There has been some reports from our customers regarding significant Slow WRITE speed on the NVMe SSD detected while the READ Speed is normal. We strongly believe that the issue would be corrected in the next Mac OS update, hopefully.
So far, we do know that Samsung 970 Pro, Samsung 980 Pro, Corsair MP400 SSDs are working well and not affected by the WRITE speed limitation on M1 computers.
You may also wanna have a look at this article here: https://origin-discussions2-us-dr-prz.apple.com/en/thread/253097384
We've tested on 24MAR2022, and the Slow WRITE speed limitation is still there.
The adata sx8200 pro is extremely slow when formated in afps, in ex fat ia running at around 1500 mb/s W/R. This must be an issue for you to fix.
Hi there, could you tell me if the new SK Hynix p41 Platinum 2TB NVMe SSD can work properly with your Thunderbolt 40GBps device? And whether the Mac Mini M1 is causing slow write speed with it? The Hynix p41 is a much improved version of the old gold version. Thank you so much.
Yeah, I watched a YouTube video of someone building a drive with the TB3 / USB enclosure and a Sabrent Rocket NVMe 4.0 and loving it, so I followed suit... before reading your help docs here - my bad. However, the BMDST results I got are not terrible: Is the slight write speed slowdown (2341 MB/s) the only downside to using Sabrent drives with an M1 Mac? If not, it's not that bad? I am going to see if I can replicate the freezing or ejecting reported. I got both drive and enclosure on Amazon, so I'm sure I could return the drive for a Samsung...
Has anyone had any luck with Crucial P3 units?
Not bad speed with Samsung SSD 980 PRO 1TB (production date 2022-03-02). Me like it 😎.
P.S.: SSD automatically detected, formatted as APFS drive
Wow! Thanks for the link, it's a really useful piece of information on M1 computer's slower WRITE speed. Will do some tests here. LINK: https://eshop.macsales.com/blog/74383-faster-drive-performance-with-m1-mac/
An OWC engineer found that the M1 mac mini is reserving bandwidth in case a thunderbolt display is connected. Once one is connected then the reservation dissapears and full write speed can be obtained. I suppose that assumes the display does not need as much bandwidth as was reserved. Here is the OWC blog post:
https://eshop.macsales.com/blog/74383-faster-drive-performance-with-m1-mac/
Latest update of SSD compatible list, as of 14APR2022.
Please update compatibility list to state slow write speeds for WD SN700 on macOS M1.
Here's an update from a dear customer of ours RT, he's using Samsung 980 PRO 1TB installed in our Thunderbolt 3 PCIe 3.0 NVMe SSD Enclosure with a MacBook pro M1 2020 and the READ / WRITE speed both have been pretty sweet to look at, all above 2500 Mbps. The Samsung 980 PRO is proven that its WRITE speed has NOT been affected by the M1 chip computer.