ZBACK & ZRESTORE

		   RAM-disk backup utilities for the
		    Toshiba T-1000 with 768K card.

		        Copyright (c) 1989
	        	 Kent P. Peterson
        		All rights reserved.


ZBACK & ZRESTORE are two small utilities which use Phil Katz's 
wonderful shareware programs PKZIP & PKUNZIP to provide a fast & 
convienent way to backup & restore the the contents of the 768K 
RAM-Disk on the Toshiba T-1000. To use these utilities place 
ZBACK.BAT, ZRESTORE.BAT, & PKZIP & PKUNZIP in the root of a 3.5 inch 
floppy. For the remainder of this document I will refer to this disk 
as your ZBACK disk.

In the interest of space, I'm not distributing the PKZIP & PKUNZIP 
files, If you were able to unzip this file, I assume you already have 
Phil's programs. Please note that ZBACK & ZRESTORE were written to 
take advantage of features in version 1.01 of the PKWARE software, so 
please use version 1.01 or later.  If you use Phil's stuff on a 
regular basis, please register it with PKWARE.

To backup the T-1000 D: drive, place your ZBACK disk into the floppy 
slot, log onto A: and type ZBACK. ZBACK will then create or update a 
file called RAMDISK.ZIP on the ZBACK disk. RAMDISK.ZIP contains all 
of the files and the directory information from your RAM-disk 
compressed into a single file. The first time you run ZBACK, it will 
take a fair amount of time because it is creating the RAMDISK.ZIP 
file from scratch. Subsequent runs of ZBACK will be faster because 
only new RAM-disk files and files that have changed since the last 
ZBACK will be written to the RAMDISK.ZIP file.

To restore the contents of the D: drive from a ZBACK disk, place your 
ZBACK disk into the floppy slot, log onto A: and type ZRESTORE. 
ZRESTORE will check the contents of RAMDISK.ZIP and if any files are 
found there that either don't exist on your RAM-disk or are of a more 
recent vintage than those on your D: drive, those files will be 
copied to D:.

Now for a few caveats & tips about using ZBACK & ZRESTORE.

PKZIP will compress the contents of your RAM-disk down to a file that 
will probably be around 300K long, but because of the way PKZIP 
works, it will need about twice that much disk space for it to work. 
This means that your ZBACK disk should not be used for storing any 
files other than those required to do the ZBACK & ZRESTORE 
operations. Also note that depending on the kind of information you 
put on your RAM-disk, compression rates may vary. I have had no 
problems using ZBACK & ZRESTORE but conceivably you could have more 
data than PKZIP can squeeze onto a 720K floppy (allowing for the 
above mentioned overhead). If this is the case PKZIP will tell you so 
& you will have to come up with some other way of backing up your 
RAM-drive.

ZBACK & ZRESTORE are designed to look for & correct differences 
between the D: RAM-disk and the ZIP file. Because of this fact, it is 
best to create a separate ZBACK disk for each unique configuration of 
your RAM disk. For example for day to day operation, I have my 
RAM-disk loaded with a small editor, some DOS utilities, & other 
general tools. Some languages that I work in are real resource hogs & 
are most comfortable if they can grab all the RAM-disk for 
themselves. My solution is several ZBACK disks. First I use ZBACK to 
backup my day to day stuff to a ZBACK disk labeled ZBACK - DAY TO 
DAY. Then I use FORMAT D: to quickly clear my D: drive and ZRESTORE 
from my ZBACK - LANGUAGE disk. When I'm done programming, I ZBACK to 
my ZBACK - LANGAUGE disk, again do a FORMAT D:, and then ZRESTORE 
from my ZBACK - DAY TO DAY disk.

If you find ZBACK and ZRESTORE useful & you have not registered PKZIP 
& PKUNZIP with PKWARE, please do so. Please don't send the PK 
registration to me, I have no connection with PKWARE & they are the 
ones who deserve your money, not me. (All I did was read their manual 
& figure out how to use some of the nifty features Phil put in his 
programs.) If you've already registered PKZIP & UNZIP & think that a 
couple of tiny BAT files are worth some money then go ahead & drop a 
buck in an envelope & send it to me.
  
			Kent Peterson
			41 Greenridge Avenue
			White Plains, NY 10605
			 
I explicitly make no guarantees about ZBACK & ZRESTORE & will in no 
way be responsible for any of your hardware, software, or any of your 
data. I encourage you to make & distribute copies of these programs 
as long as this document & the copyright notices remain intact. I 
make no guarantees about updating these programs but I am interested 
in any comments regarding these programs. Comments can be directed to 
me at the above address or on Compuserve 72310,2174 or Prodigy 
KJRD18A.

					Kent Peterson
                 			9/2/89