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4xRaid 0 Crucial m4 128gb? - Page 2

post #11 of 12
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Originally Posted by parsec View Post

I've been meaning to post in your thread, but did not get around to it until now.

I've used 128GB M4's in RAID 0, and they were very reliable. Of course four SSDs is more of a risk, but I've used four small 64GB SSDs in RAID 0 as the OS volume, and it works fine after almost a year of use, and no TRIM, on a SATA II board.

After looking at your benchmark results, it looks like you don't have Write Back cache enabled for that RAID 0 volume. Do you use the IRST GUI that is installed when the full IRST Windows installation program is run? You must enable Write Caching manually, it is not a default setting. It will increase your write performance quite a bit in benchmark results. You can also enable Write Caching in Windows Device Manager, in the entry for your RAID 0 volume. If you need some help with this, let me know.

What version of IRST are you using? What firmware version do you have on your M4's?

Intel recommends the 16K stripe size for SSDs in RAID 0, but that size does not produce as impressive benchmark results. In actual use, the 16K stripe is likely better in performance. You can't change the stripe size now without reinstalling Windows, so I would not worry about it.

Just for comparison purposes, this is two 128GB M4's in RAID 0 on two Intel 6Gb/s ports:

Notice how low your 4K writes are compared to this test. The difference in not just due to the SATA 6Gb/s interface. Given your other write results, enabling Write Caching will improve the 4K write speed substantially.

Your performance scaling with the additional drives is good, in some cases adding a fourth drive to a three drive RAID 0 volume results in somewhat different results.

In general, SSD prices seem to have leveled off lately, or even gone up IMO. If you got your new M4's for a good price, you have nothing to apologize for. You could also always have two RAID 0 volumes of two M4's each, and have the OS on the volume that is on the SATA 6Gb/s ports.

Thanks for the great info!

This is after following seans guide. I just hadn't gotten to it yet in the previous post because I wanted to get past "service pack" status. I got an error uploading the image.. But incase you don't want to open I scored 1670 on as ssd after seans guide which I am happy with.

after seans guide.jpg 377k .jpg file
post #12 of 12
Thread Starter 
This is after logging off for some garbage collection ~3 hours

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