Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!aplcen!haven!adm!smoke!gwyn From: gwyn@smoke.BRL.MIL (Doug Gwyn) Newsgroups: comp.sys.apple2 Subject: Re: Apple Profile hard drive Keywords: Apple ProFile Hard Drive GS Message-ID: <13116@smoke.BRL.MIL> Date: 14 Jun 90 19:10:41 GMT References: <13108@smoke.BRL.MIL> <862@kluge.fiu.edu> Organization: U.S. Army Ballistic Research Laboratory, APG, MD. Lines: 17 In article <862@kluge.fiu.edu> carpentr@serss0.fiu.edu (Ralph P Carpenter) writes: > The Interface Card must have ROM Rev. B (1984) and needs a >particular jumper installed on the back (anti-IC) side. Oops, I had forgotten to mention that. The jumper is just to provide a good ground path, but it is needed to improve the noise immunity. > ProFiles need some extra warmup time first thing in the >morning, so expect to have to turn yours on about five minutes before >you power the CPU. While this might be useful, I never had any warmup problems with my 5MB ProFILE. However, when you power on the ProFILE its internal controller does take something like 90 seconds to scan the disk for bad blocks and remap them, at least I assume that's what it's doing. The ready light blinks until that process is complete, at which time it begins to glow steadily.