Yesterday I added the 2nd parity drive to my array, which finished syncing after 18h hours.

When I came home to check if all was good (6h after) all disks were spun down (intentional). So I decided to stop the array to add another drive.

 

As soon as I stopped it one of my drives went missing. The two parity drives seems fine, as well the other seven array disks. Rebooted the pc.

I ran a fs check on the missing drive (now under Unassigned Disk Devices) because it appeared as corrupted. Fixed.

 

But now it shows as "new device" when I try to re-add to the array and it warns me it will be overwritten.

 

All data seems fine and still on that disk, but I don't want to risk to lose 6TB of data

unraid-server-diagnostics-20250402-2229.zip

Leave the disk unassigned, start the array and post new diags.

Array started after a fresh boot, the disk is being emulated and the "original" is under unassigned devices (unmounted)

unraid-server-diagnostics-20250403-1851.zip

SMART looks fine, so most likely a power/connection issue, the emulated disk1 is mounting, and assuming contents look correct, you can rebuild on top, recommend replacing the cables first to rule that out:

 

https://docs.unraid.net/unraid-os/manual/storage-management#rebuilding-a-drive-onto-itself

All cables have been checked, both sata (sas to sata) and power. Still marked as "new".

 

So now I can simply re-assign the disk to his original spot and restart the array and let it rebuilt the disk

Yep.

Data rebuild ongoing, estimated 12 hours. Everything seems to be fine, but I'll wait for it to finish befor marking as solved

Thanks for the quick response

Meanwhile it's doing the rebuild, I've started a preclear on a new (unasigned) disk. After half an hour my usb flash boot is now missing.

Idk if they are related, maybe too much stress on the usb drive after the reboots of the last few days? It's 5 years old

 

from the log:

Apr  3 20:55:07 Unraid-Server emhttpd: ST10000NM0156-2AA111_ZA20X5GZ (sdm) 512 19532873728
Apr  3 20:55:07 Unraid-Server emhttpd: read SMART /dev/sdm
Apr  3 21:04:13 Unraid-Server flash_backup: adding task: /usr/local/emhttp/plugins/dynamix.my.servers/scripts/UpdateFlashBackup update
Apr  3 21:23:11 Unraid-Server kernel: usb 1-6: USB disconnect, device number 3
Apr  3 21:23:11 Unraid-Server kernel: FAT-fs (sda1): Directory bread(block 393970) failed
Apr  3 21:23:11 Unraid-Server kernel: FAT-fs (sda1): Directory bread(block 393971) failed
Apr  3 21:23:11 Unraid-Server kernel: FAT-fs (sda1): Directory bread(block 393972) failed
Apr  3 21:23:11 Unraid-Server kernel: FAT-fs (sda1): Directory bread(block 393973) failed
Apr  3 21:23:11 Unraid-Server kernel: FAT-fs (sda1): Directory bread(block 393974) failed
Apr  3 21:23:11 Unraid-Server kernel: FAT-fs (sda1): Directory bread(block 393975) failed
Apr  3 21:23:11 Unraid-Server kernel: FAT-fs (sda1): Directory bread(block 393976) failed
Apr  3 21:23:11 Unraid-Server kernel: FAT-fs (sda1): Directory bread(block 393977) failed
Apr  3 21:23:11 Unraid-Server kernel: FAT-fs (sda1): Directory bread(block 393978) failed
Apr  3 21:23:11 Unraid-Server kernel: FAT-fs (sda1): Directory bread(block 393979) failed
Apr  3 21:23:12 Unraid-Server kernel: usb 1-6: new high-speed USB device number 5 using xhci_hcd
Apr  3 21:23:12 Unraid-Server kernel: ACPI Error: Aborting method \_SB.PCI0.GPP2.PTXH.RHUB.PO10._PLD due to previous error (AE_AML_UNINITIALIZED_ELEMENT) (20220331/psparse-529)
Apr  3 21:23:12 Unraid-Server kernel: ACPI Error: Aborting method \_SB.PCI0.GPP2.PTXH.RHUB.PO10._PLD due to previous error (AE_AML_UNINITIALIZED_ELEMENT) (20220331/psparse-529)
Apr  3 21:23:12 Unraid-Server kernel: usb-storage 1-6:1.0: USB Mass Storage device detected
Apr  3 21:23:12 Unraid-Server kernel: scsi host18: usb-storage 1-6:1.0
Apr  3 21:23:12 Unraid-Server emhttpd: Unregistered Flash device blacklisted (EBLACKLISTED2)
Apr  3 21:23:13 Unraid-Server emhttpd: Unregistered Flash device error (ENOFLASH3)
Apr  3 21:23:13 Unraid-Server kernel: scsi 18:0:0:0: Direct-Access     SanDisk  Ultra USB 3.0    1.00 PQ: 0 ANSI: 6
Apr  3 21:23:13 Unraid-Server kernel: sd 18:0:0:0: Attached scsi generic sg1 type 0
Apr  3 21:23:13 Unraid-Server kernel: sd 18:0:0:0: [sdn] 30031872 512-byte logical blocks: (15.4 GB/14.3 GiB)
Apr  3 21:23:13 Unraid-Server kernel: sd 18:0:0:0: [sdn] Write Protect is off
Apr  3 21:23:13 Unraid-Server kernel: sd 18:0:0:0: [sdn] Mode Sense: 43 00 00 00
Apr  3 21:23:13 Unraid-Server kernel: sd 18:0:0:0: [sdn] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
Apr  3 21:23:13 Unraid-Server kernel: sdn: sdn1
Apr  3 21:23:13 Unraid-Server kernel: sd 18:0:0:0: [sdn] Attached SCSI removable disk
Apr  3 21:23:15 Unraid-Server emhttpd: Unregistered Missing key file (ENOKEYFILE2)
Apr  3 21:23:15 Unraid-Server unassigned.devices: Disk with ID 'SanDisk_Ultra_USB_3.0_4C530000320815120460-0:0 ()' is not set to auto mount.
Apr  3 21:23:17 Unraid-Server kernel: fat__get_entry: 118 callbacks suppressed

 

Do I need to send another full-diagnostic or just the syslog?

Do you have a current flash backup?

I have a backup on "unraid-connect" dated: Last Flash Backup: Thu, Apr 3, 2025, 9:05 PM

 

And I think I've also set up an automatic backup to a local share. Now the array is in maintenance-mode, so I can't check it.

Edited April 4, 20251 yr by corla99