There is also a long-standing bug in the ALi chipset used on these servers 
which ZFS tickles. I don't think a work-around for this bug was ever 
implemented, and it's still present in Solaris 10.

On Nov 13, 2009, at 11:29 AM, Richard Elling wrote:

> The Netra X1 has one ATA bus for both internal drives.
> No way to get high perf out of a snail.
> 
>  -- richard
> 
> 
> 
> On Nov 13, 2009, at 8:08 AM, Bob Friesenhahn <bfrie...@simple.dallas.tx.us> 
> wrote:
> 
>> On Fri, 13 Nov 2009, Tim Cook wrote:
>>> If it is using parallel SCSI, perhaps there is a problem with the SCSI bus 
>>> termination or a bad cable?
>>> SCSI?  Try PATA ;)
>> 
>> Is that good?  I don't recall ever selecting that option when purchasing a 
>> computer.  It seemed safer to stick with SCSI than to try exotic 
>> technologies.
>> 
>> Does PATA daisy-chain disks onto the same cable and controller?
>> 
>> If this PATA and drives are becoming overwelmed, maybe it will help to tune 
>> zfs:zfs_vdev_max_pending down to a very small value in the kernel.
>> 
>> Bob
>> --
>> Bob Friesenhahn
>> bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
>> GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
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