cam SCSI negotiation issues (mpt in that case), only 3.300MB/s transfers

[Harald Schmalzbauer]

 schrieb Harald Schmalzbauer am 23.11.2012 14:39 (localtime):
> ...
> found out that    hint.mpt.0.msi_enable="1"
> solves the interrupt storm problem, although dmesg output still is
> exactly the same:
>     mpt0: <LSILogic 1030 Ultra4 Adapter> port 0x4000-0x40ff mem
> 0xd6440000-0xd645ffff,0xd6420000-0xd643ffff irq 18 at device 0.0 on pci3
>     mpt0: MPI Version=1.2.15.0
> Btw, I'm still curious what the sysctl "hw.mpt.0.role" means? With my
> LSI1030 it's "3", an onther 1068, it's "1"

Any hint for me what "hw.mpt.0.role" means?


> ...I had no luck using "camcontrol negotiate sa0 -R 40" to
> alter the negotiation parameters.
> It always shows 3,300MB/s and seems to reflect reality

I'd still need help here if possible.
Is there any point to start for non-developers? Any SCSI command
"secrets" I can try?
If anybody is interested in solving, but lacks hardware, I'd donate one
LSI20320IE.

Thanks,

-Harry (not subscribed to freebsd-scsi@)

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