[OmniOS-discuss] Windows crashes my ZFS box

[Schweiss, Chip]

On Sun, Feb 1, 2015 at 6:21 PM, Rune Tipsmark <rt at steait.net> wrote:

> I got some major problems... when using Windows and Fibre Channel I am
> able to kill my ZFS box totally for at least 15 minutes... it simply drops
> all connections to all hosts connected via FC. This happens under load, for
> example doing backups writing to the ZFS, running IO Meter against my ZFS...
>

...

>
> Latest FW on all items, HBA, Switch etc. Monitoring shows a distributed
> load on the ports as expected using Round Robin and MPIO.
>
> This might be a shot in the dark, but the latest firmware on LSI HBAs is
known to have serious problems.  It has more to do with data corrupting, so
I'm not sure this is your cause.  Use P18 or P19, but not P20.

-Chip


>
>
> One thing that irritates me is that I don't get any more than ~80-120
> MB/sec (sync=always) throughput when writing to this LUN in Windows, where
> I get 6-700 MB/sec (sync=always) when writing from a VM on ESXi... The
> abysmal performance is a pain, but the fact that I can downright crash or
> hang my ZFS box just by running IOMeter is disturbing...
>
>
>
> Any ideas why this might happen? Seems to me like a queue problem but I
> can't really get any closer than that... maybe Windows is just crappy at
> handling Fibre Channel... however no problems against HP EVA Storage....
> same machine, same tests....
>
>
>
> br,
>
> Rune
>
>
>
>
>
>
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>
>
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