OS/2 Driver README File          Version 1.01


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     |    IBM OS/2 2.x disk driver    |
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     PTI1S506.ADD is the driver for the IBM OS/2 2.0 and IBM OS/2 2.1.
     Please read all the information before preceding with the install.

     You will only need this driver under the following situations:

     - You want to install TURBO MODE under OS/2.
     - Your Disk Accelerator is installed as the PRIMARY disk controller
       with more than two IDE drives attached.
     - Your Disk Accelerator works as the SECONDARY disk controller.



     THIRD AND FOURTH PARTITION SETUP
	     
     IMPORTANT - Please read this section if your controller has drives
     supported on the second IDE bus connector.

     It is recommended to use only OS/2 drive partitioning utility for the 
     third and fourth HDs.  With an OS/2 partition utility, make LOGICAL 
     UNITS on these drives.  PRIMARY Partitions should be created on ONLY 
     THE FIRST TWO HDs.  These recommendations are made to avoid changing 
     the original OS/2 assigned drive order. The OS/2 error message after
     the driver is loaded in config.sys "Cannot Find COUNTRY.SYS" is a 
     symptom of this setup problem.  
     
     ALL partitions created from a DOS partition utility on the third and 
     fourth hard drives will produce this problem.

     If your PROMISE Disk Accelerator is installed as the PRIMARY 
     controller, Hard Drives D2 and D3 (i.e. the "THIRD" and "FOURTH" HDs) 
     attached to the second connector should be partitioned as LOGICAL 
     UNITS through the OS/2 partitioning.  
				    
     If your PROMISE Disk Accelerator is installed as the SECONDARY 
     controller, ALL partitions on the controller should be created as 
     LOGICAL UNITS.
     

     These are the steps to recreate existing PRIMARY partitions as LOGICAL 
     UNITS.  
  
     1. Backup the data. 
	
	Backup any necessary data stored on D2 and/or D3.   
     
     2. Delete the D2/D3 partition(s).
     
	Delete the PRIMARY partition(s) created on D2 and/or D3. From a DOS
	BOOT, use the "SIFDISK.EXE" utility from the PROMISE DOS Utility 
	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 steps under the "DRIVER INSTALLATION" below.  Boot OS/2  
	with the PTI1S506.ADD driver installed to access the third and 
	fourth physical drives.
	
     
     4. Create partitions as LOGICAL UNIT(s) on D2 and or D3.
		
	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.

	Proceed to Format the new partition(s). 
     
     6. Restore data.
			 
	Restore the backed up data onto the partition(s).
     

     DRIVER INSTALLATION
     
     Please follow the steps below for installing the driver for the PROMISE
     Disk Accelerator.

     1. Install the OS/2 driver.

	Copy PTI1S506.ADD to the OS2 directory of your system.

	Add BASEDEV = PTI1S506.ADD in the CONFIG.SYS file.
	Note: This statement must not contain either drive or path
	      informartion.

	If your mainboard CPU has a 16-bit external bus (for example, IBM
	486 SLC2), add the /W parameter to the statement.  If no parameter
	is specified, the controller will function under the default 32-bit
	data access mode.

     2. Delete the "BASEDEV = IBM1S506.ADD" device setting.

	Delete the command line "BASEDEV = IBM1S506.ADD" from the 
	CONFIG.SYS file, if it exists.

     3. Reboot the system.

   

   The following switches are available on this driver and may apply to 
   your system:
 
   /V    : Verbose - display driver information at initial time
   /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
   /T    : drive Timeout - the total allowable error recover time