Performance vs. Transfer Size

All of our Iometer sequential tests happen at a queue depth of 1, which is indicative of a light desktop workload. It isn't too far fetched to see much higher queue depths on the desktop. The performance of these SSDs also greatly varies based on the size of the transfer. For this next test we turn to ATTO and run a sequential write over a 2GB span of LBAs at a queue depth of 4 and varying the size of the transfers.

The C300 and m4 performance curves are really interesting. The old C300 had much better small file sequential performance, while the m4 jumps ahead at larger block sizes. Most sequential transfers seem to happen at 64KB in Windows 7, which actually means the old C300 should perform better in sequential reads a lot of the time.

It's hard to tell given how crowded this chart is, but the m4 does have much better sequential write characteristics than the C300 regardless of transfer size. These results agree what what we saw in Iometer.

AnandTech Storage Bench 2011 - Light Workload AS-SSD Incompressible Sequential Performance
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  • sequoia464 - Sunday, May 8, 2011 - link

    From the scarce information and benchmarks that I have seen, the 470 appears to be a very viable option as far as SSD'd go. They have been out and available since last winter, and we have seen some of the 470's benchmarks posted in comparisons here for over a month. This drive seems to have the potential to be a major player in the SSD market, I don't understand why it hasn't been reviewed yet..

    Be really nice to see AnandTech's take on this drive.
  • yayati - Wednesday, June 15, 2011 - link

    I am a common user (IT professional) and do day to day tasks and planning to buy SSD. I have already tried 5 SSDS as of now

    Intel 510 120GB
    Crucial C300 (total crap, I shows 250GB from outside (Also ordered) but it showed me 59.0 GB when I started Win 7 install)
    Samsung 256GB
    Intel 510 250GB
    and 310 300GB on order

    I didn't notice any significant differences except Intel 510 120GB was bit good performer

    I am also planning to look @ m4 but not able to decide which one I should go for finally

    Can someone advise me? Intel has 5 yrs warrenty which seems more reliable but M4 is faster. Confussed!!!
  • wavefuture - Thursday, September 27, 2012 - link

    Guys, will Crucial M4 (e.g. CT128M4SSD2) work on SATA 1.5Gbps?
    I'm going to replace my old HDD for SSD. Please, help. Thanks!

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