ArdNsc

I did what you recommended. Have a new Pool with zfs raidz1 now. Thanks for the help.

Shows: [20036.654570] BTRFS: device fsid 0530b4fe-e499-4564-9465-33258fc10a71 devid 1 transid 236169 /dev/mapper/nvme1n1p1 (251:10) scanned by mount (1699987) [20036.654939] BTRFS info (device dm-10): first mount of filesystem 0530b4fe-e499-4564-9465-33258fc10a71 [20036.654949] BTRFS info (device dm-10): using crc32c (crc32c-lib) checksum algorithm [20036.705027] BTRFS info (device dm-10): enabling ssd optimizations [20036.705031] BTRFS info (device dm-10): enabling free space tree [20036.707844] BTRFS info (device dm-10 state M): turning on async discard [20088.423435] BTRFS info (device dm-7): relocating block group 27155866779648 flags data|raid5 [20150.855244] BTRFS info (device dm-7): relocating block group 27155866779648 flags data|raid5 [20800.756898] BTRFS info (device dm-7): relocating block group 27155866779648 flags data|raid5 [42723.637158] BTRFS info (device dm-7): relocating block group 27155866779648 flags data|raid5 Shows: [/dev/mapper/sdl1].write_io_errs 0 [/dev/mapper/sdl1].read_io_errs 0 [/dev/mapper/sdl1].flush_io_errs 0 [/dev/mapper/sdl1].corruption_errs 0 [/dev/mapper/sdl1].generation_errs 0 [/dev/mapper/sdm1].write_io_errs 0 [/dev/mapper/sdm1].read_io_errs 0 [/dev/mapper/sdm1].flush_io_errs 0 [/dev/mapper/sdm1].corruption_errs 0 [/dev/mapper/sdm1].generation_errs 0 [/dev/mapper/sdk1].write_io_errs 0 [/dev/mapper/sdk1].read_io_errs 0 [/dev/mapper/sdk1].flush_io_errs 0 [/dev/mapper/sdk1].corruption_errs 0 [/dev/mapper/sdk1].generation_errs 0 [/dev/mapper/sdj1].write_io_errs 0 [/dev/mapper/sdj1].read_io_errs 0 [/dev/mapper/sdj1].flush_io_errs 0 [/dev/mapper/sdj1].corruption_errs 0 [/dev/mapper/sdj1].generation_errs 0 [devid:5].write_io_errs 0 [devid:5].read_io_errs 0 [devid:5].flush_io_errs 0 [devid:5].corruption_errs 0 [devid:5].generation_errs 0

I will be afk for a few hours now; in the meantime I try to move some files off the pool onto the array in case I have to create a new pool. No critical data on the pool (all backed up), but it would be much less pain if I didn't have to gather everything back together from backups.

yes

Adds only one line to the syslog: Jun 16 15:35:21 Silver kernel: BTRFS info (device dm-7): relocating block group 27155866779648 flags data|raid5

Output: Error: error removing device 'missing': Input/output error

Yes, I do. (But I did what you suggested and recreated the pool with all 5 devices.) Should I try to run another balance now?

Attached new diagnostics

That worked fine. Please do. And do I add the pool with 4 or 5 disks? Remember, I was trying to remove one of them.

I stopped the array to remove a cache disk (I have 5 disk btrfs raid 5 as cache pool). I restarted the array, as expected the cache pool showed as degraded. I started a balance, which went surprisingly fast (too fast to have worked as I expected). I stopped the array again. I tried to start the array again, start array button did nothing. Pressed it 1-2 more times. No effect. I initiated a soft reboot. Then the GUI did not show up. I attached Monitor and Keyboard, soft rebooted once more. Still no GUI Rebooted in GUI mode, GUI does not work there either (no GUI loading in localhost). Attached latest Diagnostics. Help would be much appreciated. Thanks. Edit: GUI also does not show up in safe boot gui mode.

my condolences

I did that with the first folder now. While I got around 1TB free space on the old drive on the new target drive it took around 2TB of space, regarding to the used/free columns in the unraid UI. What I should have mentioned is that the fs on the "old" drive ("disk5") is btrfs and on the "new" one ("disk3") is zfs. Is that a problem?

/: Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/16p, 480M ID 1d6b:0002 Linux Foundation 2.0 root hub |__ Port 006: Dev 002, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M ID 051d:0002 American Power Conversion Uninterruptible Power Supply |__ Port 008: Dev 003, If 0, Class=Mass Storage, Driver=usb-storage, 480M ID 0781:5571 SanDisk Corp. Cruzer Fit /: Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/10p, 10000M ID 1d6b:0003 Linux Foundation 3.0 root hub |__ Port 005: Dev 005, If 0, Class=Mass Storage, Driver=usb-storage, 5000M ID 174c:55aa ASMedia Technology Inc. ASM1051E SATA 6Gb/s bridge, ASM1053E SATA 6Gb/s bridge, ASM1153 SATA 3Gb/s bridge, ASM1153E SATA 6Gb/s bridge /: Bus 003.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/2p, 480M ID 1d6b:0002 Linux Foundation 2.0 root hub /: Bus 004.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/2p, 10000M ID 1d6b:0003 Linux Foundation 3.0 root hub

It is somehow strange, because I never had that problem with that USB dock in the past. It cleared several huge disks flawlessly. Only recently it started dropping disks, also unassigned devices I use for backups. Is there anything that I can do to make the USB connection more reliable? And by the way, is this an unraid specific problem? Do get devices dropped regularly but other OSes do handle that somehow different? (I also had huge problems in the past when trying to utilize a usb ethernet controller with unraid. It also tended to drop out randomly which killed the network connection in a way a hard reset was the only option back then.) Is there anything that can be done on the user side besides avoiding anything usb-related when using unraid? Regarding my current problem I can only replace the array disk and rebuild the array without doing a long pre-clear check with the new drive. (No more free internal slots). Even with dual parity that makes me a little bit worried.

Thanks for the hint. Yes. Syslog indicates an USB disconnect at the time. Sep 18 11:03:42 * kernel: usb 2-5: USB disconnect, device number 3 Sep 18 11:03:42 * kernel: sd 0:0:0:0: [sda] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=DRIVER_OK cmd_age=1s Sep 18 11:03:42 * kernel: sd 0:0:0:0: [sda] tag#0 CDB: opcode=0x88 88 00 00 00 00 05 0b fb 32 08 00 00 08 00 00 00 Sep 18 11:03:42 * kernel: I/O error, dev sda, sector 21675848200 op 0x0:(READ) flags 0x84700 phys_seg 256 prio class 3 Sep 18 11:03:42 * kernel: device offline error, dev sda, sector 21675848200 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 3 Sep 18 11:03:42 * kernel: Buffer I/O error on dev sda, logical block 2709481025, async page read Sep 18 11:03:42 * kernel: device offline error, dev sda, sector 21675850248 op 0x0:(READ) flags 0x80700 phys_seg 256 prio class 3 Sep 18 11:03:42 * kernel: device offline error, dev sda, sector 21675848200 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 3 Sep 18 11:03:42 * kernel: Buffer I/O error on dev sda, logical block 2709481025, async page read Sep 18 11:03:42 * kernel: device offline error, dev sda, sector 21675851776 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 3 Sep 18 11:03:42 * kernel: Buffer I/O error on dev sda, logical block 2709481472, async page read Sep 18 11:03:42 * kernel: device offline error, dev sda, sector 21675855352 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 3 Sep 18 11:03:42 * kernel: device offline error, dev sda, sector 21675855352 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 3 Sep 18 11:03:42 * kernel: Buffer I/O error on dev sda, logical block 2709481919, async page read Sep 18 11:03:42 * kernel: device offline error, dev sda, sector 21675858928 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 3 Sep 18 11:03:42 * kernel: device offline error, dev sda, sector 21675858928 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 3 Sep 18 11:03:42 * kernel: Buffer I/O error on dev sda, logical block 2709482366, async page read Sep 18 11:03:42 * kernel: device offline error, dev sda, sector 21675862504 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 3 Sep 18 11:03:42 * kernel: Buffer I/O error on dev sda, logical block 2709482813, async page read Sep 18 11:03:42 * kernel: Buffer I/O error on dev sda, logical block 2709483260, async page read Sep 18 11:03:42 * kernel: Buffer I/O error on dev sda, logical block 2709483707, async page read Sep 18 11:03:42 * kernel: Buffer I/O error on dev sda, logical block 2709484154, async page read Sep 18 11:03:42 * kernel: Buffer I/O error on dev sda, logical block 2709484601, async page read Sep 18 11:03:42 * kernel: sd 0:0:0:0: [sda] Synchronizing SCSI cache Sep 18 11:03:42 * kernel: sd 0:0:0:0: [sda] Synchronize Cache(10) failed: Result: hostbyte=0x01 driverbyte=DRIVER_OK Sep 18 11:03:43 * emhttpd: offline: TOSHIBA_MG10ACA20TE_8572A0KNF4MJ (sda) 512 39063650304 Sep 18 11:03:52 * kernel: xhci_hcd 0000:00:14.0: Timeout while waiting for setup device command Sep 18 11:03:58 * kernel: xhci_hcd 0000:00:14.0: Timeout while waiting for setup device command Sep 18 11:03:58 * kernel: usb 2-5: device not accepting address 4, error -62 Sep 18 11:03:58 * kernel: usb 2-5: new SuperSpeed USB device number 5 using xhci_hcd Sep 18 11:03:58 * kernel: usb-storage 2-5:1.0: USB Mass Storage device detected Sep 18 11:03:58 * kernel: usb-storage 2-5:1.0: Quirks match for vid 174c pid 55aa: 400000 Sep 18 11:03:58 * kernel: scsi host0: usb-storage 2-5:1.0 Sep 18 11:03:59 * kernel: scsi 0:0:0:0: Direct-Access ASMT 2105 0 PQ: 0 ANSI: 6 Sep 18 11:03:59 * kernel: sd 0:0:0:0: Attached scsi generic sg0 type 0 Sep 18 11:03:59 * kernel: sd 0:0:0:0: [sda] Spinning up disk... Sep 18 11:04:07 * kernel: ........ready Sep 18 11:04:07 * kernel: sd 0:0:0:0: [sda] 39063650304 512-byte logical blocks: (20.0 TB/18.2 TiB) Sep 18 11:04:07 * kernel: sd 0:0:0:0: [sda] 4096-byte physical blocks Sep 18 11:04:07 * kernel: sd 0:0:0:0: [sda] Write Protect is off Sep 18 11:04:07 * kernel: sd 0:0:0:0: [sda] Mode Sense: 43 00 00 00 Sep 18 11:04:07 * kernel: sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA Sep 18 11:04:07 * kernel: sd 0:0:0:0: [sda] Attached SCSI disk Sep 18 11:04:09 * emhttpd: online: TOSHIBA_MG10ACA20TE_8572A0KNF4MJ (sda) 512 39063650304 Sep 18 11:04:09 * emhttpd: read SMART /dev/sda I cleared many disks successful with that usb dock in the past. I am running the preclear again now. If this also fails I will try a different usb-to-sata dockingstation. (Later the disk will be connected via sata internally obviously.)