Performance vs. Transfer Size

ATTO is a useful tool for quickly measuring the impact of transfer size on performance. You can get the complete data set in Bench.

I pointed this out in the 4KB random write section, but Samsung continues to do a great job of dealing with low queue depth transfers on the EVO. Performance is consistently great across all of the EVO capacity points. There's also no difference between the EVO's behavior here and the 840 Pro.

Random & Sequential Performance AnandTech Storage Bench 2011
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  • MrCommunistGen - Thursday, July 25, 2013 - link

    YES! I've been excitedly waiting for this review since the announcement! Reply
  • Byte - Thursday, July 25, 2013 - link

    Writes for the 120GB are still quite slow. Reply
  • chizow - Thursday, July 25, 2013 - link

    That's nearly universal though for all the entry-level capacity SSDs on the market, it's similar to RAID 0, when you can write to symmetrical NAND packages you see a significant increase in write speeds. Reply
  • OUT FOX EM - Monday, July 29, 2013 - link

    Speaking of RAID 0, if you'll notice, all the drives of 250GB and higher perform around the same. You are MUCH better off getting 4x250GB drives instead of the 1TB. With most models the cost will actually be about the same, but the speed of the RAID will be 4x faster as well while maintaining the same capacity.

    Of course there are other drawbacks like space inside your PC and amount of available SATA ports on your motherboard, for instance, but if those aren't a factor, buying multiple SSD's is a much better option in terms of performance. I don't see many reviews mention this fact.
    Reply
  • Jorgisven - Thursday, August 01, 2013 - link

    Much better in terms of performance, but I wouldn't recommend RAID 0 for 4 SSD hard drives. RAID6 is likely a better option, as it is fault tolerant without losing too much space. It's a bit of a personal decision, but the RAID concepts stand true whether it's SSD or not. Additionally, 4x250 is likely a good percentage more expensive than the already expensive 1TB SSD. Reply
  • Democrab - Thursday, August 15, 2013 - link

    I'm not sure about you, but I'm only storing replaceable data on my SSDs...There are game saves but they're automatically put on Google Drive too so I get backups easily, it's easy to set something like that up and then just get the benefits of RAID0 although I'd be using a RAID card as the chipset would likely bottleneck it. Reply
  • yut345 - Thursday, December 12, 2013 - link

    I agree. Due to the volatile nature of SSDs, and the fact that if they go down your data can't really be recovered like it could be on mechanical drive, I do not plan to store anything on the drive that I don't also back up somewhere else. Reply
  • m00dawg - Friday, August 23, 2013 - link

    With only 4 drives, a RAID10 would be much preferable. 1/2 the available space (same as a 4 drive RAID6 in this case), but without the need to calculate parity, worry (as much) about partitioning alignment, and you can still handle up to 2 drive failures (though only if they are on different stripes). Reply
  • fallaha56 - Friday, September 19, 2014 - link

    sorry but disagree this will defeat the point unless you're on a top-end raid controller -and then you get no TRIM

    when there's no moving parts reliability becomes much less of an issue, esp for an OS drive with cloud and local backup like most of us high-end users do
    Reply
  • Stas - Tuesday, September 24, 2013 - link

    That's what I did for the recent laser data processing builds. 4x250GB 840s and a 1TB HDD for nightly backup. Only data is stored on the array. Speeds are up to 1600MB/sec. Needless to say, the client is very happy :) Reply

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