Re: Ramdisk small block low speed.
Posted: Sat Jul 03, 2021 11:33 pm
Apologies about mistaking SSP, though if Windows Defender (WD) is your only scanner, you should consider replacing or supplementing it with other security software (this is very much a topic for another thread though).
The System properties look OK with fancyrd.sys having 8 threads to correspond with the queue size of that CDM benchmark. It might be worth rerunning with WD disabled (disconnect from the Internet when doing this to limit risk to your system) since, according to this File Copy Benchmark (the "Results and Findings" section at the end), Windows 8 file access was significantly slowed down by WD, so the same is likely to apply to Win10.
However the same site has a Ramdisk Benchmark (sorry Romex, Primo not included!) and the ratio between sequential and random 4K does appear more in line with your results (my experience was based on an earlier version of CDM which I keep to compare with old results) so it seems that CDM is now much more demanding with random read/writes.
The System properties look OK with fancyrd.sys having 8 threads to correspond with the queue size of that CDM benchmark. It might be worth rerunning with WD disabled (disconnect from the Internet when doing this to limit risk to your system) since, according to this File Copy Benchmark (the "Results and Findings" section at the end), Windows 8 file access was significantly slowed down by WD, so the same is likely to apply to Win10.
However the same site has a Ramdisk Benchmark (sorry Romex, Primo not included!) and the ratio between sequential and random 4K does appear more in line with your results (my experience was based on an earlier version of CDM which I keep to compare with old results) so it seems that CDM is now much more demanding with random read/writes.