Hello!

I posted on a earlier subject concerning this, however determined to open my very own thread, since I bought loads of benchmark information and knowledge that is perhaps useful.

I’ve had a four-drive RST RAID-5 array on a i9900K/ ASUS Z390-F that carried out OK over a number of years. Write efficiency with small recordsdata was not good, however not less than for greater recordsdata the efficiency was enough. I take advantage of the array for RAW picture storage, and as soon as the photographs are written to disk, they are going to simply be learn and small .xmp recordsdata and preview recordsdata are written to the disk.  

This is a benchmark from 2019, when the array was created:

Actual world efficiency, large file:

A number of months in the past one of many drives failed, and I rebuilt the array with a brand new drive.
I additionally upgraded the pc with the next specs:

ASUS Z790 ProArt Creator Wifi 
ASUS 4070 Proart OC
Intel 14900k
Kingston 2 TB 7300 MB/sec nvme SSD, system (C:) drive
2 x 2TB intel nvme SSD for initiatives
Corsair 2×32 GB 6000 MHz C40-40-40-77
4 x 16 TB Seagate IronWolf Professional in RAID-5 for storage
3 x 14 TB Western Digital 14 TB helium drives in RAID-0 for temp recordsdata/rendering initiatives
Corsair RM750x PSU
QNAP 832X NAS with 7×10 TB Western Digital in RAID-5 related with 10 Gb ethernet, for backup

I then expanded the RAID-5 array with one further 16 TB drive, making a complete of 5×16 TB. Increasing the array took 10 – TEN – days…

Stripe measurement is 128 kb.

And the write pace is now simply horrible:

The array is half full, so the learn speeds are inside expectations, I am getting 1000 MB/sec firstly of the array. However write pace is simply utterly lifeless.

Crystaldiskmark says 68 MB/sec write, however in actual world efficiency I am getting 18-19 MB/sec write on BIG recordsdata. It additionally looks like the array hangs for a complete minute generally, with write pace at ZERO and disk utilization 100%. 

Drives are NAS/RAID prepared drives rated at 260 MB/sec every.

As you possibly can see, the array hangs for a minute, then transferring with 40-50 MB/sec for 15-20 seconds, then hangs for an additional minute.  Response time varies between 2000-12000 ms, generally much more.

I’ve now tried 4 totally different variations of the RST drivers. Each from ASUS homepage and from Intel.com. Rebooted, replugged the drives, modified all elements, cables, PSU, just about tried all the pieces! Tried all write buffer modes, all the pieces!

For reference, these are the speeds I am getting on my previous NAS with 7×10 TB drives in RAID-5 over 10 GbE community:

I am anticipating related write speeds on my 5×16 TB array, however one thing could be very mistaken!