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From: time@ice.com (Tim Endres)
Newsgroups: comp.sys.mac.programmer
Subject: Re: trapping for floppy disk
Message-ID: <1CE00001.bcochit@tbomb.ice.com>
Date: 25 Mar 91 04:10:49 GMT
Reply-To: time@ice.com
Organization: ICE Engineering, Inc.
Lines: 21
X-Mailer: uAccess - Mac Release: 1.1.0b


In article <6761@rex.cs.tulane.edu>, mandel@vax.anes.tulane.edu (Jeff E Mandel MD MS) writes:
> >I am working on an init that traps on MountVol.  What I want to do
> >is to distinguish between floppies and hard disks.  Can anybody help 
> >me out?  Sample code would be appreciated.  Thanks in advance.
> >
> I had to figure this out once, and I seem to recall deciphering it from the
> Volume Control Block's vcbDrvNum field. I believe (but it may ONLY be a belief)
> that this was always 1 or 2 for floppies. In any event, if you have to be
> absolutely safe, you can walk the Drive Queue and check the flag bytes of the
> Drive Queue Element for that drive number; byte 1 will tell you if the volume
> is ejectable. See Inside Mac Vol IV pp 176-182 for confusion in greater depth.

And won't the driver's Status call { PBStatus(drvStsCode) } give you
the same information?

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