[SOLVED] Extremely slow SSD writes in USB3 to SATA enclosure?

[biogon]

Hi! Sorry, long time lurker, got a question.

I have a new Crucial MX500 1TB SATA SSD in a SATA-USB3 enclosure. Reads are not too bad, but writes are atrociously slow. It is a USB 3.0 (SS) port and USB 3.1 gen 2 (SS10) cable. Clean Win10 install, 21H1. i5-7200U laptop, 12Gb RAM. Updated BIOS and firmware. Crucial's self-test diagnostic reads successful.

Write caching enabled, "better performance" removal policy.

Any thoughts on diagnosing appreciated. Thank you!

This is my CrystalDiskMark:

 

[lvt]

Personally I would test the SSD directly by temporarily removing it from the enclosure and connect it to one of the motherboard's SATA slot to see how the SSD performs.

 

[biogon]

Well. That was a great idea. In my fervor I lost all my troubleshooting skills.

I didn't know SSDs could go sideways like this. Benchmark plugged directly into SATA.

Strange that the write speeds dropped even more.

 

[lvt]

Well. That was a great idea. In my fervor I lost all my troubleshooting skills.

I didn't know SSDs could go sideways like this. Benchmark plugged directly into SATA.

Strange that the write speeds dropped even more.

Ok so at least you know that it's not the adapter's fault.

It's either the computer or the SSD itself.

 

[biogon]

Yup, similar results on a desktop. Guess I'm going to have to make a warranty claim.

Thanks for the level-headed suggestion.

 

[mdd1963]

When an SSD is outperformed by 35X by a 5400 RPM spinning drive, you KNOW something is amiss....!!!!!!

 

[mdd1963]

This would be the first I've heard of an MX500 failure, having used /recommended so many of them myself....

 

[SkyNetRising]

Strange that the write speeds dropped even more.

How full is the drive?
SSDs slow down tremendously, when full.

 

[biogon]

How full is the drive?
SSDs slow down tremendously, when full.

Drive is completely empty. Formatted twice, in fact.

 

[biogon]

This would be the first I've heard of an MX500 failure, having used /recommended so many of them myself....

You and me both... I have a couple of them in various devices. It's baffling...

 

[Maxxify]

I would definitely check SMART (CrystalDiskInfo). Writes will become profoundly slow in some dire cases, but I would expect the drive to enter read-only mode by that point.