# [OmniOS-discuss] iscsi timeouts

Tobias Oetiker tobi at oetiker.ch
Tue Jan 21 14:24:43 UTC 2014

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    Today Dan McDonald wrote:

    >
    > On Jan 21, 2014, at 7:21 AM, Narayan Desai <narayan.desai at gmail.com> wrote:
    >
    > > We've seen problems like this when we have a SATA drive in a SAS expander that is going out to lunch. Are there any drives showing errors in iostat -En? or any drive timeout messages in the ring buffer?
    >
    > Generally speaking --> you use a SATA drive in a SAS expander at
    > your own risk.  I used to be at Nexenta, and they would not
    > support customers who deployed SATA drives on SAS expanders.
    > These days, the price delta between SAS and SATA (for enterprise)
    > is small enough to be worth it for the headaches you avoid.

    we are not using sata NOR a sas expander ...

    we have a bunch of sas drives directly attached to sas controller
    ports each ... (the ssd drives are sata but they are directly
    attached to individual sas ports too)

    we have several system setup in a similar manner, and the problem
    only manifests on this one ... but it is also the most busy of the
    bunch.

    cheers
    tobi
    >
    > Dan
    >
    >
    >

    --
    Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
    http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900

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