this post was submitted on 24 Jan 2024
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No TRIM support on Samsung 850 SSDs using PowerEdge 730XD & H730 Mini (RAID card) (zerobytes.monster)
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The original was posted on /r/homelab by /u/Rhyeayce on 2024-01-24 04:15:39+00:00.

The problem is that when I run zpool trim rpool I get cannot trim: no devices in pool support trim operations. I understood that this is pretty bad for SSD performance (varying by age of model). 1 Correct me if I'm wrong, but I suspect that this is especially bad with ZFS.

The two SSDs are Samsung 850 EVO which specs state have TRIM support 1 2, and it reads it available through smartctl as well as hdparm -I /dev/sd*.

I've tried to use HBA mode via the BIOS menu's controls of the H730 RAID card, and it still doesn't work. I have reason to believe that it's not 'true' HBA. 1 2 3

Given that the SSD and OS (Proxmox 8.1.4, Kernel: 6.5.11-7-pve) support TRIM, I strongly suspect that the culprit is the H730 RAID part.

What can I do to get TRIM support for my SSDs using the PowerEdge 730XD?

Ideally, there's something that I can do with just this hardware, but I'm open to replacing the H730 Mini Raid Controller.

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