Question Trim on PNY Pro Elite V2 and SanDisk Extreme Pro "3.2" USB drives

[Helix FR]

Hi,

I need to know if those drives (PNY P-FD256PROV2-GE and Sandisk SDCZ880-128G-G46) have the trim feature (unmap via UASP I guess). I know that the Transcend ESD310C USB drive, the Kingston DataTraveler Max (A or C) USB drive, and the PNY Pro Elite V2 in its portable SSD version have it, but it seems it's not the case for the SanDisk Extreme Pro USB "3.1" for example which ends up having huge write speed drops because of that (I wonder if it has changed with the "3.2" version or if they are actually the same).

Could someone who has one of them please use the trimcheck application on it after formatting it to NTFS to see if this feature is available? Unless you have a better way to know that of course.

 

[helpstar]

SanDisk Extreme Pro 256GB USB Flash Drive (lack of) Performance

I've been seeing poor performance on my SanDisk Extreme Pro 256GB USB drive since its initial purchase in November 2017. I initially saw my drive easily hit the advertised speeds of 400+ MB/s reads and 300+ MB/s writes pretty continually. After 10 months of light use, I opened a ticket with...

www.techpowerup.com

did you read the last post in this thread? It´s all depending on the hardware used to run the USB drive. Trim is integrated on both drives, either the same or not

 

[Helix FR]

Yes, I read it.

About the SanDisk Extreme Pro:

Even though TRIM is reported as supported, we were unable to get it to work through the bridge configuration.

https://www.anandtech.com/show/8755/sandisk-extreme-pro-usb-30-flash-drive-capsule-review
But it was the "3.0" version, it might have changed but I need a proof. I asked Sandisk but they seem to ignore me.

And that's the answer I got from PNY:

Trim is not supported by usb drives only harddrives or portable drives.

It gives me the impression that they are lying or don't really know what they are talking about. Anyways, it may mean that their USB drives don't support trim but I'd like to be sure.

 

[USAFRet]

Just curious...why is this info so critical?

 

[Helix FR]

Because I want a USB drive that doesn't end up with bad speeds (especially for writing).

 

[USAFRet]

AFAIK, TRIM is not natively supported over USB, for any drive.

There are ways to force the OS to do it, but that is not dependent on the drive.

 

[Helix FR]

Unmap, which is actually a trim, is supported via UASP on NTFS.
Did you check the links from AnandTech about the ESD310C and the DataTraveler Max supporting trim?

 

[Helix FR]

I ended up buying the PNY Pro Elite V2 and confirm that trim is automatically working on NTFS. Same for the less expensive HP x911w that I also had the opportunity to test.
SanDisk confirmed me that their Extreme Pro still doesn't support trim though PNY ridiculously told me the same whereas it was wrong so it's probably not reliable.