Most interested by your post. I am beginning to suspect that the various problems I'm seeing with a number of configurations are all ultimately down to the combination of things connected to SCSI bus zero.
F'rinstance: I could do an XPF install of 10.1 from an external Apple CD, but not from the otherwise identical internal CD. Do bear in mind that SCSI has always been temperamental. I guess you don't want to fiddle now, but you need to scrutinise every component of your internal SCSI chain for compatible settings: unique id (natch), termpower, terminated or not, etc. Sometimes, just reordering the devices on a SCSI chain will clean up the behaviour. It's a bummer. I have to say that I have built several 7500s with a standard fit of Apple CD (id3), "Fast" disk (such as 2G or 4G Fireball, or Barracuda) for System Disk X (id1), and "slow" disk (such as 1G or halfG Fireball - at end of internal cable and terminated) for System Disk 9 (id0), and never had problems with this simple config. Problems only arise when I get ambitious and add more drives, or try more sophisticated drives on internal SCSI. If I can identify a smokin' gun on SCSI, I'll post. Gerald W Wilson [EMAIL PROTECTED] wrote: >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
