Tying it All Together: SSD Performance Degradation

More spare area is better for random workloads, but desktop workloads aren’t random enough to justify setting aside more spare area to improve performance; most reviews don’t test in a used state, and more users would simply flock to lower price-per-GB drives with less spare area.

Drives that drop the most in performance from new to used state have the most to gain from the TRIM instruction. Depending on how you use your drive of course:

  % Performance Drop in Used State vs. New State
  4KB Random Write 2MB Sequential Write PCMark Vantage HDD Suite
Intel X25-E 64GB (SLC) 26.1% 5.4% 9.7%
Intel X25-M G1 160GB (MLC) 35.5% 3.8% 16.7%
Intel X25-M G2 160GB (MLC) 0.7% 2.2% 15.3%
OCZ Agility 128GB (Indilinx MLC) 44.8% 15.0% 4.4%
OCZ Summit 256GB (Samsung MLC) 72.4% 3.0% 23.6%
OCZ Vertex EX 128GB (Indilinx SLC) 60.5% 20.8% 0.8%
OCZ Vertex Turbo 128GB (Indilinx MLC) 44.0% 15.4% 4.5%
Patriot Torqx 128GB (Indilinx MLC) 44.6% 15.6% 3.5%

 

Depending on the scenario, all three controllers have a lot to gain from TRIM. Random write performance drops significantly for almost every single drive. The worst is the Samsung RBB controller, which lost over 70% of its performance between new and used states; Samsung needs TRIM.

Intel made some significant improvements going from the G1 to G2 drives, the new drive loses no performance in our random write test. This is thanks to firmware tweaks and having twice as much DRAM to track data in; the more data the Intel drive can keep track of, the better it is at organization, management and garbage collection. From a pure performance standpoint, the G2 might actually be better for server workloads than the X25-E. In terms of lifespan however, the X25-E has the G2 beat.

Only the Indilinx drives lose an appreciable amount of performance in the sequential write test, but they are the only drives to not lose any performance in the more real-world PCMark Vantage HDD suite. Although not displayed here, the overall PCMark Vantage score takes an even smaller hit on Indilinx drives. This could mean that in the real world, Indilinx drives stand to gain the least from TRIM support. This is possibly due to Indilinx using a largely static LBA mapping scheme; the only spare area is then the 6.25% outside of user space regardless of how used the drive is.

Both Samsung and Intel have a lot to gain from TRIM. Samsung’s performances goes from utterly unacceptable to reasonable (but not price justified) with TRIM. Intel’s performance goes from class-leading to more, er, class-leading.

The Instruction That Changes (almost) Everything: TRIM Used vs. New Performance: Revisited
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  • Jedi2155 - Monday, August 31, 2009 - link

    Anandtech has always been known for its in-depth analysis, you're just looking for a simple review list. I much prefer these detailed articles than just hearing the list of performance and simple recommendations that most people can write if provided the proper hardware.

    I love how Anand always writes excellent, very well detailed articles that are still SIMPLE to understand. A number of other sites may offer some similar levels of detailed but are sometimes a bit too difficult to comprehend without a background in the same field.
    Reply
  • KommisMar - Sunday, April 4, 2010 - link

    Anand,

    I read your long series of articles on SSDs today, and just wanted to say thanks for writing the most informative and interesting series of tech articles I've read in years. I've been avoiding SSDs because my first experience with one was horrible. The sustained transfer rates were no better than a traditional hard drive, and the system halting for several seconds on each random write operation was too much for me to stand.

    I was so sick of the SSD coverage that I was reading on other websites because none of them seemed to answer my biggest question, which was "Which SSD won't bring my system to a screeching halt every time it needs to write a little data?"

    Thanks for answering that question and explaining what to look for and what to avoid. It sounds like it's a good time for me to give SSDs another shot.
    Reply
  • jamesy - Thursday, April 22, 2010 - link

    That about sums it up: disappointment. Although this was a top-caliber SSD article, like i have come to love and expect out of anand, this article didn't make my buying decision any easier as all. In fact, it might have made it more complicated.

    I understand Intel, Indillinx, and Sandforce are good, but there are so many drives out there, and most suck. This article was amazing by most standards but the headline should be changed: removing the "Choosing the Best SSD."

    Maybe "Choosing the right controller before sorting through a hundred drives" would be an appropriate replacement.

    Do i still go with the intel 160 X-25m G2?
    Do I get the addon Sata 6g card and get the C300?
    Do i save the money, and get an indillinx drive? Is the extra money worth the Intel/C300 drive?

    These are the main questions enthusiasts have, and while this article contained a great overview of the market in Q3 2009, SSD Tech has progressed dramatically. Only now, i think, are we getting to the point that we could publish a buying guide and have it last a few months.

    I trust Anandtech, i just wish they would flat-out make a buying guide, assign points in different categories (points for sequential read/write, points for random read/write, points for real-life performance or perceived performance, points for reliability, and points for price.). Take all of these points, add em up, and make a table pls.

    A few graphs can help, but the 200 included in each article is overwhelming, and does nothing to de-complicate or make me confindent in my purchase.

    It's great to know how drives score, how they perform. But it's even important to know that you bought the right drive.
    Reply
  • mudslinger - Monday, June 28, 2010 - link

    This article is dated 8/30/2009!!!!
    It’s ancient history
    Since then newer, faster SSD’s have been introduced to the market.
    And their firmware have all been updated to address known past issues.
    This article is completely irrelevant and should be taken down or updated.
    I’m constantly amazed at how old trash info is left lingering about the web for search engines like Google to find. Just because Google lists an article doesn’t make it legit.
    Reply
  • cklein - Monday, July 12, 2010 - link

    Actually I am trying to find a reason to use SSD.
    1. Server Environment
    No matter it's a webserver or a SQL server, I don't see a way we can use SSD. My SERVER comes with plenty of RAM 32G or 64G. The OS/start a little bit slow, but it's OK, since it never stop after it's started. And everything is loaded into RAM, no page file usage is needed. So, really why do we need SSD here to boost the OS start time or application start time?
    For SQL server database, that's even worse. Let's say I have a 10GB SQL server database, and it grows to 50GB after a year. Can you image how many random writes, updates between the process? I am not quite sure this will wear off the SSD really quick.

    2. For desktop / laptop, I can probably say, install the OS and applications on SSD, and leave everything on other drives? And even create page file on other drives? As I feel SSD is only good for readonly access. For frequent write, it may wear off pretty quick? I am doing development, I am not even sure I should save source code on SSD, as it compiles, builds, I am sure it writes a lot to SSD.

    So over all, I don't see it fits in Server environment, but for desktop/laptop, maybe? even so, it's limited?

    someone correct me if I am wrong?
    Reply
  • TCQU - Thursday, July 29, 2010 - link

    Hi people

    I'm up for getting a new Macbook pro with ssd.
    BUT i heard somthing about, that the 128gb ssd, for apples machines, was made by samsung. I was ready to buy it, but now that i've heard that first of all "apples" ssd's is much slower that they others on the marked. Then i read this. So now i'm really confused.
    What shoud i do?
    buy apples macbook pro with 128gb ssd
    or should i buy it without and replace it with an other ssd? thoughts? plzz help me out
    thanks
    Thomas
    Reply
  • TCQU - Thursday, July 29, 2010 - link

    Hi people

    I'm up for getting a new Macbook pro with ssd.
    BUT i heard somthing about, that the 128gb ssd, for apples machines, was made by samsung. I was ready to buy it, but now that i've heard that first of all "apples" ssd's is much slower that they others on the marked. Then i read this. So now i'm really confused.
    What shoud i do?
    buy apples macbook pro with 128gb ssd
    or should i buy it without and replace it with an other ssd? thoughts? plzz help me out
    thanks
    Thomas
    Reply
  • marraco - Friday, August 13, 2010 - link

    Why Sandforce controllers are ignored?

    I’m extremely disappointed with the compiler benchmark. Please test .NET (With lot of classes source files and dependencies). It seems like nothing speeds up compilation. No CPU, no memory, no SSD. It makes nonsense.
    Reply
  • sylvm - Thursday, October 7, 2010 - link

    I found this article of very good quality.

    I was looking for a similar article about express card SSDs using PCIe port, but found nothing about their performance for rewrite.
    The best I found is this review http://www.pro-clockers.com/storage/192-wintec-fil... saying nothing about it.

    Expresscard SSDs would allow good speed improvement/price compromise : buying a relatively small and cheap one for OS and softwares, while keeping the HDD for data.

    Has anyone some info about it ?

    Best regards,

    Sylvain
    Reply
  • paulgj - Saturday, October 9, 2010 - link

    Well I was curious about the flash in my Agility 60GB so I opened it up and noted a different Intel part number - mine consisted of 8 x 29F64G08CAMDB chips whereas the pic above shows the 29F64G08FAMCI. I wonder what the difference is?

    -Paul
    Reply

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