Date: Thu, 15 Apr 2004 22:40:02 -0400 From: Don Bowman <don@sandvine.com> To: "'scsi@freebsd.org'" <scsi@freebsd.org>, "'aic7xxx@freebsd.org'" <aic7xxx@freebsd.org> Subject: freebsd, adaptec aic7902, 4 or more seagate drives == resets Message-ID: <FE045D4D9F7AED4CBFF1B3B813C85337045D8A06@mail.sandvine.com>
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has anyone successfully used 4 or more seagate [10K or 15K] U320 drives on a single scsi bus with an adaptec aic7902 controller? I have found that with the 7902 [ahd], i get repeated scsi bus resets [time outs]. With an adaptec 2200s controller [which also uses the 7902], i get the same behaviour. The other drives don't need to be active, just booting from one with the other 3 quiescent on the bus is sufficient. The error usually occurs as the os is coming up, you see the banner of SCB timed out, reset [when using AHD], or a scsi bus reset message [aac]. the 10K drive is using seagate firmware 007, the 15K is using seagate firmware 006. [as per http://www.seagate.com/support/disc/u320_firmware.html] The AAC kept resetting the bus when in its bios trying to rebuild the raid, so i'm guessing its not a driver issue. I'm sure this is not terminator, electrical, power, cable, etc., they have all been swapped, checked, etc. Multiple systems have been tried. Backplanes versus cables have been tried. --don
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