[OmniOS-discuss] iSCSI traffic suddenly comes to a halt and then resumes

[mir at miras.org]

On 2015-05-05 09:46, Matej Zerovnik wrote:
> 
> We still kept our SATA hard drives in Supermicro JBOD with SAS
> expander and SATA drives.
> 
Your problem boils down to using SATA disks in a SAS expander. Search 
omnios user list and you will find numerous proofs that using SATA disks 
in a SAS expander causes weird behaviors and instability.

The fact is that SATA disks is unsupported in a SAS expander due to 
incompatibility between command sets in SAS and SATA. As an example SATA 
NCQ is not passed through the SAS expander which might could be the 
cause of your strange iSCSI disconnects experienced on the client side.

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