DiskDupe Support Guide
The duplication speeds for diskettes copied with DiskDupe do not depend on the processor speed of the computer if the processor in the PC is a 286 or above. Copying times on XT (8086) computers will probably be slower.
The Setup menu is where you specify your computer configuration (ie: controllers, drives, disks, etc.). In most cases, you will be able to use DiskDupe right away without changing anything in the Setup menu. If you do change something, your changes will be automatically saved in the configuration file DISKDUPE.DAT, and will affect all jobs that have been created.
The easiest way to set up your computer is to go down each item in the Setup menu. For the basic setup, you would need to access Controllers, Autoloaders and Drives. Below lists a summary of the basic steps to set up your computer with DiskDupe:
These are the three types of installation that you can do. Please Note: It is not possible to run DISKDUPE.EXE from a floppy drive.
Hard Disk Install
To install DiskDupe on your hard disk:
Running DiskDupe on a network allows you to take full advantage of the multi-user environment and allows you to share image files with others on the network. As long as only one computer is using DiskDupe at a time, you can install DiskDupe on the network under terms of this license agreement. If more than one person will be using DiskDupe at once, contact us for information on site license.
If you are the only one using DiskDupe on your network, you can install it as described in the hard disk installation section. However, if you would like multiple workstations to be able to access DiskDupe, the network administrator should install it according to the following instructions.
Copy all the files from the DiskDupe disk into a shared subdirectory on the network. Run DiskDupe once from that directory to create a DISKDUPE.DAT file.
Copy the file DISKDUPE.DAT from the shared subdirectory to a local subdirectory that DiskDupe will be started from.
DiskDupe searches the current directory and the path for its configuration file DISKDUPE.DAT, which is updated with DiskDupe's current settings each time you exit. if DiskDupe cannot locate a DISKDUPE.DAT file, it creates a new one in the directory from which it was started. There are several ways to ensure that a user's configuration will be saved:
Add the local subdirectory to the user's PATH statement.
Keep Auto-set A: & B: on in the shared subdirectory. If started with the shared DISKDUPE.DAT, DiskDupe will start up with the A: and B; drives tailored to the specific workstation's configuration at the time it was turned on or rebooted. This alleviated the need for some users to have a local DISKDUPE.DAT file.
Start DiskDupe from the local subdirectory or create a batch file to do so.
If the computer doesn't have a hard disk and is not attached to a network, you can run DiskDupe off of a Ram drive provided that you have enough memory. DiskDupe can be run off of a hard disk or a Ram drive but it is not possible to run DISKDUPE.EXE off of a floppy drive.
If you only have extended memory you can use a RAM disk to run DiskDupe. Copy the DiskDupe files from the floppy to the RAM disk and run DiskDupe on the Ram disk to leave your floppy drives free for copying.
If you have the Pro edition of DiskDupe a special RAM disk called a RAMBODSK.EXE is included. If you have the Standard edition, you can use the RAMDRIVE.SYS utility included with Dos instead.
Follow the instructions below to run DiskDupe from a RAM disk.
DiskDupe uses the same technique for navigating the menus that is used in Windows, and just like Windows there are pull-down menus available across the top of the screen that allow the user to access dialog boxes for entering selections.
Note: DiskDupe requires that at least one window be open to operate. If you close all the Job windows leaving a blank desktop, you can obtain a list of jobs available by pressing [F3], or by selecting File|Open|Job from the menu bar.
Compare checks that two or more disks are identical. Duplicate makes a copy of a disk. The Copies setting controls the number of copies that are made. Enter 0 to copy continuously.
Whether you are duplicating or comparing, DiskDupe always works from the Source to the Destination. It copies from the source, sometimes called master disk, to the destination, or target, disk.
Regardless of the options chosen, DiskDupe makes an exact copy of a disk, including system and hidden files, subdirectories and volume labels. However, DiskDupe cannot make duplicates of copy protected disks.
With DiskDupe, you can either format a disk as it is being duplicated or separately. When you copy disks with Duplicate, DiskDupe will detect whether a disk has been formatted and, if necessary, format it while copying. Use Format as a separate feature whenever you want to preformat disks ahead of time for later use with DiskDupe such as making master disks or for general Dos use.
To format a disk separately:
If DiskDupe produces disks without reporting errors but some of the disks are unreadable there are several possible causes.
DiskDupe has several CRC checks built into it. Every track of the image file has a CRC, and there is a CRC for all of the tracks in the image, so you will find that if one bit of the image is changed in the data area then it will be rejected by our software ("Error 908, Image file corrupted"), so if there were a bad spot on your hard drive we would catch this.
DiskDupe also does a CRC check of its own code loaded in memory ("Error 906, Code Memory Corrupted") and a CRC check of the buffers used to store the image while transferring it to the diskette ("Error 907, Buffer Memory Corrupted").
When DiskDupe is run with "Verify" set to "Always" then every bit written to the disk is read back and compared to the original image and because of the above mentioned CRC checks it is not possible for the data to be written to the floppy with a different bit content from the image file.
Despite all of this checking it is possible for data to get corrupted when read from the floppy controller if there is a DMA problem causing a master to be read incorrectly. Running Drive Test ("Diagnostics") in DiskDupe will catch this and report either Error 205, Bad DMA, or Error 301, Bad Compare. Try running Drive Test to see if errors are reported on this machine.
If the bad disks are readable in the drive that produced them but not readable in other drives:
It the diskettes are not even readable on the drive that wrote them:
If you are getting a "205 Bad DMA" go to step 1.
If you are getting a "212 SDS Head 1 Bad DMA" go to step 4.
How to Perform a Drive Test
The DiskDupe drive test feature is an excellent method for diagnosing a setup problem.
Run DiskDupe and go to Setup|Drives menu, highlight the drive with the DMA problem, and type "T" for test.
How to Change the Bus Speed
Sometimes the bus speed of the computer may be too slow for the fast DMA rates that DiskDupe uses. Most people do not realize that the bus speed of the computer does not depend on the processor speed. A 166Mhz Pentium can still have a slow bus speed.
How to Change the DMA Channel
A DMA conflict can occur when there is a conflict between the floppy controller and some other device in the computer that is using DMA. One solution is to try changing the DMA channel that your floppy drive controller is using
How to Perform a Clean Boot
A clean boot is an excellent method for determining whether a device driver or TSR is causing a problem, since the computer is booting without them loading.
DMA Chipset Incompatibility
We have observed that with certain computers that the DMA controller, which handles DMA transfers and DMA requests, will sometimes send an additional byte of data during a block transfer. This additional byte means that the data in memory will not compare to the original data, which produces an error.
If you have tried everything, and you are still experiencing DMA problems, then the DMA chipset that is on the computer's motherboard may not be compatible with the high-speed data transfer that DiskDupe performs. Our recommendation is to try using another computer, preferably a different brand.
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