  DAC960P DOS Driver Documentation :
  Version 2.00
  September 21, 1994

  The users are advised to go through this README document before
  starting to use the DOS driver.


  The DAC960 DOS driver directory contains the following files :

  FILE NAME       DESCRIPTION

  IBMRAID.SYS     DOS driver for DAC960
  DACMON.EXE      Administration Utility for DAC960 under DOS
  IBMASPI  SYS    DOS ASPI driver for DAC960
  DAFCDA.SYS      DOS CD-ROM driver for DAC960
  UINSTALL        Install utility
  RAIDDOS.IDP     Data file used by UINSTALL
  MSCDEX.EXE      CD-ROM support file

  DAC960P BIOS :

  The BIOS provides access for up to 8 system drives per DAC960P, under
  DOS ver 5.0 and above. The total DOS partition size is limited to
  1024 cylinders (BIOS limit) and hence it does not make sense to have
  a system drive of more than 2048 MB, if it is used only for DOS. The
  maximum size of any DOS partition cannot be more than 1023 cylinders
  or 2046MB.



  DOS Driver :

  The BIOS on the DAC960P is usable only under the real mode of the
  operating system. In order to use the DAC960P under memory managers
  like Windows, QEMM etc., a DOS driver needs to be used. The
  DOS driver, DACDRVR.SYS supports only disk drives. The total DOS
  partition size on the DAC960P is limited to 2048 MB, even when the
  DOS driver is used.


  ASPI Driver :

  If non disk devices are connected, use the ASPI driver IBMASPI.SYS
  under DOS, to access these devices. Note that the ASPI driver works
  only WITHOUT any memory managers like Windows 3.1, QEMM  etc.
  IBMASPI.SYS works in conjunction with the DOS driver, IBMRAID.SYS.


  CDROM Driver :

  Also a CDROM driver DAFCDA.SYS is included, to allow CDROM access under
  DOS, using MSCDEX. DAFCDA.SYS works in conjunction with the
  ASPI driver, IBMASPI.SYS.


  Installation :

  If DAC960 is the only disk controller in the system, use DOS
  "fdisk" to create a DOS partition and use DOS "format c: /s "
  to high level format the DOS partition.
  Follow the instructions in the main README file in the root
  directory of this diskette.


  IBMRAID.SYS, RAIDASPI.SYS and DAFCDA.SYS should always be installed in
  real memory and never in high, expanded or extended memory.

  If using another disk controller with DAC960, make sure all the
  drivers associated with the other disk controller are loaded before
  the DAC960 DOS driver.

  This completes the installation of the DAC960 DOS driver.



  Known Bugs/Limitations :

  IBMASPI.SYS and DAFCDA.SYS should not be used in Windows 3.x, QEMM
  etc..

  None of these drivers can be loaded in upper or high memory.

  IBMASPI.SYS will behave unpredicatbly, under an "installation
  abort" condition or on a controller that has no drives connected to
  it. Do not use IBMASPI.SYS when an installation abort error is reported by
  BIOS.



  DACMON Utility :

  This is an administrative utility for the DAC960 DOS user. This
  utility can be invoked under DOS or the DOS screen of Windows. Once
  invoked by entering DACMON <CR>, it comes up with a main menu screen
  similar to the one shown below.



  _________________Disk Array Monitor V 1.00________________________
  |                                                                |
  | ______________ ___________  ___________  ____________ ________ |
  | | Select DAC | | Standby |  | Rebuild |  | Chng Dev | | Quit | |
  | |____________| |_________|  |_________|  |__________| |______| |
  |                                                                |
  | ___________________________________________                    |
  | |                                         |                    |
  | |_________________________________________|                    |
  |                                                                |
  |           ----------- Target-------->      ___System Drive___  |
  |                                            | 0> ONLN RAID-7 |  |
  |  Ch-0>    ONL     ---     ONL     ---      | 1> CRIT RAID-5 |  |
  |                                            | 2> CRIT RAID-1 |  |
  |  Ch-1>    ---     DDD     ---     ---      |                |  |
  |                                            |                |  |
  |  Ch-2>    ---     ---     STB     ---      |                |  |
  |                                            |                |  |
  |  Ch-3>    ---     ---     ---     ---      |________________|  |
  |                                                                |
  |  Ch-4>    ---     ---     ---     ONL                          |
  |                                                                |
  |                                                                |
  |     _______________<Message Log>____________________           |
  |     |                                              |           |
  |     |                                              |           |
  |     |                                              |           |
  |     |______________________________________________|           |
  |                                                                |
  |________________________________________________________DAC #1__|

               Fig 1.0 : Disk Array Monitor (Main Menu)



  Main Menu :

  The top portion of the screen lists the 5 options namely Select DAC,
  Standby, Rebuild, Chng Dev and Quit.

  The rectangular box below this displays details about the option
  currently selected.

  Below that a matrix of drives connected on various channels of the
  selected adapters are displayed. The left most column corresponds
  to SCSI ID 0 and SCSI ID is incremented for every column. The
  letters ONL, STB, DDD and --- are displayed for an Online,
  Standby, Dead and not present disk drive respectively.

  Below this is the message log box, where the description about
  the drive failures, status of standby or manual rebuilds etc.
  are displayed for the selected adapter.

  The last line displays the number of the currently selected DAC960.

  Use the left and right arrow keys to select one of the five options.
  displayed on the top of the screen. The selected option box is
  highlighted and also the box below the option box displays a
  brief description about the option. Hit the ENTER key to select the
  highlighted option.


  Select DAC :

  Once the Select DAC option is selected, a window pops up displaying
  the possible four DAC960s. Use the arrow keys to highlight the
  appropriate DAC960 that needs to be administered and hit Enter key
  to select it. The arrow keys can be used to select only a DAC960
  controller present in the system. The main menu is displayed now and
  the currently selected DAC960's number is displayed on the last line
  of the main menu.


  Standby :

  This option is used to make a drive ( that has replaced a dead drive )
  standby. Once this option is selected, the cursor jumps to the drive
  matrix area and allows the selection of the drive ( to be made standby )
  using the arrow keys. Select a drive and hit Enter to make the
  selected drive standby. The controller will try to start the drive
  and on successful starting of the drive will make the drive a
  standby drive. Note only disk drives that are not part of any pack
  can be made standby drives. Hit Escape key to return to main menu.



  Rebuild :

  This option is used to rebuild a drive that was killed ( shown as
  DDD on the matrix area ) by the DAC960. Before this option is
  invoked, the killed drive has to be replaced by a properly working
  drive. Once this option is selected, the cursor jumps to the drive
  matrix area and allows the selection of the drive (to be rebuild)
  using the arrow keys. Select a drive to be rebuild and hit Enter to
  start the rebuild. The selected drive is then started, optionally
  allowed to low level format and rebuild. While the rebuild is going
  on, the Rebuild status is graphically displayed on a horizontal bar
  for every system drive that needs to be rebuild. Also the progress
  and completion status of the rebuild is indicated in the message log
  area of the main menu. On successful completion of Rebuild, the
  drive is made Online and indicated in the matrix by words ONL.



  Chng Dev :

  This option is used to quiet a SCSI channel on the DAC960, so
  that the dead drive on that SCSI channel can be replaced online
  for rebuilding. Once this option is selected, the cursor jumps
  to the matrix area and allows selection of the channel to be
  stopped using the arrow keys. Select a channel ( where the
  dead drive needs to be replaced ) and hit Enter to stop the
  activities on the channel. At this point of time disconnect the
  power cable to the dead drive and disconnect the SCSI cable on
  the dead drive. Plug in a new good drive with the same SCSI ID,
  connect the SCSI cable and power cable to it. Press a key to
  resume the channel activities.

  Note : The channel activities will automatically be restarted in
  about 30 seconds of stopping the channel (without updating the
  screen). Hence the drive removal and replacement needs to be
  done in less than 30 seconds. The removal and replacement can also
  be done in two stages, stopping the channel before removal and
  replacement.


  Quit :

  This option is used to terminate the program.


