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Slow Raid 5 on Z77 (ASRock Extreme 4)

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Apr 9, 2006
Falcon Heights, MN
Right now I am transferring some games from my ssd to my raid 5. Absolutely pathetic speeds. Transferring at 3.38MB/s on the one and only 70KB/s on the other transfer. Reads of course are fine but that writing issue is still plaguing me. At least if I transferred all the data off it would be quick. I get closer and closer every day to taking it all off and doing some comparisons depending on striping. I guess I just haven't gotten desperate enough. Though this moment right now is getting close.


New Member
Oct 8, 2014
It has been over a year since any activity on this post, but what the heck. I just setup RAID 5 on my system, I am using 4x2TB HDDs. My OS is installed on an SSD (C: drive) and the RAID is for data storage (D: drive). Here are my performance stats:
C drive Performance.jpg
D drive Performance.jpg

My Config:
Windows 7 64bit Home Premium SP1
ASRock Z77 Extreme4 – S/N 24M0XD072360
Intel Core I5-3570K
Sandisk SDSSDH-120GB-G25
Seagate Tech 2TB ST2000DM001
White Label 2TB WL2000GSA1672
White Label 2TB WL2000GSA1672
White Label 2TB WL2000GSA1672