       _________________________________________________________________
       STACKER NOTE                                         STACKER NOTE
                             MOUNT ID WRITE ERROR
               (Applies to Stacker 3.0 & 3.1 for Windows & DOS)
       STAC FAX 3703  (09/20/93)
       _________________________________________________________________
                                       
                                       
       BACKGROUND
       
       If the Stacker device driver cannot successfully write the "mount
       ID" to a STACVOL file, you will get the error message "Mount ID
       Write Error."  Two situations can cause this error:
       
         I. The STACVOL file resides on a Hard Card whose driver loads
            after Stacker attempts to mount the STACVOL file.
        II. The STACVOL file resides on a drive with media errors.
            
       This document is organized into two procedures.  Complete
       Procedure I if the error occurs on a Hard Card.  Otherwise,
       complete Procedure II.
       
       
       PROCEDURE I:  HARD CARD DRIVER LOADS AFTER STACKER
       
       If the "Mount ID Write Error" occurs on a Hard Card, then
       complete the appropriate steps for your version of Stacker.
       Otherwise, complete Procedure II.
       
       +------------------HARD CARDS AND STACKER 3.0---------------------+
       |                                                                 |
       |If you use Stacker 3.0, ensure that the Hard Card device driver  |
       |loads before the Stacker device driver in the CONFIG.SYS file:   |
       |                                                                 |
       |1. Use any text editor to edit your CONFIG.SYS file.             |
       |2. If the Hard Card device driver appears after the Stacker      |
       |   device driver, move it before the Stacker device driver       |
       |   line.  Otherwise, complete Procedure II.                      |
       |3. Save the file and exit to DOS.                                |
       |4. Restart your computer.  The compressed Hard Card should       |
       |   mount properly without write protection.                      |
       +-----------------------------------------------------------------+
            
       +------------------HARD CARDS AND STACKER 3.1---------------------+
       |                                                                 |
       |If you use Stacker 3.1, it is not possible to load the Hard Card |
       |device driver before the pre-loading Stacker device driver.      |
       |Instead, you must modify your configuration files STACKER.INI and|
       |AUTOEXEC.BAT so that the Hard Card mounts in the AUTOEXEC.BAT.   |
       |                                                                 |
       |The following steps show you what to do.  In our example, drive  |
       |D: is the Hard Card.  Substitute your Hard Card's drive letter   |
       |for D: when completing these steps.                              |
       |                                                                 |
       |1. Determine the swapped drive letter for your Hard Card.  At    |
       |   the DOS prompt, type:                                         |
       |                                                                 |
       |            stacker <Enter>                                      |
       |                                                                 |
       |   It displays a drive map similar to this:                      |
       |                                                                 |
       |     Stacker drive map:                                          |
       |     Drive A: was drive A: at boot time                          |
       |     Drive B: was drive B: at boot time                          |
       |     Drive C: was drive C: at boot time [E:\STACVOL.DSK =314.7MB]|
       |     Drive D: was drive D: at boot time [F:\STACVOL.DSK = 89.4MB |
       |                                               --Write Protected]|
       |     Drive E: was drive E: at boot time                          |
       |     Drive F: was drive F: at boot time                          |
       |     Total of 1 available replaceable drive(s)                   |
       |                                                                 |
       |   The STACVOL file associated with drive D: indicates the Hard  |
       |   Card's swapped drive -- in this example it is F.  Jot down    |
       |   the swapped drive letter for your Hard Card;  you will need   |
       |   it in step 3.                                                 |
       |2. Edit the STACKER.INI file.  Editing instructions are in the   |
       |   Stacker 3.1 supplement and in the Stacker README.TXT file.    |
       |   The STACKER.INI file for our example looks like this:         |
       |                                                                 |
       |        /P=1                                                     |
       |        /DIR=C:\STACKER\                                         |
       |        C:\STACVOL.DSK,SW                                        |
       |        D:\STACVOL.DSK,SW                                        |
       |                                                                 |
       |3. Upon entering the editor, your cursor will be positioned at   |
       |   the beginning of the first line.  From this position, type:   |
       |                                                                 |
       |            /SW=DF<Enter>                                        |
       |                                                                 |
       |   Where D is the drive letter of your Hard Card and F is the    |
       |   drive with which it swaps (determined in step 1.)             |
       |4. Move your cursor to the beginning of the line                 |
       |                                                                 |
       |        D:\STACVOL.DSK,SW                                        |
       |                                                                 |
       |   where D is the drive letter of your Hard Card.  Press CTRL-K  |
       |   to delete the line, then type an * in its place.              |
       |5. Our STACKER.INI file looks like this now:                     |
       |                                                                 |
       |        /SW=DF                                                   |
       |        /P=1                                                     |
       |        /DIR=C:\STACKER\                                         |
       |        C:\STACVOL.DSK,SW                                        |
       |        *                                                        |
       |                                                                 |
       |6. Save the file by pressing CTRL-Z.                             |
       |7. Use a text editor to insert the following command into your   |
       |   AUTOEXEC.BAT file.  It should appear immediately before the   |
       |   Stacker CHECK /WP command:                                    |
       |                                                                 |
       |       C:\STACKER\STACKER D:=F:\STACVOL.DSK                      |
       |                                                                 |
       |   Where D is the drive letter of your Hard Card and F is the    |
       |   drive with which it swaps (determined in step 1.)             |
       |                                                                 |
       |8. Restart your system.  The compressed Hard Card should mount   |
       |   properly without write protection.                            |
       +-----------------------------------------------------------------+
            
       
       PROCEDURE II:  THE STACVOL FILE RESIDES ON A DRIVE WITH MEDIA
       ERRORS
       
       If you have completed Procedure I and the "Mount ID Write Error"
       persists, or if the error is occurring on a hard disk that is not
       a Hard Card, then a physical hard drive flaw is the most likely
       cause of the error.
       
       To detect and correct damaged or unreadable areas of your hard
       drive, you need to run a disk repair utility, such as Norton
       Utilities Calibrate, PC Tools DiskFix, or SpinRite.  See document
       # 3404, "Using Surface Scan Utilities with Stacker," for more
       information.
       
       Persistent errors may indicate a hardware failure in the hard
       drive controller, the drive controller cable, the motherboard, or
       the hard drive itself.  Have a qualified repair technician check
       _________________________________________________________________
       Copyright 1993, Stac Electronics                      
