Can LSISAS1068E chip be configured as a x8 wide port?

Hi,

LSISAS1068E is a 2 ports(total 8 PHY) SAS controller with per port can be configured as a 4 PHY SAS wide port,with the usage of arbitrary one port LSISAS1068E can control a SAS expander through a MiniSASx4 to SASx4 cable,we get 4 connections simultaneously.Is it possible for LSISAS1068E to control one SAS expander through two MiniSASx4 to SASx4 cables so we can have 8 connections simultaneously(more bandwidth) if not,why?

Thanks
Wenshuang

During my experiments I tried something like that and couldn't get a wide port wider than 4 phys.

I think the reason was that each group of 4 phys has a different initiator port identifier (SAS address) seen from the expander. You could check that with smp_discover (in my smp_utils package). Or perhaps there was another reason (e.g. perhaps the expander didn't support it). It didn't work anyway.

Can LSI's SAS-2 chips do 8 (phy) wide ports?

Note: What SCSI/SAS calls a "port" and LSI's usage of that term is a bit different. For example you want two "LSI" ports to act as one SCSI port.

Doug Gilbert