P44pro Sequential writes are unusually slow

[alien]

 

Today, when I was copying a large number of files, I found that the writing speed of the p44pro was very slow.

Then I used CrystalDiskMark 8 to test it, and the sequential writing speed was only 2000MB/s.

I tried restarting and manually optimizing trim but it couldn't be solved.
I need help.

ps.Other ssd works fine, win11 23h2

[HewieGajanus]

Techpowerup did a writeup on this topic:

https://www.techpowerup.com/review/solidigm-p44-pro-2-tb-1-tb/6.html

~4000 MB/s SLC cache has limited capacity (apparently limited to ~300 GB total on the P44 Pro 2TB) and the drive can only write at that speed until the SLC cache becomes full. At that point the drive begins writing to much slower TLC flash at ~2000 MB/s.

When you do a test in Crystaldiskmark, there is no indicator to tell you how full your NVME SLC cache may currently be. That's why you can run 100 tests with different test sizes/ data types and get different write speed results.

It seems like ~2000 Mb/s sustained write speed is realistic for SEQ1M Q8T1 on this drive. You can expect burst speeds up to 4000 MB/s, but they could be infrequent depending on how frequently/ how much you're writing to your drive.