David Groep wrote: > Hi, > > Plant, Dean wrote: >> Simple fix, >> >> Adaptec & CentOS = :-( >> LSI & CentOS = :-) > > Which is why after a few hours of testing I decided to indeed buy a > couple of LSI cards to test with -- far better than a lot of > frustration. > > But, meanwhile, I decided to test one more thing: just suppose that > the SCSI auto-negotiation, which worked fine before, had suddenly > given up in version 3.0 of the aic79xx driver? > > I forced the transfer rate in the Adaptec BIOS for those IDs to the > maximum that my Infortrend could support (U160) and for good measure > disabled "Disconnect" as well. Then, rebooted into 2.6.18-8.1.6&8, and > it worked: User==Goal==Curr==160.0 MB/s. > Apparently, the latest aic79xx driver V3.0 does no longer support > auto-negotiation, whereas all drivers <=1.3.11 did negotiate > correctly. > > Michael, maybe that works for you as well (unless your tapedrive > actually does do U320)? > We tested forcing the speeds as well. The tape drive worked but when stress testing we found backups over > 2TB would never complete. Dean