GEOM for multipath? How?

[Poul-Henning Kamp]

In message <32275093.1131627986609.JavaMail.root at vms170.mailsrvcs.net>, Sergey 
Babkin writes:
>>From: Danny Howard <dannyman at toldme.com>
>
>>Hey ... yes, I recall there being issues with the QLogic drivers ... I
>>wonder if anyone has given the mpt drivers a shot?  I was able to speak
>>with an engineer at Engenio (now owned by LSI) and she said there were
>>some issues with the QLogic dual-port cards that were interesting to
>>her, but the LSI dual-port cards behaved differently ...
>
>QLogic worked fine in multi-path configuration with UnixWare.
>I think LSI and Adaptec did too. The only trick is to make sure 
>that the IRQs of the cards are not shared between the cards or with
>any other device.

I suspect it is not the card as much as the driver, but I am not sure.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.