I think there may be some problems in xPostFacto's SCSI protocols in 10.2 Jaguar. On two different 7500's I had 10.2 be very flaky, crashing, drives not mounted, no CD booting, no Classic mode. Finally the lack of CD booting on original Apple hardware made me realize that the SCSI bus had some problems. Since the 7500's have two SCSI buses, I switched the internal cable to the external bus connector, and instantly all the problems disappeared.
I had a tough time getting10.2 to install. The problem was booting to the installer (the installation to HD was seamless). I had kernal panics using xPostFacto 2.2.2, .3 & .4; only having success with older 2.2.1. The panic printouts always had: SCSI IO kit not found; SCSIoldworldpatch not loaded; etc. After I switched buses, the system has been solid, Classic mode now works fine, and CD's now boot normally again. The strangest thing is that after a week not running, with no pram battery installed, and the reset pressed twice for 30 seconds a week apart, the system booted automatically into 10.2 on a drive with ID 5 instead of 9.1 on ID 0 (the default startup disk)? I was flabbergasted. Later, when I tried to boot into 9.1 by using the option key, the 9.1 boot started normally, and then it mysteriously restarted itself, and rebooted back into 10.2? I've run Disk Doctor, Disk Warrior & Techtool 3 on the drives, and I still get the same behavior. If I try rebooting on the internal bus, it's back to the same old stuff (it flashes a floppy, won't boot from the CD (floppy boot is OK), and won't mount drives). I've zapped the PRAM, reinstalled the xPostFacto extensions & boot, basically done everything. Still the internal buses on two different 7500's are severely flaky at best. I never had these problems up until the 10.2 installation. My surmise is that xPostFacto has stuck something into NVRAM that is really non-volatile and that messes up the internal SCSI in 10.2? If this isn't the case, then 7500's may have a specific problem; or mine both were simultaneously stricken? I'm happy to be rock solid now, but I read that the external bus is half the speed of the internal, so I'd really like to get back to the internal. Charles Dostale recently posted his results of tests on disk data transfers using Disk Banger from the developer CHUD group of utilities. I downloaded the current CHUD utility to try and measure my drives, and it says Disk Banger has been withdrawn from CHUD because it produced highly unreliable results with certain combinations of hardware! I used "L2 cache config." in 10.1.5, but in 10.2 I've used the PowerLogix Cache Control X program with a Newertech G/3 and the XLR8 Mach Speed Control with an XLR8 card. The new Sonnet X-Tune cache program says it fixes the System Profiler problem (in 9, 10 or both?). Has anyone tried the Sonnet cache program with non-Sonnet cards? I'd try it myself, but I'm taking a breather from system modifications right now. Thanks! Kris Tilford -- Unsupported OS X is sponsored by <http://lowendmac.com/> Support Low End Mac <http://lowendmac.com/lists/support.html> Unsupported OS X list info <http://lowendmac.com/lists/unsupported.html> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive <http://www.mail-archive.com/unsupportedosx%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
