AnandTech Storage Bench - The Destroyer

The Destroyer is an extremely long test replicating the access patterns of very IO-intensive desktop usage. A detailed breakdown can be found in this article. Like real-world usage, the drives do get the occasional break that allows for some background garbage collection and flushing caches, but those idle times are limited to 25ms so that it doesn't take all week to run the test. These AnandTech Storage Bench (ATSB) tests do not involve running the actual applications that generated the workloads, so the scores are relatively insensitive to changes in CPU performance and RAM from our new testbed, but the jump to a newer version of Windows and the newer storage drivers can have an impact.

We quantify performance on this test by reporting the drive's average data throughput, the average latency of the I/O operations, and the total energy used by the drive over the course of the test.

ATSB - The Destroyer (Data Rate)

The Intel SSD 660p manages an average data rate on The Destroyer that is only slightly slower than the Crucial MX500 mainstream SATA SSD and the Kingston A1000 entry-level NVMe SSD. It's a step up from the performance of the 512GB Intel SSD 600p, and more than three times faster than the DRAMless Toshiba RC100.

ATSB - The Destroyer (Average Latency)ATSB - The Destroyer (99th Percentile Latency)

The average and 99th percentile latency scores for the Intel SSD 660p are quite poor by NVMe standards and significantly worse than the Crucial MX500, but the latency isn't completely out of control like it is for the Toshiba RC100.

ATSB - The Destroyer (Average Read Latency)ATSB - The Destroyer (Average Write Latency)

The average read latency from the 660p during The Destroyer is comparable to other low-end NVMe SSDs and better than the 600p or Crucial MX500. The average write latency is more than twice that of the MX500 but lower than the 600p and RC100.

ATSB - The Destroyer (99th Percentile Read Latency)ATSB - The Destroyer (99th Percentile Write Latency)

The 99th percentile read latency from the Intel SSD 660p on The Destroyer is significantly worse than any other NVMe SSD or the Crucial MX500 SATA SSD, but the 99th percentile write latency is an improvement over the 600p and does not show the extreme outliers that the Toshiba RC100 suffers from.

ATSB - The Destroyer (Power)

The energy usage of the 660p during The Destroyer is a bit better than average for NVMe SSDs, though still quite a bit higher than is typical for SATA SSDs. The 660p is less power hungry than most NVMe drives and slower, but not enough to drag out the test for so long that the power advantage disappears.

Introduction AnandTech Storage Bench - Heavy
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  • limitedaccess - Tuesday, August 07, 2018 - link

    SSD reviewers need to look into testing data retention and related performance loss. Write endurance is misleading. Reply
  • Ryan Smith - Tuesday, August 07, 2018 - link

    It's definitely a trust-but-verify situation, and is something we're going to be looking into for the 660p and other early QLC drives.

    Besides the fact that we only had limited hands-on time with this drive ahead of the embargo and FMS, it's going to take a long time to test the drive's longevity. Even with 24/7 writing, with a sustained 100MB/sec write rate you're looking at only around 8TB written/day. Which means you're looking at weeks or months to exhaust the smallest drive.
    Reply
  • npz - Tuesday, August 07, 2018 - link

    In additoin to durability from DWPD, I'd also like to see retention tests, both cold storage verification and any performance impact, and when fresh and after the drive has been filled several times.
    It's definitely a long term endeavor like you said though.

    Then again, it took a while after the drive was released for Samsung to discover the retentation / charge leakage on old cells (requiring more ECC). But their solution, and basically everyone's solution, to periodically rewrite old cells at the expense of some endurance only works with the drive constantly powered on.
    Reply
  • npz - Tuesday, August 07, 2018 - link

    ^ referring to the 840 Reply
  • smilingcrow - Tuesday, August 07, 2018 - link

    and 840 Evo; but not the 80 Pro which was MLC. Reply
  • mapesdhs - Wednesday, August 08, 2018 - link

    840 Pro is still a really good SSD, I try to bag them used when I can. Remember this?

    https://techreport.com/review/27062/the-ssd-endura...

    The whole move to cheaper flash with less endurance is a shame in a way.
    Reply
  • Valantar - Wednesday, August 08, 2018 - link

    Why, if the endurance was never utilized to begin with? All TR showed with that was that consumer MLC SSDs had something resembling enterprise-grade endurance. If cutting that to something more in line with actual use also reduces costs noticeably, what does it matter? As long as endurance doesn't actually go to or below normal usage patterns, it won't make an iota of difference. The reduced write speeds are more of an issue, but also alleviated by the ever-larger SLC caches on these larger drives. Reply
  • Oxford Guy - Tuesday, August 07, 2018 - link

    Their kludge.

    Solution implies that the problem was truly fixed.
    Reply
  • eastcoast_pete - Tuesday, August 07, 2018 - link

    Hi Ryan and Billie,

    I second the questions by limitedaccess and npz, also on data retention in cold storage. Now, about Ryan's answer: I don't expect you guys to be able to torture every drive for months on end until it dies, but, is there any way to first test the drive, then run continuous writes/rewrites for seven days non-stop, and then re-do some core tests to see if there are any signs or even hints of deterioration? The issue I have with most tests is that they are all done on virgin drives with zero hours on them, which is a best-case scenario. Any decent drive should be good as new after only 7 days (168 hours) of intensive read/write stress. If it's still as good as when you first tested it, I believe that would bode well for possible longevity. Conversely, if any drive shows even mild deterioration after only a week of intense use, I'd really like to know, so I can stay away.
    Any chance for that or something similar?
    Reply
  • JoeyJoJo123 - Tuesday, August 07, 2018 - link

    >and then re-do some core tests to see if there are any signs or even hints of deterioration?
    That's not how solid state devices work. They're either working or they're not. And even if they're dead, that's not to say anything that it was indeed the nand flash that deteriorated beyond repair, it could've been the controller or even the port the SSD was connected that got hosed.

    Literally testing a single drive says absolutely nothing at all about the expected lifespan of your single drive. This is why mass aggregate reliability ratings from people like Backblaze is important. They buy enough bulk drives that they can actually average out the failure rates and get reasonable real world reliability numbers of the the drives used in hot and vibration-prone server rack environments.

    Anandtech could test one drive and say "Well it worked when we first plugged it in, and when we rebooted, the review sample we got no longer worked. I guess it was a bad sample" or "Well, we stress tested it for 4 weeks under a constant mixed read/write load, and the SMART readings show that everything is absolutely perfect, we can extrapolate that no drive of this particular series will never _ever_ fail for any reason whatsoever until the heat death of the universe". Either way, both are completely anecdotal evidence, neither can have any real conclusive evidence found due to the sample size of ONE drive, and does nothing but possibly kill the storage drive off prematurely for the sake of idiots salivating over elusive real world endurance rating numbers when in reality IT REALLY DOESN'T MATTER TO YOU.

    Are you a standard home consumer? Yes.
    And you're considering purchasing this drive that's designed and marketed towards home consumers (ie: this is not a data center priced or marketed product)?: Yes.
    Are you using it under normal home consumer workloads (ie: you're not reading/writing hundreds of MB/s 24/7 for years on end)? Yes.

    Then you have nothing to worry about. If the drive dies, then you call up/email the manufacturer and get warranty replacement for your drive. And chances are, your drives will likely be useless due to ever faster and more spacious storage options in the future than they will fail. I got a basically worthless 80GB SATA 2 (near first gen) SSD that's neither fast enough to really use as a boot drive nor spacious enough to be used anywhere else. If anything the NAND on that early model should be dead, but it's not, and chances are the endurance ratings are highly pessimistic of their actual death as seen in the ARS Technica report where Lee Hutchinson stressed SSDs 24/7 for ~18 months before they died.
    Reply

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