Cache strategy needed by turning off write cache on harddisk device

[Cybermage]

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I have the following configuration 2x 10 TB x300 toshiba harddisk's 1 x 2 TB 970 evo SSD.
L1 cache of 16 GB and and L2 cache of 1.42 TB and it works very good.
I have Cache hit rates of 98% when using starting virtual machines.

as inspiration of the following topic
https://www.romexsoftware.com/bbs2/en-u ... =33&t=4667

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i start experimenting to turn off the write cache on of my Toshiba 10 TB harddisk
then i copy a directory with files of the size in total of 280 GB the speed drops from 200 MB/s to 70 MB/s per second.
the directory contains files of diffent file sizes.
if there a way to of better handeling the write cache by primocache?
Please some advise on this matter.

[Jaga]

I've been told by Romex support in the past to simply leave the Windows write-caching algorithm at it's default setting. Enable write caching in that interface, but leave write-cache buffer flushing off.

[Cybermage]

Did some more experimenting and when i turn off write cache and turn on Defer write i got the same speed 200 MB/s. Only in the beginning the speed is higher think it is the burst.

[Support]

Windows write caching is happened on file system level which is handled first before PrimoCache disk level. When you turn off Windows write caching, file system will directly deliver write-data to disk, this takes some process time and causes speed down.