LSI SAS 9300-8e & HGST Ultrastar SSD800MM: 12 Gb/s SAS, Tested

Results: Enterprise Video Streaming Performance

Video streaming is a demanding workload within the enterprise space. Companies want more HD streams with higher bit-rates and no stuttering. A storage solution well-suited for enterprise-class video delivery has completely different capabilities than something designed for databases. At the end of the day, you're basically looking for exceptional large-block sequential write performance. You also need a high level of consistency that traditionally isn't seen from consumer SSDs. For a more in-depth analysis, take a look at page 10 of Intel SSD 910 Review: PCI Express-Based Enterprise Storage.

Once the drive is in a steady state, we write its entire capacity 100 times. We use 8 MB transfer sizes and a queue depth of four, recording timestamps for each individual write. The graph below reflects 100-point averaging, so that you can better visualize the results.

Performance is fairly consistent across the entire span of the drive. We weren't able to hit the 700 MB/s mark seen in the shorter tests, but we still sustained a healthy 660 MB/s. There were a few dips during our runs. None of them were major, though. With all of that said, it was a little surprising that the SSD800MM wasn't more consistent, especially considering its excellent random write consistency.

Threshold
Best-Case Buffer Size
Worst-Case Buffer Size
620 MB/s
19 MB
30 MB
630 MB/s20 MB83 MB
640 MB/s20 MB137 MB
650 MB/s21 MB191 MB
660 MB/s22 MB
246 MB
670 MB/s2239 MB
2550 MB

Even looking at a worst-case scenario, you only need a minimal amount of buffering to maintain 660 MB/s. It might be smart to back off of that number a bit though, since going over will cause your buffering needs to soar.

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  • slomo4sho
    Now only if this technology was viable for home builds. :( Maybe in a couple years?
  • major-error
    The performance and relative maturity of this prototype drive certainly is impressive, but this is what the enterprise space demands.
    At the consumer level though, the article takes on a completely different tone--I would be very surprised if we don't start seeing mention of PCIe4 at/before the top of the next CPU cycle (so, in 24-36 months at most.)
  • raidtarded
    Actually, Adaptec already saturated PCIe 3.0 with 6GB/s. The chart is incorrect, it doesn't take 12Gb/s to saturate the PCIe bus. Well, not for Adaptec.
  • falcompsx
    Remember when mechanical hard drives struggled to saturate their interfaces? Times sure have changed with SSD tech.
  • CaedenV
    1018945 said:
    The performance and relative maturity of this prototype drive certainly is impressive, but this is what the enterprise space demands. At the consumer level though, the article takes on a completely different tone--I would be very surprised if we don't start seeing mention of PCIe4 at/before the top of the next CPU cycle (so, in 24-36 months at most.)


    Ya, my bet is that we will not start to see SATA4 or PCIe4 until Skymont at the earliest. Considering it is looking like Broadwell may be pushed back due to 14nm die shrink issues I would bet that Skymont will have similar issues when moving to 10nm. But at least for home users you can cram 2 SSDs in RAID0 with a proper RAID card and get a little performance boost until then. I guess the only problem is that most people are going to use the onboard Intel RAID for RAID0, which will get you a killer synthetic benchmark, but in practical reality it is really just expanding your volume with very little speed benefit.
  • kj3639
    Go HGST! WOO!!!!
  • bit_user
    * wipes drool off floor *

    That's a quality review of some quality products. I like the insights shared, throughout. I especially appreciated the link to the SATA-Express paper. Thanks!

    MORE REVIEWS LIKE THIS!!
    :)
  • bit_user
    788951 said:
    Actually, Adaptec already saturated PCIe 3.0 with 6GB/s. The chart is incorrect, it doesn't take 12Gb/s to saturate the PCIe bus. Well, not for Adaptec.
    How many ports and how many lanes, though? If it's just a 8-port card, the math doesn't support that, as 6x8 = 48 Gbps, which is less than the 8 x 8 = 64 Gbps that a x8 PCIe 3.0 slot should carry.
  • raidtarded
    It is the equivalent of a nuke bomb compared to the LSI products. It has 24 Native ports.
    328798 said:
    788951 said:
    Actually, Adaptec already saturated PCIe 3.0 with 6GB/s. The chart is incorrect, it doesn't take 12Gb/s to saturate the PCIe bus. Well, not for Adaptec.
    How many ports and how many lanes, though? If it's just a 8-port card, the math doesn't support that, as 6x8 = 48 Gbps, which is less than the 8 x 8 = 64 Gbps that a x8 PCIe 3.0 slot should carry.
  • raidtarded
    It is a 24 port native raid controller. smokes the 4 ports.
  • drewriley
    328798 said:
    788951 said:
    Actually, Adaptec already saturated PCIe 3.0 with 6GB/s. The chart is incorrect, it doesn't take 12Gb/s to saturate the PCIe bus. Well, not for Adaptec.
    How many ports and how many lanes, though? If it's just a 8-port card, the math doesn't support that, as 6x8 = 48 Gbps, which is less than the 8 x 8 = 64 Gbps that a x8 PCIe 3.0 slot should carry.


    The graph is slightly misleading because it includes some assumptions. I mentioned the x8 assumption, and you found the other major one, which limits it to 8 port cards. Also, they list the SAS throughput with 8b/10b taken into account.
  • drewriley
    788951 said:
    It is a 24 port native raid controller. smokes the 4 ports.


    I personally love the Adaptec 72405, it is amazing that they can provide 24 native ports and absolutely amazing sequential performance. But, when you look at external connectivity, there isn't a ton of difference. Adaptec has a version with 16 external ports, or 16x6Gbps, which is 96Gbps. LSI has an 8 port version, which gives you 8x12Gbps, or 96Gbps. While Adaptec allows you to connect more drives without the use of expanders, LSI allows you to get better performance per drive. I really like the fact that we have two companies catering to high-end RAID that offer different solutions, which gives us, the customer, the most flexibility.
  • drewriley
    328798 said:
    * wipes drool off floor * That's a quality review of some quality products. I like the insights shared, throughout. I especially appreciated the link to the SATA-Express paper. Thanks! MORE REVIEWS LIKE THIS!! :)


    Thank you, I appreciate the feedback!