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Received: from sloth.swcp.com (sloth.swcp.com [198.59.115.25]) by nacm.com (8.6.10/8.6.9) with ESMTP id NAA19946 for <executor@nacm.com>; Fri, 24 Nov 1995 13:57:04 -0800 Received: from iclone.UUCP (uucp@localhost) by sloth.swcp.com (8.6.9/8.6.9) with UUCP id OAA04247; Fri, 24 Nov 1995 14:57:03 -0700 Received: from beaut.ardi.com by mailhost with smtp (nextstep Smail3.1.29.0 #11) id m0tJ61w-000YcHC; Fri, 24 Nov 95 14:51 MST Received: by beaut.ardi.com (linux Smail3.1.28.1 #5) id m0tJ61v-000277C; Fri, 24 Nov 95 14:51 MST Message-Id: <m0tJ61v-000277C@beaut.ardi.com> Date: Fri, 24 Nov 95 14:51 MST From: ctm@ardi.com (Clifford T. Matthews) To: James Scott <jes23@hermes.cam.ac.uk> Cc: executor@nacm.com Subject: Re: Problems with Big hfvs In-Reply-To: <Pine.SUN.3.91.951116141901.21466A-100000@blue.csi.cam.ac.uk> References: <Pine.SUN.3.91.951116141901.21466A-100000@blue.csi.cam.ac.uk> Sender: owner-paper@nacm.com Precedence: bulk >>>>> "James" == James Scott <jes23@hermes.cam.ac.uk> writes: James> I had a problem with a big (230 Mb) hfv I made in order to James> back up my macs hard disk. It worked fine until it was James> about 190 Mb full, and then every time I copied a file to James> it a GP fault occurred. When I went back into executor, the James> copied file was corrupt, in that I couldn't move it, delete James> it or access it. Wierd things happened when I deleted the James> directory containing it. Delete gave an error of the James> Abort/Continue style, and after I had aborted it was still James> there, but when I opened it it contained its parent James> directory. After a few minutes of playing in this way, I James> had completely messed up the volume! Reading and writing to James> my 'real' 240Mb mac hard disk gave no problems. Eventually, James> I backed up by making two smaller hfvs and had no James> problems. Somewhere I have the exception tracebacks and James> error numbers, which I can send if you want, together with James> details of my machine. The most important thing we need to know is which version of Executor this happened with and what arguments you supplied to "makehfv". James> While I'm here a few points I noticed about the browser and James> the filesystem. James> 1. An apple-d key to delete a file (or even a trashcan) James> would be very handy. Selecting a file or folder and hitting the delete key (not the backspace key) will ask you if you want to delete the file or folder, then you can hit <CR> and it will be done. James> 2. The ability to select multiple folders for James> copy/move/delete operations would be good. Yes, but it won't be in Executor 2 -- we have too many other nits to work out, first. James> 3. When you copy a big folder (about 100 or more files in James> it), there is a long delay before copying starts. And if James> you're copying small files, it seems to be much slower than James> copying the equivalent amount of data in big files. On a James> mac, these operations seem to happen quite efficiently. Executor is rather paranoid about writing to the disk, so it flushes cached information more often than a real Mac does. Specifically it flushes information every time a file is closed. So lots of little files result in lots of flushes. We may change this in the future. James> I can see that all of this might not be high on your list James> of priorities, but here it is all the same! Yes, we still appreciate suggestions and feedback even when we can't immediately act on them. James> James Scott --Cliff ctm@ardi.com