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Article View: comp.os.msdos.programmer
Article #1452

Re: Fast floppy writing techniques

#1452
From: Ian D. Gay
Date: Fri, 11 Sep 1992 22:36
12 lines
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famus2@DMI.USherb.CA (Projet2 Famus) writes:

>>>Hi, I was wondering if anyone has C code for fast file writing to floppies.
>>>The application that I'm writing compresses the data before writing to disk,
>>>but the bottleneck is the floppy.  I'm currently trying to optimize disk
>>>writing by using a technique similar to XCOPY, but if I had code that
>>>resembled XCOPY already written that might help me meet my deadline.
>                                                  
You didn't say what compiler you were using, or how you were doing the 
writes. I have found stream i/o (fopen() etc) to go about 3x faster to 
floppies with Turbo C, using setvbuf() to set a 4k buffer, instead of taking 
the default. I would expect the gain to be less using open() and friends.
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Message-ID: <gay.716251008@sfu.ca>
Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!destroyer!ubc-cs!newsserver.sfu.ca!sfu.ca!gay
References: <BuFK8q.71s@DMI.USherb.CA>

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Newsgroups: comp.os.msdos.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!destroyer!ubc-cs!newsserver.sfu.ca!sfu.ca!gay
From: gay@selkirk.sfu.ca (Ian D. Gay)
Subject: Re: Fast floppy writing techniques
Message-ID: <gay.716251008@sfu.ca>
Sender: news@sfu.ca
Organization: Simon Fraser University, Burnaby, B.C., Canada
References: <BuFK8q.71s@DMI.USherb.CA>
Date: Fri, 11 Sep 1992 22:36:48 GMT
Lines: 12