Checking out the Copy performance under AS SSD, we can see that the Game and ISO testing is very strong on the m4 setup. On the other hand, we can see that the Program performance sits behind a bit. Talking to Crucial, we were told that because of the page size difference on the NAND media (4kb for C300 and 8KB for m4), under certain loads we can have a little more command overhead to pass the same amount of data.
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Something that Crucial mentioned to us was the stronger sustained performance on the new m4 drives when under RAID and that's extremely evident here as we can see only 25MB/s separates the minimum and the maximum. Overall this also results in a strong performance gain over the older setup with the minimum seeing a 40% boost in performance.
Something went wrong when testing Write performance on the C300 and it seems evident that it has something to do with the Garbage Collection. Ignoring the minimum and average for just a second, though, if we jump over to our original Crucial C300 256GB SSDs in RAID 0 article, it's really interesting to see the Maximum write performance for the setup on our older RAID card was 966MB/s.
I say interesting because over time we'd expect the performance to drop back slightly, instead we're seeing that performance is a bit stronger here. While we no doubt expect that to have a lot do with the new RAID card, we'd still expect the performance to have dropped back below our original results. There's either no or minimal performance drop, or the older ARC-1880i was holding our C300 setup back a fair bit.
Saying all that, performance on the newer drives is massive with a maximum read speed exceeding 1700MB/s.
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