From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <38EF50E4.872D76ED@w-d.org> Date: Sat, 08 Apr 2000 11:32:16 -0400 From: John Doty Reply-To: jpd@yami.w-d.org Mime-Version: 1.0 Cc: rshaw@linuxppc.org, linuxppc-dev@lists.linuxppc.org Subject: Blue & White & SCSI & Ultra 2 SCSI & Kernel > 2.2.10 -> No Disks Content-Type: text/plain; charset=iso-2022-jp; x-mac-type="54455854"; x-mac-creator="4D4F5353" Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: My Yosemite G3 (Rev 2) has *two* SCSI cards: an Adaptec 2930CU, and an Adaptec 2940U2B (Ultra 2 Wide). Last summer, my son Matt (who occasionally posts here on comp.os.linux.powerpc) set it up as a LinuxPPC machine with a 2.2.10 kernel from Robert Shaw's site. As a compute/file server, it has been great. However, attempts to upgrade to a more recent kernel invariably encountered SCSI problems. The most common symptom was an inability to mount the root filesystem. We have finally gotten partway to the bottom of this. Apparently, if the 2930 controller is present the kernel cannot find the 2940 controller (and the 2940 has the disks on it). With the 2930 pulled (I don't really need it the way I'm currently using the system), SCSI works fine with the newer kernels. Finding this took quick eyes, as the evidence scrolls off the screen before failure is obvious , but you can't do a dmesg until you're up. Matt also speculated that it had to do with the slot order of the controllers, so I switched them. That didn't help: the kernel still only found the 2930. I'm now running a Yellow Dog 1.2 system. I think the lesson to be learned here is that if your machine is loaded up with optional hardware, it might make sense to strip it down to something simpler if you encounter problems. -- John Doty "You can't confuse me, that's my job." Home: jpd@w-d.org Work: jpd@space.mit.edu ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/