Hello,
I have MSI H97M ECO motherboard. My setup is:
Intel Pentium G3420
MSI H97M ECO
4x 4GB DDR3 1600Mhz RAM
1x SSD OCZ Vertex 4 128GB - for system
5x 640GB WD Green WD6400AACS
This is my home server hardware. I have Windows Server 2012 R2 installed.
"First, I would like to inform, that I have green drives because of little noise and lower heating. I have been using them for several years and these are working very well and I don't have reason to change them. Capacity is enough for me. I have had been using just four of them, because I had MB with just 4 drives in raid support. Therefore I bought new MB, to be able to use all of them."
This is my home server hardware. I have Windows Server 2012 R2 installed.
My problem is with RAID performance.
When I have all five drives in RAID 5, the performance is:
R:300MB/s W:25MB/s (When I disable write cache, it is only R:240MB/s W:8MB/s)
But When I setup RAID 5 only with four of them (any combination) the performance is OK:
R:260MB/s W:240MB/s sequential
Why is such a difference between 4 and 5 drives write speed?
Is there some limitation with Intel RST and amount of drives?
I have noticed, when I configure RAID with five drives, it is initialized automatically. But with four drives, the initialization can be done later manually.
I have latest version of RST and latest BIOS. The problem doesn't seem to be on the side of the motherboard manufacturer, but on Intel with H97 chipset.
I appreciate any comment
Thank you very much
Petr Janousek