asm+0x34/0x70 Nov 08 10:31:21 charon kernel: ? __switch_to_asm+0x40/0x70 Nov 08 10:31:21 charon kernel: ? __switch_to_asm+0x34/0x70 Nov 08 10:31:21 charon kernel: ? __switch_to_asm+0x40/0x70 Nov 08 10:31:21 charon kernel: ? __switch_to_asm+0x40/0x70 Nov 08 10:31:21 charon kernel: ? __switch_to_asm+0x34/0x70 Nov 08 10:31:21 charon kernel: ? __switch_to_asm+0x34/0x70 Nov 08 10:31:21 charon kernel: ? wait_woken+0x80/0x80 Nov 08 10:31:21 charon kernel: ? try_to_del_timer_sync+0x54/0x80 Nov 08 10:31:21 charon kernel: kjournald2+0xb6/0x280 Nov 08 10:31:21 charon kernel: ? wait_woken+0x80/0x80 Nov 08 10:31:21 charon kernel: kthread+0x104/0x140 Nov 08 10:31:21 charon kernel: ? commit_timeout+0x20/0x20 Nov 08 10:31:21 charon kernel: ? kthread_park+0x90/0x90 Nov 08 10:31:21 charon kernel: ret_from_fork+0x35/0x40 Nov 08 10:31:21 charon kernel: INFO: task ext4lazyinit:104744 blocked for more than 241 seconds. Nov 08 10:31:21 charon kernel: Not tainted 5.4.0-52-generic #57-Ubuntu Nov 08 10:31:21 charon kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 08 10:31:21 charon kernel: ext4lazyinit D 0 104744 2 0x80004000 Nov 08 10:31:21 charon kernel: Call Trace: Nov 08 10:31:21 charon kernel: __schedule+0x2e3/0x740 Nov 08 10:31:21 charon kernel: schedule+0x42/0xb0 Nov 08 10:31:21 charon kernel: schedule_timeout+0x10e/0x160 Nov 08 10:31:21 charon kernel: io_schedule_timeout+0x1e/0x50 Nov 08 10:31:21 charon kernel: wait_for_completion_io+0xb1/0x120 Nov 08 10:31:21 charon kernel: ? wake_up_q+0x70/0x70 Nov 08 10:31:21 charon kernel: submit_bio_wait+0x60/0x90 Nov 08 10:31:21 charon kernel: blkdev_issue_zeroout+0x13f/0x220 Nov 08 10:31:21 charon kernel: ext4_init_inode_table+0x195/0x386 Nov 08 10:31:21 charon kernel: ext4_lazyinit_thread+0x2c7/0x3b0 Nov 08 10:31:21 charon kernel: kthread+0x104/0x140 Nov 08 10:31:21 charon kernel: ? ext4_unregister_li_request+0x70/0x70 Nov 08 10:31:21 charon kernel: ? kthread_park+0x90/0x90 Nov 08 10:31:21 charon kernel: ret_from_fork+0x35/0x40 Nov 08 10:32:14 charon kernel: scsi host5: uas_eh_device_reset_handler start Nov 08 10:32:14 charon kernel: sd 5:0:0:0: [sdc] tag#9 uas_zap_pending 0 uas-tag 1 inflight: Nov 08 10:32:14 charon kernel: sd 5:0:0:0: [sdc] tag#9 CDB: Write Same(10) 41 00 00 06 b7 98 00 10 00 00 Nov 08 10:32:14 charon kernel: usb 2-1: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd Nov 08 10:32:14 charon kernel: scsi host5: uas_eh_device_reset_handler success Nov 08 10:32:28 charon systemd[1]: Started Run anacron jobs. Nov 08 10:32:28 charon anacron[107039]: Anacron 2.3 started on 2020-11-08 Nov 08 10:32:28 charon anacron[107039]: Normal exit (0 jobs run) Nov 08 10:32:28 charon systemd[1]: anacron.service: Succeeded. Nov 08 10:33:22 charon kernel: INFO: task jbd2/sdc2-8:104742 blocked for more than 362 seconds. Nov 08 10:33:22 charon kernel: Not tainted 5.4.0-52-generic #57-Ubuntu Nov 08 10:33:22 charon kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 08 10:33:22 charon kernel: jbd2/sdc2-8 D 0 104742 2 0x80004000 Nov 08 10:33:22 charon kernel: Call Trace: Nov 08 10:33:22 charon kernel: __schedule+0x2e3/0x740 Nov 08 10:33:22 charon kernel: schedule+0x42/0xb0 Nov 08 10:33:22 charon kernel: jbd2_journal_commit_transaction+0x258/0x17e8 Nov 08 10:33:22 charon kernel: ? __switch_to_asm+0x40/0x70 Nov 08 10:33:22 charon kernel: ? __switch_to_asm+0x34/0x70 Nov 08 10:33:22 charon kernel: ? __switch_to_asm+0x40/0x70 Nov 08 10:33:22 charon kernel: ? __switch_to_asm+0x34/0x70 Nov 08 10:33:22 charon kernel: ? __switch_to_asm+0x40/0x70 Nov 08 10:33:22 charon kernel: ? __switch_to_asm+0x34/0x70 Nov 08 10:33:22 charon kernel: ? __switch_to_asm+0x40/0x70 Nov 08 10:33:22 charon kernel: ? __switch_to_asm+0x40/0x70 Nov 08 10:33:22 charon kernel: ? __switch_to_asm+0x34/0x70 Nov 08 10:33:22 charon kernel: ? __switch_to_asm+0x34/0x70 Nov 08 10:33:22 charon kernel: ? wait_woken+0x80/0x80 Nov 08 10:33:22 charon kernel: ? try_to_del_timer_sync+0x54/0x80 Nov 08 10:33:22 charon kernel: kjournald2+0xb6/0x280 Nov 08 10:33:22 charon kernel: ? wait_woken+0x80/0x80 Nov 08 10:33:22 charon kernel: kthread+0x104/0x140 Nov 08 10:33:22 charon kernel: ? commit_timeout+0x20/0x20 Nov 08 10:33:22 charon kernel: ? kthread_park+0x90/0x90 Nov 08 10:33:22 charon kernel: ret_from_fork+0x35/0x40 Nov 08 10:33:22 charon kernel: INFO: task ext4lazyinit:104744 blocked for more than 362 seconds. Nov 08 10:33:22 charon kernel: Not tainted 5.4.0-52-generic #57-Ubuntu Nov 08 10:33:22 charon kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 08 10:33:22 charon kernel: ext4lazyinit D 0 104744 2 0x80004000 Nov 08 10:33:22 charon kernel: Call Trace: Nov 08 10:33:22 charon kernel: __schedule+0x2e3/0x740 Nov 08 10:33:22 charon kernel: schedule+0x42/0xb0 Nov 08 10:33:22 charon kernel: schedule_timeout+0x10e/0x160 Nov 08 10:33:22 charon kernel: io_schedule_timeout+0x1e/0x50 Nov 08 10:33:22 charon kernel: wait_for_completion_io+0xb1/0x120 Nov 08 10:33:22 charon kernel: ? wake_up_q+0x70/0x70 Nov 08 10:33:22 charon kernel: submit_bio_wait+0x60/0x90 Nov 08 10:33:22 charon kernel: blkdev_issue_zeroout+0x13f/0x220 Nov 08 10:33:22 charon kernel: ext4_init_inode_table+0x195/0x386 Nov 08 10:33:22 charon kernel: ext4_lazyinit_thread+0x2c7/0x3b0 Nov 08 10:33:22 charon kernel: kthread+0x104/0x140 Nov 08 10:33:22 charon kernel: ? ext4_unregister_li_request+0x70/0x70 Nov 08 10:33:22 charon kernel: ? kthread_park+0x90/0x90 Nov 08 10:33:22 charon kernel: ret_from_fork+0x35/0x40 Nov 08 10:34:15 charon kernel: scsi host5: uas_eh_device_reset_handler start Nov 08 10:34:15 charon kernel: sd 5:0:0:0: [sdc] tag#1 uas_zap_pending 0 uas-tag 1 inflight: Nov 08 10:34:15 charon kernel: sd 5:0:0:0: [sdc] tag#1 CDB: Write Same(10) 41 00 00 06 b7 98 00 10 00 00 Nov 08 10:34:15 charon kernel: usb 2-1: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd Nov 08 10:34:15 charon kernel: scsi host5: uas_eh_device_reset_handler success Any guidance and help much appreciated. David