Kevin Willis wrote: > I am doing some experiments on my 7500 and thought you guys could > help. > > First of all, I initialized the hard drive in drive setup. Is that > the same as reformatting in PC terms?
Yes. > Secondly, I pulled an old 160 Mb hard drive from an old Performa and > plugged it in to the extra power and IDE outlets. The computer > finally started after 8 or 10 clicks, but it would not boot even with > the OS 8.5 CD-Rom loaded. You have an SCSI ID conflict. Every device on your SCSI chain (it is not IDE) needs to have a unique ID between 0 and 7. The Mac motherboard is ID 7, the factory HDD comes as 0, and the CD-Rom comes as 3. Look closely at that 160 MB drive, there should be three sets of pins labelled either address 0,1,2 or ID0, ID1, ID2 or something like that. You need to put one or more jumpers on them to specify what the address is. ID # 0 1 2 3 4 5 6 7 J0 X X X X J1 X X X X J2 X X X X X means to put a jumper across those sets of pins. If the Performa drive has three sets marked CS, MA and SL, then it IS an IDE drive and will not work in that 7500, which has a SCSI bus, but that's unlikely considering how small it is. > How can I install both HD's, keep the contents that are on the > Performa HD, and which HD should I install the OS on? Well, if your drives are still intact after the throughly punishing tratment you've given them, I'd install the OS to the larger of the drives, on the basis that it's the faster of the two. Once you've properly set the ID stuff all the drives should be visible, and whatever is there will be there. -- Bruce Johnson University of Arizona College of Pharmacy Information Technology Group Institutions do not have opinions, merely customs -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.shtml> --> 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/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
