Date: Tue, 06 Jul 2004 22:13:05 -0600 From: Scott Long <scottl@samsco.org> To: "Michael L. Squires" <mikes@siralan.org> Cc: freebsd-scsi@freebsd.org Subject: Re: Two SCSI controllers with 4.10-STABLE? Message-ID: <40EB7851.8030506@samsco.org> In-Reply-To: <20040706211319.X4978@familysquires.net> References: <20040706211319.X4978@familysquires.net>
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Michael L. Squires wrote: > This question relates to 4.10-STABLE. > > I had to reuse the motherboard in my home server, a SM P6DGH with > onboard dual-channel SCSI, with an older P6DLH which does not have > onboard SCSI. The P6DGH had 5 SCSI drives on channel A, and 4 on channel > B. I installed two LSI/Symbios 875 SCSI controllers on the P6DLH. > There were no problems as long as all 9 drives were on one controller, > but if I tried to spread the drives across two controllers the system > would boot but fail to mount the root partition, complaining that it > couldn't be found. I replaced the two 875's with two 2940UW's - same > problem. There were no problems > detectable using the onboard diagnostics, all 9 drives were recognized > in the right places, as were the controllers. > > I know I had a P6DLH with two 2944UW's and one 2940UW, with HVD SCSI > disks on both 2944UW's, so I know it's possible - my memory is that this > was 3-STABLE. > > I know I must be missing something simple, but I don't know what it is. > The disks aren't very fast, and the load is light, so using only one > controller is not a real problem - but with 8 empty PCI slots and spare > controllers it just bothers me. > > Mike Squires Are you sure that the drives are being discovered in the correct order? You might need to re-arrange the drives on each bus or 'wire' down the order in the kernel config file. See /sys/i386/conf/LINT for details on how to do this. Scott
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