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Sequential Performance Versus Transfer Size

Samsung Goes 6 Gb/s: Is The 830-Series SSD King Of The Hill?
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All of our sequential transfer tests in Iometer are run at a queue depth of one in order to represent the most typical desktop workloads. It's not hard to imagine a situation where an enthusiast might subject an SSD to higher queue depths, though. And indeed, that's where an SSD really stands apart from a conventional hard drive.

Here we're using ATTO to test the sequential reads/writes over 2 GB, starting with a queue depth of two. Why only a queue depth of two? Even when you're pushing more taxing workloads, I/O commands are handled so much faster on an SSD that queue depths higher than two or three are far less common on an average desktop.

The other reason to use ATTO is its ability to easily test different transfer sizes. While 128 KB is fairly standard for measuring sequential performance, larger or smaller transfers are of course still relevant.

Using a queue depth of two, we finally see the 256 GB 830 edge ahead of the 250 GB SSD 510, which is known for its sequential alacrity. There is, however, a margin of only 10 MB/s in Samsung's favor.

When we turn to sequential writes, we see the 830 struggle a bit compared to some of the other drives. Second-gen SandForce drives, in particular, pick up speed versus our tests with a queue depth of one. The Samsung 830 follows closely behind though, and it finished first amongst the SSDs not based on SandForce's technology.

The 256 GB Samsung 830 continues to dominate read performance even after we turn up the queue depth to four. But again, Samsung doesn't have a big advantage. Overall, we're still looking at performance similar to Intel's SSD 510. The difference is that the 830 runs 10-20 MB/s faster for transfer sizes between 32 KB and 256 KB.

Samsung's 830 is the odd ball in this test. Most drives tend to have better performance when we turn up queue depths. However, the 256 GB 830 actually drops as much as 100 MB/s when we push larger transfer sizes.

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Top Comments
  • 20 Hide
    kikireeki , September 23, 2011 2:00 PM
    When will we be seeing articles like: SSD price slashed 50%?
  • 20 Hide
    pbrigido , September 23, 2011 12:12 PM
    With all of these fast SSDs coming to market, I can only hope that the competition starts to drive down prices soon.
Other Comments
  • 20 Hide
    pbrigido , September 23, 2011 12:12 PM
    With all of these fast SSDs coming to market, I can only hope that the competition starts to drive down prices soon.
  • 0 Hide
    Anonymous , September 23, 2011 12:16 PM
    I still opt for the M4 in all the enthusiast builds I do!

    It boils down to reliability, not one hiccup on M4 yet (or any crucial drive Ive installed), 4/5 Sandforce drives I have installed have had some form of callback problem to resolve once deployed, mostly requiring firmware updates, but a few failed drives as well!

    Mind you, still better than the early Corsair force Series I used, every single one failed! Stopped using them quick!

    Am tempted by OCZ, once they have reliability on their side I will give them a go again!
  • 0 Hide
    Anonymous , September 23, 2011 12:57 PM
    Would love to see an article addressing Sandforce controller problems people have been experiencing.
  • 6 Hide
    mark_hamill , September 23, 2011 1:00 PM
    Would love to see an article addressing Sandforce controller problems people have been experiencing.
  • 3 Hide
    JamesSneed , September 23, 2011 1:02 PM
    Looks like a really nice SSD. Samsung has one of the best validation proceses along with Intel and Crucial so I really don't expect people to have issues like they do with OCZ drives. Now the real question how much will it be on the egg?

    I saw this quote below in the summary and laughed as nobody in there right mind would use a basic MLC drive in a database server. So Samsung tuned the drive for what it will be used in ,desktops, good.
    "Although we'd probably think twice before picking this as our first choice for a database server, it does just fine in an enthusiast's machine."
  • 20 Hide
    kikireeki , September 23, 2011 2:00 PM
    When will we be seeing articles like: SSD price slashed 50%?
  • -1 Hide
    JohnnyLucky , September 23, 2011 2:36 PM
    great review. now we just have to wait and see how the ssd will hold up over the long haul. If it is anything like the 470, then it should be problem free.
  • 0 Hide
    alikum , September 23, 2011 2:48 PM
    Make it $1 per GB at least
  • -3 Hide
    beenthere , September 23, 2011 3:04 PM
    We'll see how this series of Samsung SSDs fair. The previous gen was a nightmare of problems so I don't think Samsung's validation process is any better that the rest of the SSD suppliers - which is sad when Samsung controls everything including NAND production. It's amazing that we still have SSDs NOT readt for Prime Time.
  • 2 Hide
    AppleBlowsDonkeyBalls , September 23, 2011 4:53 PM
    beenthereWe'll see how this series of Samsung SSDs fair. The previous gen was a nightmare of problems so I don't think Samsung's validation process is any better that the rest of the SSD suppliers - which is sad when Samsung controls everything including NAND production. It's amazing that we still have SSDs NOT readt for Prime Time.


    Proof? I think you just pulled this out of your ass or from someone's that told you some story. The 470 series was VERY reliable.
  • 0 Hide
    Kamab , September 23, 2011 5:06 PM
    I've stuck with Intel and crucial drives on rigs that I had any decision on, but it's always nice to see a little competition. I expect prices will continue to drop pretty linearly over the next few years.
  • 0 Hide
    David 617 , September 23, 2011 5:21 PM
    ahh, its always refreshing to see a newer and faster SSD.
  • 0 Hide
    yurim , September 23, 2011 5:29 PM
    What is the physical height of the drive, is it 7 or 9.5 mm? I want to know if it will fit in a ThinkPad x200.
  • 0 Hide
    acku , September 23, 2011 5:51 PM
    yurimWhat is the physical height of the drive, is it 7 or 9.5 mm? I want to know if it will fit in a ThinkPad x200.


    7mm but it comes with a spacer to fit 9.5mm
  • -2 Hide
    belardo , September 23, 2011 6:53 PM
    Performance matters, but reliability over-rules that.

    Even today, I would NOT use OCZ drives on any computer. Yeah, they are generally the fastest drives on the market, but I'd rather get an intel, even an M2-X25. The return rates for ALL drives, other than intel... are bad. Samsung is worst in performances and tools. But this new drive... we'll have to see over time.
  • 0 Hide
    cmartin011 , September 23, 2011 7:20 PM
    Another two years before we meet dollar 1gb range for high performance ssd
  • 0 Hide
    ikyung , September 23, 2011 7:26 PM
    belardoPerformance matters, but reliability over-rules that.Even today, I would NOT use OCZ drives on any computer. Yeah, they are generally the fastest drives on the market, but I'd rather get an intel, even an M2-X25. The return rates for ALL drives, other than intel... are bad. Samsung is worst in performances and tools. But this new drive... we'll have to see over time.

    Really? Hmm, this is the first time I heard something negative about the 470series SSD. Everytime I read a SSD article the 470series always had good reviews on solid reliability.
  • 0 Hide
    JohnnyLucky , September 23, 2011 7:45 PM
    belardoPerformance matters, but reliability over-rules that.Even today, I would NOT use OCZ drives on any computer. Yeah, they are generally the fastest drives on the market, but I'd rather get an intel, even an M2-X25. The return rates for ALL drives, other than intel... are bad. Samsung is worst in performances and tools. But this new drive... we'll have to see over time.



    I have googled every which way and cannot find any references to any major problems or issues with the 470 series that is similar to what other brands have been going through.
  • -2 Hide
    boletus , September 23, 2011 9:03 PM
    I'll be watching the customer feedback on objective forums wrt reliability (certainly not mfgr-reported failure rates, which Tom's, and reality, have demonstrated to be useless). If these new Sammys can approach Intel's level of customer satisfaction, it will be a great step forward for SSD technology. If not, well just another pipe dream for those that value reliability over speed.
  • -2 Hide
    beenthere , September 23, 2011 9:13 PM
    All you need to do is read the actual owner reviews to know that Samsung a has had a ton of problems with their SSDs, similar to the other SSD suppliers. See Newegg, Samsung, etc. for user reports. I sure hope these folks finally invest the necessary effort to correct all of these SSD issues or I'm not buying their crap.
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