TRIM Functionality

Over time SSDs can get into a fairly fragmented state, with pages distributed randomly all over the LBA range. TRIM and the naturally sequential nature of much client IO can help clean this up by forcing blocks to be recycled and as a result become less fragmented. Leaving as much free space as possible on your drive helps keep performance high (20% is a good number to shoot for), but it's always good to see how bad things can get before the GC/TRIM routines have a chance to operate. As always I filled all user addressible LBAs with data, wrote enough random data to the drive to fill the spare area and then some, then ran a single HD Tach pass to visualize how slow things got:

As we showed in our enterprise results, Vector's steady state 4KB random write performance is around 33MB/s. The worst case sequential performance here is around 50MB/s, which is in line with what you'd expect. Sequential writes do improve performance, but as with most SSDs you're best operating the Vector with a bit of spare area left on the drive (in addition to what's already set aside by firmware).

TRIM and another sequential pass restore performance to normal, but it also triggers the Vector's performance mode penalty:

At 50% capacity there's an internal reorganization routine that's triggered on Vector, similar to what happens on the Vertex 4. During this time, all performance is impacted, which is why you see a sharp drop in performance just beore the 135GB mark. The re-org routine only takes a few minutes. I went back and measured sequential write performance after this test and came back with 380MB/s in Iometer. In other words, don't be startled by the graph above - it's expected behavior, it just looks bad as the drive doesn't get a chance to run its background operations in peace.

AnandTech Storage Bench 2011 - Light Workload Power Consumption
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  • wsaenotsock - Tuesday, November 27, 2012 - link

    A 5 year warranty is a pretty solid commitment on the part of a manufacturer. I don't think they would have done that if they didn't trust the stability of the hardware, so they really put their money where their mouth is.

    Other thing: is the Indilinx co-processor 'Argon' or 'Aragon'? Pic differs from your text description.
    Reply
  • alacard - Wednesday, November 28, 2012 - link

    Nah, you've got it all wrong unfortunately - they've bet the farm on this drive and if it fails they won't be around in five years to honor those warranties.

    When you've got nothing, you've got nothing to lose.
    Reply
  • Kjella - Wednesday, November 28, 2012 - link

    Well that, but I'm glad to see OCZ committing more to their drives... on my local price price check there's Agility, Colossus, Enyo, Ibis, Lightfoot, Octane, Onyx, Petrol, RevoDrive, Synapse, Vertex and Z-drive not counting numbering or variations like Vertex EX, Vertex Limitied Edition, Vertex Turbo and using a zillion different controllers and stuff. The warranty is also an indication this is the technology they'll continue working on and fixing bugs for, which is good because their attention span has been too short and spread too thin. It's better with a few models that kick ass than dozens of models that are all shoddy. Reply
  • MrSpadge - Wednesday, November 28, 2012 - link

    Some of the drives you list are several years old.. Reply
  • JonnyDough - Friday, November 30, 2012 - link

    Furthermore, the Intel 520 (which I just purchased) got dropped off the enterprise iometer 4KB random write chart. That don't make a lick-a sense! Reply
  • Hood6558 - Wednesday, November 28, 2012 - link

    alacard may be right, OCZ is sliding closer to the cliff as we speak. There's so much competition in the SSD market, someone's got to go sooner or later, and it will probably be the less diversified companies that will go first. I recently bought a Vertex 4 128 for my boot drive, and it lasted only 15 days before it disappeared and refused to be recognized in BIOS. The Crucial M4 128 that replaced it has the problem of disappearing every time the power is shut off suddenly (or with the power button after Windows hangs), but comes back after a couple of reboots and a resetting of your boot priorities. And it's regarded as one of the most reliable drives out there.
    So in order for OCZ to remain solvent, the Vector must be super reliable and stable, and absolutely must stay visible in BIOS at all times. If it's plagued by the same problems as the Vertex 4, it's time to cash out and disappear before the bankruptcy court has it's way.
    Reply
  • Sufo - Tuesday, December 04, 2012 - link

    Windows hanging? I smell problems with the user... Reply
  • djy2000 - Wednesday, July 31, 2013 - link

    That warranty doesn't cover the most important thing. The data on the drive. Reply
  • Bull Dog - Tuesday, November 27, 2012 - link

    Is that an m-SATA connector on the other side of the PCB? Reply
  • philipma1957 - Tuesday, November 27, 2012 - link

    good question if I open the case can i use this as a msata?

    a 512gb msata is very hard to find.
    Reply

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