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- From: mccall@mksol.dseg.ti.com (fred j mccall 575-3539)
- Newsgroups: comp.os.msdos.misc,comp.os.msdos.apps
- Subject: Re: WARNING !!!!! MS WINDOWS 3.1 SmartDrive Problem
- Message-ID: <1992Aug17.191443.16082@mksol.dseg.ti.com>
- Date: 17 Aug 92 19:14:43 GMT
- References: <1992Aug13.040731.2286@cs.mcgill.ca> <1992Aug13.202720.22761@serval.net.wsu.edu> <1992Aug14.141659.328@csc.canterbury.ac.nz>
- Organization: Texas Instruments Inc
- Lines: 65
-
- In <1992Aug14.141659.328@csc.canterbury.ac.nz> cctr132@csc.canterbury.ac.nz (Nick FitzGerald, CSC, Uni. of Canterbury, NZ) writes:
-
- >In article <1992Aug13.202720.22761@serval.net.wsu.edu>,
- >mwoodwar@yoda.eecs.wsu.edu (woodward matthew d - CS350) writes:
- >> In article <1992Aug13.040731.2286@cs.mcgill.ca> George Mitchell (passed on)
- >> writes...
- >[George Mitchell's warning about smartdrive deleted]
- >>
- >> George is correct that this is dangerous. This, however, is neither a bug
- >> nor a problem with the Win 3.1 smartdrive program.
-
- >I agree it's not a bug - some may disagree that it's not a problem. To
- >make write-behind caching the -default- and --NOT-- clearly explain this
- >to users - many of whom will have no concept of what disk caching is,
- >let alone the potential problems of write-behind caching - is bordering
- >on negligent, IMHO.
-
- Last time I checked the docs, it WAS clearly explained. Hey, nobody
- ever explained it to me on any of the REAL computer systems I've used,
- and it's not like SMARTDRV is the first write-behind cache program for
- DOS.
-
- >
- >> The problem is PC users who don't think before they flip the switch, and
-
- >I thought you said there was no problem?
-
- This isn't a problem if you read the documentation. If you don't,
- there's no way to change the behaviour of the power switch so it will
- ask "Are you sure?" before it powers down. Are there still people who
- flip the switch within five seconds of writing to disk?
-
- [Are there still people who flip the switch at all?]
-
- >> Microsoft not trapping the warmboot vector to flush the cache before a
- >> warmboot.
-
- >This is incorrect to the best of my knowledge.
-
- Indeed it is. The cache flushes on a soft boot.
-
- >With smartdrive loaded,
- >at DOS proper - not a DOS prompt run from inside Win31 - the keyboard to
- >screen response is slower on my 386/20-8MB than on an XT/4.77, much
- >slower. I take this as evidence that smartdrive totally usurps the
- >keyboard for its own purposes - presumably to catch Ctrl/Alt/Del. Once
- >Win31 is running it can drop this practice, as Windows does the reboot
- >checking for it and presumably signals smartdrive to flush its unwritten
- >buffers should the user actually insist on rebooting.
-
- Well, I don't think your 'evidence' is correct, though. While
- SMARTDRV.EXE does check for reboot and flush the caches on it, I've
- certainly never noticed any such effect as you describe and can't
- imagine why you would see it from SMARTDRV.EXE. What happens if you
- take SmartDrive off the machine with the 'slow' keyboard?
-
- [I suspect a keyboard accelerator on the 'slow' machine to make its
- keyboard faster, so the keyboard on the 'fast' machine seems slower.]
-
-
- --
- "Insisting on perfect safety is for people who don't have the balls to live
- in the real world." -- Mary Shafer, NASA Ames Dryden
- ------------------------------------------------------------------------------
- Fred.McCall@dseg.ti.com - I don't speak for others and they don't speak for me.
-