Hello everyone, I’m looking into improving the performance of my TrueNAS SCALE system and would appreciate any insights from the community. Hardware Setup TrueNAS Host: HPE ProLiant DL380 Gen9 V4 w/ 2x Xeon E5-2699v4 22-Core 2.20 GHz, 128 GB ECC RAM, running TrueNAS 25.04.1. HBA: Broadcom/LSI SA…

[image] xrm: HBA: Broadcom/LSI SAS 9300-8e HBA in IT mode. External Enclosure: HPE D3710, connected via a single SFF-8644-SAS-3 cable (since TrueNAS doesn’t support multipath). If I understand the “multipath” limitation, it is multiple CONTROLLERs. Not additional SAS lanes. So I would immed…

Sounds normal. See my post in another thread. You would have to sort out where you are bottled [image] Slow write speed with high end config TrueNAS General Is looks like your performance is about normal going by the results on a test over at calomel.org The…

You need multiple threads writing - try --numjobs=10.

Well, I did try changing to more jobs, but that didn’t change the throughput, sadly: root@storage01[~]# fio --name=write-test --directory=/mnt/Pool1/Dataset1 --rw=write --bs=1M --size=20G --numjobs=10 --iodepth=64 --direct=1 --ioengine=libaio --group_reporting write-test: (g=0): rw=write, bs=(R) 10…

Maybe look at Solid State (Pure SSD) raids section? 24x data was closest to what you were expecting 1x 256GB a single drive 232 gigabytes ( w= 441MB/s , rw=224MB/s , r= 506MB/s ) 2x 256GB raid0 striped 464 gigabytes ( w= 933MB/s , rw=457MB/s , r=1020MB/s ) 2x 256GB raid1 mirror 232 gigabyt…

Clearly I was wrong about needing parallel jobs, but I think that @arwen has hit the target here. @SmallBarky 's link to ZFS Raidz Performance, Capacity and Integrity Comparison @ Calomel.org is interesting however there are a couple of caveats I have spotted that mean that it may not be useful for…

@SmallBarky & @Protopia Whoops, my bad. So at least x4 or ~ 1.5 GBps should be possible-ish. That’s still like x2 away from what I measured, I guess? Given that the individual disk’s performance is not worse for whatever reason (note to myself: test this just to be sure). The HBA is also connect by …

The second SAS cable made quite the difference: write-test: (g=0): rw=write, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=libaio, iodepth=64 fio-3.33 Starting 1 process Jobs: 1 (f=0): [f(1)][100.0%][w=1295MiB/s][w=1295 IOPS][eta 00m:00s] write-test: (groupid=0, jobs=1)…

[image] xrm: Thank you all, especially to @Arwen ! You’re welcome. [image] xrm: I’m still surprised that SAS can not load share the lanes better, but at least it works. Yes, me too. About 10 years ago, I remember reading that out of the 3 available multi-pathing software for Fibre Ch…

Unsure of performance of SSD setup with external disk enclosure

TrueNAS General

SmallBarky June 29, 2025, 12:25am 2

Sounds normal. See my post in another thread. You would have to sort out where you are bottled

Topic		Replies	Views
Added SSD's - everything is slower TrueNAS General SCALE	18	571	September 9, 2024
Performance issues on MC12-LE0 5700X vs i5 8400T TrueNAS General	49	916	May 18, 2025
Weird performance using excessive hardware TrueNAS General SCALE , Hardware , Performance	23	535	September 23, 2025
Can Someone Please Explain How SAS Works TrueNAS General Hardware , SAS	10	1385	November 18, 2024
Disks and VDEV TrueNAS General Hardware	35	942	July 3, 2025

Unsure of performance of SSD setup with external disk enclosure

Related topics