Hi,
I’m setting up a new TrueNAS SCALE 25.10.1 server (Dell PowerEdge R670) with a HBA465e dual-port card connected via 2 ports to the same backplane hosting 60 disks.
In the HBA BIOS and during pool creation, the system sees 120 disks instead of 60, and TrueNAS throws the following warning:
“There are 120 disks available that have non-unique serial numbers. Non-unique serial numbers can be caused by a cabling issue and adding such disks to a pool can result in lost data.”
This is clearly caused by the dual-port HBA creating 2 paths to each disk (60 × 2 = 120). However, multipathd is not present on this version (Unit multipathd.service could not be found), so there is no way to aggregate the paths at OS level.
TrueNAS Storage > Disks correctly shows 60 disks, and IPMI also sees 60 disks, so the underlying detection seems fine.
The server is located in a datacenter so physically disconnecting one cable to test with a single path is not straightforward. Furthermore, losing cable redundancy does not seem like the best solution, especially in a datacenter environment.
Questions:
Is it safe to create a ZFS pool in this configuration despite the warning ?
Is there an official way to handle dual-port HBA multipathing on TrueNAS SCALE 25.10.1 ?
Is there a recommended configuration for this use case ?
Would it work with only one cable connected ?
Thanks