Janice Best wrote: > I need to find out what kind of SCSI I have in my PM7500 (preferably without > opening it up *this* time!). The below website says "SCSI: DB-25." > > http://www.apple-history.com/7500.html > > I want to add a larger hard drive (currently have a 1Gig). I think I would > add it to the SCSI connector and that I would need to either look for a > 25-pin drive or get an adaptor. Is this right? > > If so, are there such adaptors, and how large of a drive can I get? > > Janice >
The description on Applespec is for the external SCSI connection. If you're connecting an external drive, you simply need a db25-<whatever> SCSI cable, where <whatever> is the connector on the back of that drive, usually a centronics 50. Internally, your 7500 has a 50-pin narrow SCSI connector. If the 7500 series is like the 7600 (not necessarily) the internal drive is on a SCSI II bus, menaing if nothing but SCSI II devices are on it, it's a bit faster than the external SCSI connector. There's two drive bays on the 7500's; the default drive ships in the top drive bay. You will likely need a 'drive sled'; a plastic bracket that the drive attaches to, which then slides into the case. Mine cost me $5 at my friendly local Apple dealer. How large a drive you can get is subject to your pocketbook. Narrow SCSI drives just arent' made anymore; you'll find them, used, in sizes up to about 9 GB in size. Modern SCSI drives can be had in sizes up to 181 GB, if you feel like paying $1400 for a drive to put in a computer worth approximately $100 on the used market ;-) PowerOn Computing <http://www.poweron.com> has 9G Apple-rommed SCSI 50-pin hard drives for $90, 4G for $60, and the sled for $10. You can get an ATA card like Sonnet's Tempo <http://www.sonnettech.com/product/tempo_ata100.html> and add an IDE drive, which is much cheaper for large storage; a 40 gb drive should cost around $100 or less, but you cannot use it as a boot drive. You can spend more an get a simple drop-in solution like Sonnet's Temp HD <http://www.sonnettech.com/product/tempohd.html> 2.5 inch IDE HDD and controller on a single PCI card. (Again, no booting) (Good lord, the Hard Card lives!! The last one of these I saw, I was installing it into our brand-new IBM XT clone, which should give you an idea of how long ago that was!) -- 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
