Throughput issue with M2.1 on Linux -> Asus ROG STRIX B360-I + Intel 660p NVMe PCIe M.2 1TB (SSDPEKNW010T8)

[auxinelectro]

hi all

I've just received a pcspecialist build with Asus ROG STRIX B360-I with Intel 660P SSDPEKNW010T8.

I have double checked the ASUS MB and its listed as GEN3 support -- I have set the PCIe Speed manually to GEN3 in the UEFI.

I have double checked the firmware of the Intel 660p it is at 002C

##READ speed is 1.1 GB/s

dd if=/dev/nvme0n1 of=/dev/null bs=4k count=1048576
1048576+0 records in
1048576+0 records out
4294967296 bytes (4.3 GB, 4.0 GiB) copied, 3.85106 s, 1.1 GB/s


##WRITE speed around the same at 990 MB/s

# echo 1 > /proc/sys/vm/drop_caches
# echo 2 > /proc/sys/vm/drop_caches
#echo 3 > /proc/sys/vm/drop_caches
# dd if=/dev/zero of=/dev/rootvg/testlv bs=4k count=1048576
1048576+0 records in
1048576+0 records out
4294967296 bytes (4.3 GB, 4.0 GiB) copied, 4.33664 s, 990 MB/s

#i have set discard in /etc/fstab
#grep discard /etc/fstab

/dev/mapper/rootvg-root / xfs defaults,discard 0 0


## appears to be hitting approx 1.1/1GB/s limit here... has anyone else experience this issue?

 

[Oussebon]

I've no idea. I'd probably try it in WIndows to see what it gets in Crystaldiskmark.

If it's fine there, it could be a Linux specific issue or it could be a result of that specific benchmark.

The 660p isn't a fast drive and if the benchmark isn't testing the drive in a way that showcases its level best performance (i.e. if it's a bit more real world than some other synthetic benches) I wouldn't be surprised to see those numbers. Or I would, in the sense I'd probably have expected lower...

 

[auxinelectro]

thanks for your reply, I dont have windows on this machine it's a Linux only system. I am seeing what looks like a hard 1Gbs limit.. the benchmark I am using is a pure block level read/write .. I am going to contact ASUS ..

 

[Oussebon]

I'd have suggested taking an image of the system, putting Windows on to test, then restoring the image of your Linux OS.

Why are you so sure it's the mobo? Have you tested this specific drive in another mobo in a system that was running Linux before?

 

[auxinelectro]

Hi the dd i was using is a sequential read/write according to the benchmark results people are getting 1.3-1.4 but I am seeing a flat 1Gbs

DRIVE

MB

I dont have any such windows image.. thanks for the idea tho

 

[auxinelectro]

Why are you so sure it's the mobo? Have you tested this specific drive in another mobo in a system that was running Linux before?

I am not sure.. I have set the mobo to gen3 for PCie support but looks like I am getting gen1 like performance

This is a brand new build from pcspecialist.. with a brand new drive and mobo.. hence why i tested and have put this post up..

 

[ubuysa]

Unfortunately PCS don't support Linux and there's no way to be certain that the problem doesn't lie with the OS, so Oussebon's suggestion of imaging your Linux system and putting Windows on there to test the SSD speed is really your best bet.....