info-mac@utcsrgv.UUCP (info-mac) (06/10/84)
Date: 9 Jun 84 16:28 EDT From: David H M Spector <uw-beaver!SPECTOR@NYU-CMCL1.ARPA> To: info-mac@SUMEX-AIM.ARPA Subject: Trash Can Quirk I found an interesting aspect of the finder and the trash can last night. I have three disks on the desktop, I decided to "throw away" one of the ones I didn't need att the moment by dragging it to the trash, after a moment I thought better of it, and decided to retrieve it from the trash, when I opened the trash, it wasn't there. There was over 100Kb free, so I don't think that the finder suddenly needed the space. I thought that any object that was "the last thing thrown away" could be recovered, does this not apply to disks? David HM Spector NYU Systems Group ________________________________________. |ARPAnet: SPECTOR@NYU-CMCL1 | |USEnet : ...floyd!cmcl2!acf4!spector| | -+-+-+- | |Any opinions expressed herein are my own| |and should not be considered those of my| |employer. | ________________________________________. -------
info-mac@utcsrgv.UUCP (info-mac) (06/12/84)
Date: Sat 9 Jun 84 18:22:12-PDT From: <uw-beaver!OTHB@SRI-KL.ARPA> 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 <SPECTOR@NYU-CMCL1.ARPA>" 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 -------
info-mac@utcsrgv.UUCP (info-mac) (06/12/84)
Date: 11 Jun 84 12:31:29 PDT From: uw-beaver!wert.pa@XEROX.ARPA Subject: Re: Trash Can Quirk In-Reply-To: <1615A75D4.01CB002B.1984@CMCL1.NYU-CMCL1.ARPA> To: David H M Spector <SPECTOR@NYU-CMCL1.ARPA> Cc: info-mac@SUMEX-AIM.ARPA The disk icons on your desk are not files, therefore they do not follow the rules for throwing away files. What they represent is memory from the system heap, which is why you get "Not enough memory" errors when you have too many disk icons. When you throw disk icons away, the memory is immediately reclaimed, as it should be. It has nothing to do with the finder needing disk space. scott