Hello all, I’m experiencing a familiar problem while creating a pool from USB enclosure. However, my situation is a bit different than others. Namely: TrueNAS is not warning me about these disks having non-unique serial numbers. During pool creation and disk selection, disk serial numbers are pr…

USB enclosures are ‘not supported’ AVOID USB [image] Why you should avoid USB attached drives for data pool disks Resources This subject has been coming up quite often since about 2022. Perhaps because of TrueNAS Community Edition, (formerly SCALE), has brough…

Just to keep you and everyone updated: I have started working on the tool I’m talking about. It can be reached from here . Currently it mirrors exactly how TrueNAS is getting disk serial numbers. Next step is to improve the process, and write the bug report. The code is easy to run, is currently ve…

Hi, I’m having the exact same issue and I have the exact same feeling about the bug. Sadly not the same level of knowledge to dig as far as you did. Were you able to achive something? Thanks!!!

How are your disks attached? If it is USB or a USB enclosure, I doubt there will be any change. See the link in post 28

I made a ticket as well. Having a similar issue that creating a pool with non-USB disks fails because of alleged duplicate serials (None) of the USB boot pool. This wasn’t an issue when the main pool was created some versions ago. My first ticket was closed but this one at least was forwarded just t…

Link to ticket https://ixsystems.atlassian.net/browse/NAS-139947

Just to give you an update: We have movement on this issue. My ticket was just upgraded to Medium Priority and someone’s working on it. EDIT: Closed with indication that it should be fixed in 26.0.0 Beta 1 or 2

Hello, I am running into the same issue except I am not using a USB enclosure, just two SAS drives plugged in to my HBA card. Here are my serial numbers: E: ID_SERIAL=350000397dc893704 E: ID_SERIAL_SHORT=50000397dc893704 E: ID_SCSI_SERIAL=6780A0APT0EE E: ID_SERIAL=350000397cc8bcd9c E: ID_SERIAL_SH…

If you encounter a problem, you should use Report a Bug at the top right of the forums. Make sure to select the the version of TrueNAS you’re on and attach a Debug Dump. It may be a separate issue you are seeing.

Topology: Disks have duplicate serial numbers: None (sdb, sdc)

TrueNAS General

ProfessionalAmateur February 27, 2026, 12:12am 34

Thanks, I forgot to add the link.

Truenas folder not appearing on SMB and dataset

Topic		Replies	Views
Good ol - Disks have duplicate serial numbers: None - But they don't? TrueNAS General SCALE	26	1305	March 31, 2026
Disks have duplicate serial numbers: None (sdi, sdj) TrueNAS General SCALE	19	546	June 16, 2026
Error: topology Disks have duplicate serial numbers: None (sda, sdb, sdc) TrueNAS General SCALE , TrueNAS_as_VM	16	12464	June 26, 2026
Failed disk and frustrated with how immensely difficult it is to identify it TrueNAS General	64	2435	June 2, 2025
ATA Error Counts increasing TrueNAS General	32	1188	May 22, 2025

Topology: Disks have duplicate serial numbers: None (sdb, sdc)

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