# [OmniOS-discuss] Status of TRIM support?

Ian Collins ian at ianshome.com
Wed May 28 22:40:14 UTC 2014

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    Saso Kiselkov wrote:
    > Hi Dan,
    >
    > First off, the Samsung 840 Pro apparently doesn't have power loss
    > protection, so DON'T use it for slog (ZIL). Use some enterprise-class
    > SSD that has proper protection of its DRAM contents. Even better, if you
    > have the cash to spend, get a ZeusRAM - these are true NVRAM devices
    > with extremely low latency.
    >
    > If you use an SSD for slog, do a secure erase on it and then partition
    > it so that you leave something like 1/3 of it unused and untouched by
    > the OS. Evidence suggests that that might dramatically improve write
    > IOPS consistency:
    > http://www.anandtech.com/show/6489/playing-with-op

    Reading there I'd say the conclusion is "leave  something like 1/3 of it
    unused and untouched unless you are using an S3700" :)

    I'm glad I am...

    --
    Ian.

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