Hi TruNas members, SAS DIsks faster then SSD Disks? Measurements were taken on a Win10 PC with 10Gb connected to TrueNas Scale 10Gb.
In a test environment (without NVME disks) with 3 x SAS SDD disks with Raidz1 and a pool with 3 x SAS disks 300GB 10K Raidz1. I am surprised to see big differences. The Movieuser pool with 3 x 300GB SSD disks is slower than the Fileadmin pool with 3 x SAS disks.
Fileadmin share with 3 x SAS 10K disks file size 250Mb, block size 1MB
Seq. write speed 403(MByte/sec
Random QD32 17.5 MByte/sec, 4486 IOPS, 0.22ms
Seq. read speed 527MByte/sec
Random QD32 18.9MByte/sec, 4833.9 IOPS, 0.21ms
Movie Share:
Movie Share with 3 x SSD 200GB disks file size 250Mb, block size 1MB
Seq. write speed 153.7 MByte/sec
Random QD32 464.2 MByte/sec, 4538.7 IOPS, 0.22ms
Seq. read speed 464.2MByte/sec
Random QD32 17.7MByte/sec, 4538.7 IOPS, 0.22ms
measured with the Parkdale tool.
How can this be explained? The movie share with SSD disks is slower than the SAS disk pool (write speed).
Best regards
Novell1
