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From: russotto@eng.umd.edu (Matthew T. Russotto)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Determining if a drive is a hard drive
Message-ID: <1990Oct4.205555.3700@eng.umd.edu>
Date: 4 Oct 90 20:55:55 GMT
References: <1219@beguine.UUCP> <20945@well.sf.ca.us>
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Organization: College of Engineering, Maryversity of Uniland, College Park
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In article <20945@well.sf.ca.us> gurgle@well.sf.ca.us (Pete Gontier) writes:
>In article <1219@beguine.UUCP> Eliot.Henry@samba.acs.unc.edu writes:
>>  I was following the discussion a month ago about determining if a drive is
>>a floppy drive. I need to figure out how to create a list of all hard drives
>>(BOTH SCSI and nonSCSI) Any help, or suggestions or sample code in C or pascal
>>would be greatly appreciated! The file manager is so confusing! Thanks again!
>
>Whew! This is a doozy. What I've done in the past is very complex. Here's a
>summary:
>
>	get the vRefNum of the volume you want to ID
>	run the VCB queue looking for that vRefNum
>	get the handle (pointer) to the volume's driver
>	get the name of the driver - it's at an offset into the driver
>	do all sorts of fun string comparisons
>		.SCSI00         Apple SCSI volume
>		.AFPTranslator  AppleShare
>		.TOPS           TOPS
Hmm.. it isn't actually that hard-- why not walk the drive queue looking
for nonejectable, writeable drives?
(Call drivestatus to see if the drive is writeable-- this will exclude CDs,
and hardware-locked hard drives)
(you won't get any remote volumes, but you can't find out what they are anyway)
--
Matthew T. Russotto	russotto@eng.umd.edu	russotto@wam.umd.edu
      .sig under construction, like the rest of this campus.