On Tue, 2022-03-08 at 22:53 -0500, R. G. Newbury wrote: > > From: Patrick O'Callaghan <pocallag...@gmail.com> > > On Mon, 2022-03-07 at 23:35 -0500, R. G. Newbury wrote: > > > Has a 240G SSD for Fedora, and 2 500G nvme ssd's for storage > > > (both in > > > adapters as the MB has no M.2 slots). > > > > Somewhat OT, but do you notice a difference between the SSD and the > > NVMe+adapter combos? I don't have M.2 slots either and wondered if > > it > > made sense for me (I have a good SATA3 SSD already). > > poc > I wondered the same thing. And also whether it made a difference > which > PCIE x16 slot contained which hardware (including the nvidia GT9700 > video card. > I ran a test transferring 3GB from RAM tmpfs to each drive *using > rsync*. That was too small a test to show any substantive difference. > Spurred by your request I ran it again writing 23GB to each storage > unit. I used rsync on a folder containing many various size files as > a > real world test. > Transfer 23G using rsync -a > SSD Crucial (2012) > Disk model: M4-CT256M4SSD2 > Tue 08 Mar 2022 09:14:41 PM EST > Tue 08 Mar 2022 09:19:38 PM EST > Diff 4:57 > NVME0 WD Black SN750 (2019) > Disk model: WDS500G3X0C-00SJG0 > Tue 08 Mar 2022 09:19:38 PM EST > Tue 08 Mar 2022 09:22:45 PM EST > Diff 3:07 > HD WD Red (2012) > Disk model: WDC WD10EFRX-68F > Tue 08 Mar 2022 09:22:45 PM EST > Tue 08 Mar 2022 09:28:56 PM EST > Diff 6:11 > NVME1 > Tue 08 Mar 2022 09:28:56 PM EST > Tue 08 Mar 2022 09:31:59 PM EST > Disk model: Samsung SSD 970 EVO Plus 500GB > Diff 3:03 > > So yes the NVME drives were substantially faster than the (now-old) > SSD > transferring in 60% of the time of the SSD. > I expected a greater difference between the 2 NVME drives given that > the > Samsung 970 touts a substantially higher write capability. > NVME0 is mounted in a Startech adapter: cost$13.00 Cdn about a year > ago. > NVME1 is mounted in a axGear adapter, purchased through Best Buy for > a > staggering $10.99 Cdn on sale, with free shipping! So the M.2 plus > adapter cost me $102 including tax. Very happy. Recommended. > > Only caveat is that you need a free long PCIE x16 slot (although each > adapter/M.2 only uses x4 for the 4 channels that each M.2 uses. So > slot > sharing is not actually a problem as between multiple adapters. I am > going to swap the video card around to see if that might make a > difference although I doubt it will. > > Available here until March 10 at $10.99: > https://www.bestbuy.ca/en-ca/product/axgear-m-2-nvme-ssd-ngff-to-pci-e-adapter-m-key-interface-card-m2-to-pci-express/13276627 > > If you want more storage the Asus Ultra Quad at around $90 will > handle 4 > M.2 up to 2280 drives and will handle a RAID storage setup.
Thanks for the detailed info. My current SSD is a Samsung 860 EVO (2TB) so for comparison I did this: $ time dd if=/dev/zero bs=1G count=23 of=Big 23+0 records in 23+0 records out 24696061952 bytes (25 GB, 23 GiB) copied, 14.9873 s, 1.6 GB/s real 0m15.087s user 0m0.000s sys 0m14.640s However that's clearly not a reflection of actual I/O speed as the writes will have been cached. poc _______________________________________________ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
