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From: info-mac@utcsrgv.UUCP (info-mac)
Newsgroups: ont.micro.mac
Subject: Re: Trash Can Quirk
Message-ID: <4526@utcsrgv.UUCP>
Date: Tue, 12-Jun-84 03:35:52 EDT
Article-I.D.: utcsrgv.4526
Posted: Tue Jun 12 03:35:52 1984
Date-Received: Tue, 12-Jun-84 04:24:46 EDT
Sender: peterr@utcsrgv.UUCP
Organization: CSRG, University of Toronto
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Date: Sat 9 Jun 84 18:22:12-PDT
From: 
Subject: Re: Trash Can Quirk
To: SPECTOR@NYU-CMCL1.ARPA
Cc: info-mac@SUMEX-AIM.ARPA
In-Reply-To: Message from "David H M Spector " of Sat 9 Jun 84 16:28:00-PDT

	I don't recall that the ability to throw away a disk icon is a documented feature, but it appears to work like this:  When you insert a new disk, all 
directory information is read into RAM.  You have probably noticed that 
sometimes the Mac runs out of memory and tells you it is throwing out one
or more disks.  When you throw away a disk icon, you are merely freeing the
RAM that was holding the disk's directory.  Since the disk still has a (?)
faithful copy of it's directory, you can read it back in if desired, and
there is therefore no need to allow you to take it back out of the trash
(except, perhaps, for consistancy...).
	Which reminds me, there were some bugs in the old version of the
finder (haven't checked the new one yet) related to throwing disks away.
You could modify the INFO entry for a file on a disk that is not in the
drive at that time, throw away the disk icon, and never have the INFO
recorded.  In this case, the finder should ask you to reinsert that disk
before allowing you to throw it away or only let you change INFO entries
on the currently inserted disk.
						-Jon Spear
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