CARPENTR@SERVAX.BITNET (RALPH=CARPENTER) (12/13/89)
Ralph Carpenter (CarpentR@SerVax.Bitnet) says: >> A few months ago, we had to substitute a UniDisk 3.5 drive for >>a GS's Apple 3.5" drive which had to go to The Shop. We couldn't get >>the GS to boot from the UniDisk. We swapped drives, cards, cables, >>etc. No go. Finally, in desperation, we read the manual :-) and >>discovered that the FAST speed of the GS was TOO fast for the UniDisk >>to respond during the boot scan, so the GS never "heard" it. We set >>the GS's speed down to NORMAL (ie, POKEY) via the Control Panel and >>the UniDisk booted just fine. (It booted slow, but it booted.) Matt Deatherage (Matt@Apple.Com) replies: >This isn't true generally, although slowing down the system may have >made your specific problem go away. I boot my system from UniDisks >all the time, as do thousands of others, without resetting the system >speed to "normal". >In fact, there's a whole lot of expensive hardware in the IIgs to make >sure that the system isn't "too fast" for older peripherals. I'm glad to know it's not a widespread problem. We were completely puzzled as to why our (3rd) brand-new IIgs consistently failed to boot from any of our brand-new UniDisks until we came across this paragraph in the System 4.0 Apple IIgs Owner's Guide (030-1502-A), Chapter 6 "TroubleShooting", p. 183: "THE COMPUTER DOESN'T RECOGNIZE YOUR UNIDISK 3.5-INCH DRIVE [ ... ] o The UniDisk drive is connected to a disk drive controller card but the System Speed option in the Control Panel is set to Fast. Change the System Speed setting to Normal." Reading this, & finding that it DID solve the problem, we naturally assumed that this WAS a little-known "feature" of the IIgs/UniDisk system combination. :-) _____________________________________________________________________________ / \ | Ralph Carpenter InterNet: CarpentR%SerVax.Bitnet@MITvma.MIT.EDU | | Dept. of Psychology --->Bitnet: CarpentR@SerVax SoBell: (407) 367-2616 | | Florida Atlantic U. Bitnet: Ralpho@FauVax GEnie, Delphi: Ralpho | | at Boca Raton CI$: 74015.644@compuserve.com | \_____________________________________________________________________________/ CC : SMTP@INTERBIT CC : BONNERB@FAUVAX CC : RALPHO@FAUVAX
mattd@Apple.COM (Matt Deatherage) (12/15/89)
Ralph Carpenter (CarpentR@SerVax.Bitnet) says: > I'm glad to know it's not a widespread problem. We were >completely puzzled as to why our (3rd) brand-new IIgs consistently >failed to boot from any of our brand-new UniDisks until we came across >this paragraph in the System 4.0 Apple IIgs Owner's Guide (030-1502-A), >Chapter 6 "TroubleShooting", p. 183: > > "THE COMPUTER DOESN'T RECOGNIZE YOUR UNIDISK 3.5-INCH DRIVE > > [ ... ] > > o The UniDisk drive is connected to a disk drive controller > card but the System Speed option in the Control Panel is > set to Fast. Change the System Speed setting to Normal." > > Reading this, & finding that it DID solve the problem, we >naturally assumed that this WAS a little-known "feature" of the >IIgs/UniDisk system combination. :-) NO! DON'T DO THAT! AACCKK! [Matthew is once again mortally wounded by a misprint.] That's supposed to mean "Disk II". UniDisks are absolutely, positively, under no circumstances, supported in the IIgs *when conncted to Apple's UniDisk 3.5 Interface card.* That card is *only* for the II+ and IIe, not the IIgs. Get rid of the card and plug your UniDisks into the disk connector on the back, and turn the system back to Fast speed. If you mix UniDisks with Apple 3.5 Drives, the Apple 3.5 Drives have to be first in the chain. -- ----------------------------------------------------------------------------- Matt Deatherage, Apple Computer, Inc. | "The opinions expressed in this tome Send PERSONAL mail ONLY (please) to: | should not be construed to imply that Amer. Online: Matt DTS | Apple Computer, Inc., or any of its ThisNet: mattd@apple.com | subsidiaries, in whole or in part, ThatNet: (stuff)!ames!apple!mattd | have any opinion on any subject." Other mail by request only, please. | "So there." -----------------------------------------------------------------------------