By which query you know to ignore the idiot that posed it since you have an NVMe drive, not a SATA one (and AHCI is a protocol that only concerns SATA).
Ha. I'm learning by the minute with all this.rene wrote: ⤴Sat Dec 17, 2022 3:43 pm By which query you know to ignore the idiot that posed it since you have an NVMe drive, not a SATA one (and AHCI is a protocol that only concerns SATA).
The speed you should expect depends on how many PCIe lanes are routed to the M.2 slot which I couldn't for your system find on a quick google search but which I believe is often just 2 for laptops. PCIe 3.0 does 1GB/s per lane which would then make for 2GB/s max -- which is something your WD SN770 should be able to do for both read and write it seems.
The RND4K number seems to nicely comply but the SEQ1M does not, and the write speeds are for that drive pathetic even. I do not in fact know KDiskMark and can as such not say whether or not it's a software/display issue. Note that certainly if you're testing your "live" root system with for example KDE's indexer running amok at the same time that this wouldn't necessarily be unexpected. Is the drive an extra or your system drive? If latter I'd boot a Mint Live/Installer USB and use "Disks" from it (IIRC that it in fact has a benchmark) to double-check.
If the numbers are real definitely something's up. While admittedly not sure if that would matter or not, in that case make sure you don't have e.g. Intel RST mode set in your BIOS -- or alike. Look through it.
Ok. Figured it out, the issue was that the tests were being run on my live root system.
Haha, thanks again for the great reply.rene wrote: ⤴Sat Dec 17, 2022 5:03 pm Okay, that is looking seemingly good for your system then -- although it's also immediately clear that you don't have just 2 lanes routed to the M.2 slot. Supposedly 4 then and that could get you 4 GB/s read on seemingly all SN770 models: https://www.westerndigital.com/en-us/pr ... 0-nvme-ssd.
Some further googling led me to the information that the SN 770 is a DRAM-less SSD. Probably one able to use HMB (Host Memory Buffer), i.e., with the ability to snag some of your main DRAM to use -- which to me seems in essence fine -- but which I would absolutely not be confident saying your Acer laptop would support. Way to dilute your black brand, WD...
Anyways, given DRAM-less those write numbers as compared to the read ones in fact look okay to me, but I'd still be weary that the drive would fall flat on its face when you write enough data to overwhelm its (probably) SLC cache. How much that would be I could not in fact tell you: it's going to scale to your drive size. You could test things with, say, writing a 100G file to it from your Live system boot, syncing, and timing it but well, I'd probably in fact exchange the drive for a not DRAM-less one indeed, be it a PCIe 3 or 4 one, if I'd not be certain that my system could use HBM -- and try to figure something like that out from specs with Acer...
Feel free to ignore that if you're up for actually testing things directly but -- really WD? A DRAM-less Black branded drive? So I take it now Blue are real bottom of the barrel crap?
I'm staying with the old drive.rene wrote: ⤴Sat Dec 17, 2022 5:30 pm Well, yes, that looks to be better and for some tests significantly so. If you don't need additional space I'd probably stay with the old drive.
You have 8G now? While mostly okay-ish still for "desktop use" a doubling or even then quadrupling there would certainly matter. It seems to otherwise be a 2020 system with a Ryzen 5 3500U -- and I can assure you that that would be a lot more than I'd at the moment ever need from a mobile system. I.e., I'd say that upping the RAM and being happy makes sense.
