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Article #7691Question on contents of \"BootDrive\"
From: Ken Bates DTN 522-2039
Date: Tue, 14 Oct 1986 15:41
Date: Tue, 14 Oct 1986 15:41
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Does anyone know if the global location "BootDrive" (location 0x210) is really valid? If I access it on either a HD20 or a HyperDrive, the contents are 0x8023, which strikes me as a rather weird drive number. If I take this number as valid and skim through the vcb queue looking for a match, I never find it (looking for a match between BootDrive and vcbDrvNum). Booting from a floppy, BootDrive turns out to be 0xFFFF, which is even stranger. The goal of this was to find out the vRefNum of the boot drive (i.e., which drive should not be unmounted). I had planned to access BootDrive, then skim through the vcb queue looking for a match, and then using vcbVRefNum of the matching vcb entry, but since the contents of BootDrive appear to be bogus, I can't do it this way. Any suggestions on 1) why this fails and 2) how to determine the boot drive? - Ken Bates
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!caip!think!nike!ucbcad!ucbvax!decwrl!ssdevo.dec.com!bates From: bates@ssdevo.dec.com (Ken Bates DTN 522-2039) Newsgroups: net.micro.mac Subject: Question on contents of \"BootDrive\" Message-ID: <5950@decwrl.DEC.COM> Date: Tue, 14-Oct-86 11:41:05 EDT Article-I.D.: decwrl.5950 Posted: Tue Oct 14 11:41:05 1986 Date-Received: Mon, 20-Oct-86 14:52:35 EDT Sender: daemon@decwrl.DEC.COM Organization: Digital Equipment Corporation Lines: 16