Date:  Wednesday, May 3, 1995 3:45:12 PM
Author:  Apple Computer, Inc.
Subject:  LockVolª 1.6

Equipment:  Macintosh

Summary: LockVol is a Control Panel device that can be used to test 
software handling of locked volumes, local or remote.   With the use of 
System 7 and File Sharing, LockVol may come in handy for those trying to 
test their software.  LockVol displays a popup menu containing all 
volumes in use by your Mac and allows you to change the status of each 
volume from unlocked, to having a software or hardware lock.  Changes 
made in the Control Panel are immediate and remain intact until you 
change them back or re-mount the affected volume.  The status of the 
startup volume is restored after a reboot.  All other volume statusÕ are 
lost after a reboot.

Improvements for version 1.6:
¥ The status of volumes is now physically updated on disk. This allows 
the volume to be mounted/re-mounted with that state persisting. Note that 
only a 'software' locked volume can be unmounted/mounted and still remain 
'software' locked. Making a volume 'hardwared' locked will lock it but 
the setting won't persist across an unmount/mount. This is due to the 
fact that when the file system mounts a volume it gets the hardware state 
of that volume.  Since it's not really physically locked, there is no 
'hardware' locked status returned.  Note that no attempt is made to 
physically update a remote volume (shared, etc.) as it doesn't belong to 
us. Changes to remote volumes will remain local.
¥ Fixed a gray shading problem in the volume popup on 1-bit deep 
monitors.  The popup would sometimes appear inactive when the window was 
in fact, active.
¥ The TAB key now cycles your through the volumes in the volume popup.
¥ There is no extension code anymore and as such the 'Show Startup' check 
box has been removed.
¥ And finally, the code size has become even smaller.  This is in part 
due to design changes and the use of Matthew Axsom's neat cdev class that 
allowed me to build LockVol with CodeWarrior.

Requirements: LockVol works under System 6.0.5 (and up), System 7, and up 
to System 7.5.  No known problems have been reported other than the ones 
you can create yourself by locking volumes that weren't originally 
locked.

Issues:  LockVol is freeware.  Permission is granted by the author for 
personal or electronic distribution as long as no fees or charges are 
received for it. LockVol remains the copyright of dEVoN Hubbard.
Virus scan:  Disinfectant 3.6 shows no viruses in this file