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Hello everyone,
I recently assembled a computer with an Asrock Z87 Extreme6 motherboard: LINK.
On the Intel controller it comes with, I set up a RAID 5 with 6 WD Red 4TB hard drives, so I have a 20TB partition.
The read speed is very good, but the write speed is extremely slow, copying an ISO file from another drive to the RAID gives rates of 8-10 megabytes/s.
I enabled the write cache in the Intel management panel, and now in the "As SSD Benchmark" I finally have consistent results in the tests, but when it comes down to it, when I copy a file, I still get the same result.
The drives are in SATA3 mode, the raid is done with a block size of 64kb, which is what was recommended when creating the RAID, and all the drivers are correct (by the way, the OS is Windows 8.1 x64).
I do have to say that in the Intel management panel it says that the RAID is still being built, but I have read that this really doesn't affect this issue, that if it's slow writing now, it will also be slow later.
Anyone have experience creating a RAID 5 with this controller?
Best regards and thanks
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The only thing I could tell you is to wait until the raid is built, keep in mind that it's a huge space and it takes its time. My experience with raids on Intel controllers (generally I think they are pretty decent for being "for everyone"), at the time of reconstruction, or revision after some failure, until it is finished, the performance drops exaggeratedly.
Then the type of disks also influences a lot, with the WD Greens I feel more reconstructions with Raid 1, for example.The server I work with daily has a Raid 5 (9TB) of several disks, and I don't remember having any problems, and as I told you, they are Greens and the day the Raid was created it took forever to finish and the installation of the OS itself was eternal in the meantime.
About the block size, I don't think it influences too much, but I understand that if you handle large files it usually gives better performance to put a larger size (128KB).
Greetings!!
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Could it be a problem with one of the disks? With just one being damaged, it affects the overall performance, I imagine that testing them individually is not an option. Anyway, writing to Raid 5 with more disks is slower if my memory serves me correctly, right? It could also be a problem with the disks.. for a configuration of this caliber, I would have perhaps mounted some REs and, while we're at it, a Raid10, but I imagine the controller doesn't support it.
