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List:       opensolaris-storage-discuss
Subject:    Re: [storage-discuss] mpxio and 6140 flapping
From:       Bob Friesenhahn <bfriesen () simple ! dallas ! tx ! us>
Date:       2008-08-22 2:55:33
Message-ID: Pine.SOC.4.64.0808212152480.1110 () freddy ! simplesystems ! org
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On Thu, 21 Aug 2008, Stuart Anderson wrote:
>> 
>> It is a 2540 rather than a 6140.  I don't recall seeing this issue under 
>> S10U4.  For my case, since there is a volume per disk (expensive JBOD), the 
>> preferred configuration reaches six disks per fiber channel path and also 
>> via the preferred controller for those disks.  This optimum configuration 
>> allows 2-3X the performance that Sun admits to in their formal benchmark 
>> report for the 2540 (278,530KB/s write, 522,930KB/s read).
>
> There is not much difference between S10U4 patched and S10U5, do you remember 
> what patch level you had the kernel at when it was still working for you 
> prior to upgrading to U5?

It looks like it is Generic_127112-11.  There were other things which 
happened in the mean time such as three motherboard swaps and 
exporting/importing the ZFS pool.  It is also possible that the 
situation changed some time ago and I just did not notice.

Bob
======================================
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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