Article View: comp.os.msdos.programmer
Article #6707Re: Discovering DOS 4 Disk Space?
From: DJ Delorie
Date: Mon, 20 May 1991 13:27
Date: Mon, 20 May 1991 13:27
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1086 bytes
In article <1991May9.180001.48119@ccvax.ucd.ie>, h235_131@ccvax.ucd.ie writes: > Sorry if this is a FAQ, but can someone tell me how to check disk-space > on *big* DOS partitions (ie 32-bit under DOS >=V4.0)? > I know about INT 21h fn's 1Bh, 1Ch & 36h but they all return the # of > available clusters as a 16-bit number - did Microsoft limit the # of > clusters to 64K? This function works properly, and yes, there is a 64K limit to the number of clusters. However, the clusters can get *huge*. Use this function, but cast to 32-bit values *before* multiplying them together, and you'll get a correct result. DJ dj@ctron.com
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!samsung!balrog!ctron.com From: dj@ctron.com (DJ Delorie) Newsgroups: comp.os.msdos.programmer Subject: Re: Discovering DOS 4 Disk Space? Message-ID: <1509@balrog.ctron.com> Date: 20 May 91 13:27:31 GMT References: <1991May9.180001.48119@ccvax.ucd.ie> Sender: news@balrog.ctron.com Reply-To: dj@ctron.com Organization: None whatsoever Lines: 16 Nntp-Posting-Host: bragi