Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1.chuqui 4/7/84; site apple.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!bellcore!decvax!decwrl!sun!idi!apple!lsr
From: lsr@apple.UUCP (Larry Rosenstein)
Newsgroups: net.micro.mac
Subject: Re: We Can Say "Disk Lost" Now!! (Re: New ROMs)
Message-ID: <5607@apple.UUCP>
Date: Wed, 22-Jan-86 18:58:54 EST
Article-I.D.: apple.5607
Posted: Wed Jan 22 18:58:54 1986
Date-Received: Fri, 24-Jan-86 21:36:03 EST
References: <1322@sdcsvax.UUCP> <1324@sdcsvax.UUCP> <2344@reed.UUCP>
Reply-To: lsr@apple.UUCP (Larry Rosenstein)
Organization: Advanced Development Group, Apple Computer
Lines: 41

In article <2344@reed.UUCP> bart@reed.UUCP (Bart Massey) writes:
>> Swapping Disks:
>> 	Option-. aborts a "Please insert disk" message.  No
>> 	guarantees that the underlying software will understand
>> 	this.
>
>     Thank goodness!!!!   The  underlying software  couldn't
>have any more trouble with this than it does now!!
>
>     But I  sure  wish Apple  had  followed their  own  user
>interface guidelines  and  made  this a  button  instead  of
><Option><.> .
...
>                                                         For
>instance, <flower><.> might have  been more reasonable as an
>abort key sequence, if  it had to be  a key sequence,  since
>this is analogous  to some  other Mac  and Lisa  things.   

This is in fact done with Command-. (not Option-.) as is the user interface
standard for aborting an operation.  The original message transcribed this
incorrectly from the Technical Note.

If you cancel a disk switch dialog, the file system call that initiated the
disk switch will get a "No Such Volume" error (-35).  

One reason for not using an explicit button is simply because it is
possible to get into serious trouble with this feature, so you would not
want to do this accidentally.  For example, if the system is trying to load
a code segment and you cancel the disk switch, there is nothing the system
can do but put up a system bomb.

In general, you should use this feature only when the requested disk does
not exist anymore (when the only other alternative is to reset anyways).
Sometimes the program might be able to recover.

-- 
Larry Rosenstein
Apple Computer

UUCP:  {voder, nsc, ios, mtxinu, dual}!apple!lsr
CSNET: lsr@Apple.CSNET