On Sat, Mar 29, 2003 at 10:32:37PM -0800, Dave Lee wrote: > I just had an interesting experience here tonight with my Quadra 605 and > an IBM 7200 rpm 4.2gb drive. Got it today, installed inside the Quadra, > booted up from an external CD and everything was groovy. I loaded OS 8.1 > (a full install) and went to restart and got a sad mac. I tried booting > from an external CD and got a sad mac again. Tried booting from a Disk > Tools disk and the hard drive doesn't mount! Then a 7.5 install disk says > it can't recognize a volume larger than 4gb. So I gave up, sad macs were > getting to me, so I took it out and reinstalled the 500mb Quantum Fireball > that I put in the Q605 back in 1996 (which has worked well for me since > then) and put the new 4.2gb IBM 7200 rpm drive in an external case.
It could be a termination-power issue. If there's no device supplying termination power, the drive won't work. I have a 4.3GB Seagate Barracuda, a Panasonic 4x CD-ROM drive, and a Wangtek 525MB tape drive plugged into an Apple IIGS (!); the SCSI card in that machine is modded to supply termination power. The drive doesn't even spin up when it's switched on before the computer. Once the computer is switched on, it spins up (but it doesn't finish spinning up before the SCSI card times out and the sliding apple appears). Once the drive is spun up, the three-finger salute gets it to boot. (The HD is set up with a couple of ProDOS partitions (a boot partition and a data partition for 8-bit apps) at the maximum size of 32 MB and an HFS partition that takes up the rest of the drive. It runs like a champ and has far more space than an Apple II would ever need.) Many older drives supply termination power. Newer drives often don't; I think the specs for newer SCSI standards don't allow drives to supply termination power. You might try plugging both drives in and see if your Mac will see the larger drive. If it does, you might then look into some way to put termination power on the bus. I'd think some sort of motherboard modification might be possible, but the simpler way to go might be to build a powered terminator. I've built passive terminators before; a powered terminator would be one of these with a regulated 5V supply added across the termination-power pin and a ground pin. _/_ Scott Alfter / v \ [EMAIL PROTECTED] (IIGS( http://alfter.us Top-posting! \_^_/ pkill -9 /bin/laden >What is the most annoying thing on Usenet? -- Quadlist is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> Quadlist info: <http://lowendmac.com/lists/quadlist.shtml> The FAQ: <http://macfaq.org/> --> 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/quadlist%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
