Hi all! The problem is as follows. On the server 2 disks suddenly switched to the status DEGRADED. Auto-replacement for 2 spare disks started. The scanning process has started. Since the disk array is large (22 disks of 20 TB), the recovery time was 10 days. 8 days passed and a large number of er…

root@shd[~]# zpool status pool: SHD state: DEGRADED status: One or more devices is currently being resilvered. The pool will continue to function, possibly in a degraded state. action: Wait for the resilver to complete. scan: resilver in progress since Tue Apr 15 08:18:59 2025 109T scanned a…

Hi and welcome to the forums. Really sorry to hear about your issues. Clearly something more than drive failures has happened here but hard to guess what atm without system specs. Could you describe your hardware and in particular your chassis and HBA.

[image] Johnny_Fartpants: Could you describe your hardware and in particular your chassis and HBA Yes, of course! TrueNAS-13.0-U6.7 Supermicro x11ssh-ln4f Motherboard CPU Intel(R) Pentium(R) CPU G4400 @ 3.30GHz DIMM 4x16Gb ECC RAM Pool 22 disk RAIDZ3, TOSHIBA MG10ACA20TE 20TB Sata ASMed…

[image] Multiply your problems with SATA Port Multipliers and cheap SATA controllers Resources This resource was originally created by user: jgreco on the TrueNAS Community Forums Archive. Please DM this account or comment in this thread to claim it. In the last year or t…

22 is too wide. And there’s no (good) way all disks are attached to a single ASM1064, so some bits of the description are still missing. 14M data errors… Do you have a backup?

No, there are no backups. There is too much data… (230 TiB). Pool 24/7 writes a video archive of 140 cameras, surprisingly, it worked for 1 year without problems and stops. I found that ada17 has many errors according to SMART, so I replaced it, the recovery went faster and no new errors were added…

Controller: A SAS HBA; given the number of drives, either a 9305-24i or (rather) a 9207/9300-8i and an expander (e.g. AEC-82885T). Hopefully, taking out the poor SATA controller(s) will prevent further errors, but it will not cure errors which have crept into pool so you will lose some data—and if …

That is a failure mode I have seen, one SATA drive fails and many (if not all) that share the SATA Port Multiplier are seen as bad. You have found the truly bad drive, now you should be able to replace the failed drive and let the resilver fix what it can. I would take the advice from etorix and mo…

In zfs3 all disks have changed status to DEGRADED

TrueNAS General

Farout April 18, 2025, 7:59am 5

Topic		Replies	Views
5 of 6 Drives in zpool Dropped Into Degraded State TrueNAS General Hardware	9	140	January 18, 2026
Identical CKSUM errors across all 7 drives in a raidz1 TrueNAS General ZFS	6	121	July 13, 2026
Cascading failures while replacing a drive in RAIDZ2 TrueNAS General CORE , Hardware , ZFS	8	161	November 6, 2025
My pool appears to be in serious trouble TrueNAS General SCALE , Hardware , ZFS	19	281	October 1, 2025
Degraded pool on two brand new disk TrueNAS General CORE	8	260	November 5, 2024

In zfs3 all disks have changed status to DEGRADED

Related topics