OS/2 README FILE

  BEFORE INSTALLING THE DRIVERS OR MAKING ANY CHANGES; TURN OFF THE 
  CACHE ON THE PROMISE CACHING CONTROLLER.  FAILURE TO DO SO CAN RESULT 
  IN INCOMPLETE INSTALLATION.

  BEFORE LEAVING OS/2 EACH TIME BACK UP THE FOLLOWING 3 FILES:
  1: CONFIG.SYS
  2: OS2.INI
  3: OS2SYS.INI

  You will need this driver to provide the following:

  1. 32-bit access and block transfer mode
  2. support for the Promise caching controller as the PRIMARY control-
     ler with more than two hard drives attached
  3. support for the Promise caching controller as the SECONDARY 
     controller (except DC420)

  RECOMMENDED PARTITION SETUP

  PRIMARY partitions should be created on ONLY THE FIRST TWO HARD 
  DRIVES. These recommendations are made to avoid changing the original 
  OS/2 assigned drive order.  The error message "Can Not Find COUNTRY.SYS" 
  is a symptom of this setup problem.

  If your Promise caching controller is installed as the PRIMARY con-
  troller, hard drives D2 and D3(the third and fourth hard drives) attach-
  ed to the second connector should be partitioned as LOGICAL UNITS in 
  order to maintain uniform drive lettering between OS/2 and DOS.

  If your Promise caching controller is installed as the SECONDARY 
  controller, ALL hard drive partitions on the controller should be 
  created as LOGICAL UNITS.

  Following are the steps to recreate PRIMARY partitions as LOGICAL 
  UNITS.

  1. Back up all necessary data stored on D2 and D3

  2. Delete the selected PRIMARY partition(s)
     (You can use the SIFDISK.EXE utility on this diskette to accomplish
     this)

     WARNING: DELETING PARTITIONS WILL DESTROY DATA.  BE CAREFUL TO 
              SELECT THE CORRECT DRIVE PARTITION(S) YOU WISH TO DELETE.

  3. Install the PTI1S506.ADD driver in OS/2
     (follow the steps under "DRIVER INSTALLATION" below)

  4. Create the partitions as LOGICAL UNIT(S)

     Open the "Drives" folder in the OS/2 desktop and run the FIXED DISK
     UTILITY.  Partition the drive(s) as LOGICAL.

  5. Format the partitions

  6. Restore the data

  DRIVER INSTALLATION

  Please follow the steps below in installing the drives for the Promise 
  caching controller.

  1. Copy PTI1S506.ADD to the OS/2 directory of your system. For 
     example, if the OS/2 is in drive C, copy the driver to C:\OS2.

  2. Add BASEDEV=PTI1S506.ADD to your Config.SYS file using a text 
     editor (this statement must not have either a drive or a path 
     specified)

     If your motherboard CPU has a 16-bit external bus (for example the 
     IBM 486 SLC2), change this statement to:

     BASEDEV=PTI1S506.ADD/W

     Certain motherboard CPUs have a 16-bit external bus and require 
     this setting.  If no parameter is specified, the controller will 
     function under the default 32-bit data access mode.

  3. Delete the line "BASEDEV=IBM1S506.ADD" from the CONFIG.SYS

  4. Save the setting and REBOOT the system

  To install the Promise caching controller as a SECONDARY disk 
  controller, refer to the Users Manual that came with the Promise 
  caching controller under SECONDARY CONTROLLER INSTALLATION first. 
  If you have already loaded the OS/2 drivers for the Promise caching 
  controller and made the changes in the CSU then the Promise caching 
  controller is ready to act as a SECONDARY controller.

  Notice:
  Please don't use the Promise caching controller with Drive0 and 
  Drive2/Drive3 but no Drive1 for OS/2 (in other words, a single drive 
  with no slave on the first connector and then 1 or 2 drives on the 
  second connector), because the PTI1S506.ADD does not support this 
  condition.

  The following switches are available on this driver and may apply to your
  system:

  /V :Verbose - display driver information at bootup
  /A :Adapter Index - the ordering of adapters
  /I :Ignore Adapter - driver will not initialize the adapter indicated
  /<!>R :Reset Adapter - enable or disable reset
  /<!>DM :DASD Manager Support - enable or disable IBM-supplied DASD 
      device manager
  /U :Unit Number - the fixed disk drive number
  /T :Drive Timeout - the total allowable error recover time
  /W :16-bit data transfer(for DC4030VL-2/EIDE4030Plus only)


     ***** If You Have A CD-ROM On a Secondary IDE Controller *****

  (Note: You cannot attach CD-ROMs to Promise caching controllers. You 
         must use a non-cached secondary IDE controller for such
         devices)

  If you have an ATAPI CD-ROM attached to a secondary IDE controller, 
  you will also need to use IBM1S506.ADD to support the CD-ROM. The 
  CONFIG.SYS should look like this -


	   	BASEDEV=PTI1S506.ADD /A:1 /I
           	BASEDEV=IBM1S506.ADD /A:0 /I

  This would be in addition to any other switches you are using. These 
  switches tell the PTI1S506 driver to Ignore the secondary adapter 
  (A:1) and only control the primary adapter, and tells the IBM1S506 
  driver to Ignore the primary adapter (A:0) and only control the 
  secondary adapter.