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Article #421

Re: Virtual disk make a nice test device

#421
From: Brian J. Schenkenberger VAXman
Date: Mon, 09 Nov 1992 12:51
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>Glenn Everhart's VDDRIVER allows you to create "disk" devices with contiguous
>files.  Virtual disks come in handy for all sorts of testing.  They make good
>test devices for new versions of BACKUP, VERIFY etc.

Yes!  I have a DECUS copy of VDDRIVER and used to use it until my disk space
bacame  'limited'.  Therefore, there were very limited chunks of contiguous
space left to make the VD disk container file.  That problem went away recently
when I acquired another broken XT2190 with a drive motor. (FOC) Reworked the
motor and now I have Plenty o' free disks space! ...for a while anyway... ;-)
The RX23 was also a free-b.  So, I figured that this was as good a time as any
to put it through the ropes.

Also,  the pseudodisk (PDA0) could be used for test cases with code munging
file and volume structures.  For those that may not know how:  Simply connect
the driver with SYSGEN and then peruse the STABACKIT.COM file for the little
macro ditty to configure/size the pseudodrive.

The real issue here -- don't play around on disks with valued data.  _IF_ you
must, be sure your backups are good and current!!!

BJS-
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Newsgroups: vmsnet.internals
Subject: Re: Virtual disk make a nice test device
Message-ID: <01GQXX4WK1J496VX3T@MONMOUTH-etdl1.Army.MIL>
From: "Brian J. Schenkenberger, VAXman"
Date: Mon, 9 Nov 1992 08:51 EDT
Organization: Macro32<==>Vmsnet.Internals Gateway
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