DUA1:<SYS0.SYSMAINT>EHXRQ.HLP;1
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1 HELP
  EHXRQ

        This program checks the functionality of the RQDX1 disk controller
        and  associated drives  (RX50, RD51, and RD52)  by  exercising the
        drives  in a manner similar  to a typical  user load.  The default
        test section is a multi-drive disk  exerciser.   Additionally, the
        capability of  formatting  RD51  and  RD52 disk drives is provided
        via a disk formatting test section.  This is a level 3 diagnostic.

        THE DEFAULT TEST OPERATION DESTROYS USER DATA ON A DISK IF THE DISK
        IS WRITE-ENABLED WHEN THE DIAGNOSTIC IS STARTED.  WRITE PROTECT ANY
        DISKS WITH MEANINGFULL DATA ON THEM BEFORE STARTING THE  DIAGNOSTIC
        AND THE TESTING ON THAT DRIVE WILL BE LIMITED TO READ-ONLY TESTING.

1 DEVICE

        This program will run  only on  a MicroVAX I  computer and  with a
        Vax Diagnostic Supervisor  of version 6.12 or later.  This program
        is a level 3 diagnostic.

        This program will support the  following devices ONLY:

2 RD51

 Description:   RD51 fixed media disk (RQDX1)
 link:      DUa
 Generic name:  DUan
 Tested by: EHXRQ

2 RD52

 Description:   RD52 fixed media disk (RQDX1)
 link:      DUa
 Generic name:  DUan
 Tested by: EHXRQ

2 RQDX1

 Description:   RQDX1 QBUS MSCP disk controller
 link:      HUB
 Generic name:  DUa
 Additional information:
    QBUS IP register address [octal 760000-777776]<772150>
 Tested by: EHXRQ

2 RX50

 Description:   RX50 removable media disk (RQDX1)
 link:      DUa
 Generic name:  DUan
 Tested by: EHXRQ

1 REQUIREMENTS

  HARDWARE:    MicroVAX I processor with 512Kb of memory
               RQDX1 Disk Controller (M8639)
               One or more RD51, RD52, or RX50 drives

  SOFTWARE:    Vax Diagnostic Supervisor V6.12 or later

1 EVENT

  There are no user-settable event flags.

1 QUICK

  This diagnostic does not use the VDS QUICK-pass flag.

1 SUMMARY

  A summary report is generated when running the exerciser portion of
  the diagnostic.  It is output at the end of  testing or  whenever a
  user issues a VDS SUMMARY command.  No summary  report  is produced
  when the FORMATTER section is run.

  The summary report consists of a table with one line  for each disk
  drive under test.  The output looks like:

          Bytes      Bytes        Total  Soft     Hard
  Drive   Read       Written      Bytes  Errors   Errors
  -----   -----      -------      -----  ------   ------

  _DUA0   123456      245677     369133    0        0
  _DUA2   250456           0     250456    0       10     DROPPED


  The meaning of each column may be acquired by issuing a "HELP EHXRQ
  SUMMARY <topic>" command.

2 DRIVE

  This is the drive name testing was performed on.

2 BYTES_READ

  The total number of bytes of READ  or ACCESS commands  performed on
  the drive during testing.

2 BYTES_WRITTEN

  The total number of bytes of WRITE commands performed on  the drive
  during testing.  Drives  that are WRITE-PROTECTED  when the program
  is started are READ-ONLY  tested and this  column will  be zero for
  any such drives.

2 TOTAL_BYTES

  The total of the "Bytes Read" and "Bytes Written" columns.

2 SOFT_ERRORS

  The total number of WRITE errors detected by the software after re-
  reading the data written and discovering a data mismatch.

2 HARD_ERRORS

  The total number of hardware-detected errors on the drive.  Typical
  errors include drive-not-ready and/or  RQDX1-detected data  compare
  failures.  These errors are the result of the controller  returning
  a non-zero packet status in a command response or are the result of
  an operation timing out.

2 COMMENTS

  This last unlabeled column may contain the word "DROPPED" to denote
  a drive that has been dropped from testing as the  result of an ex-
  cessive number of errors detected during testing.

1 MANUAL

  All test sections should be considered manual intervention sections
  in that the user must ensure that  the appropriate media  is loaded
  into each SELECTED drive before starting the program.

  THE DEFAULT TEST OPERATION DESTROYS USER DATA ON A DISK IF THE DISK
  IS WRITE-ENABLED WHEN THE DIAGNOSTIC IS STARTED.  WRITE PROTECT ANY
  DISKS WITH MEANINGFULL DATA ON THEM BEFORE STARTING THE  DIAGNOSTIC
  AND THE TESTING ON THAT DRIVE WILL BE LIMITED TO READ-ONLY TESTING.
  

1 SECTIONS

  There are three sections provided in this diagnostic, the EXERCISER
  section, the FORMATTER section, and the DEFAULT section.

  Note  that the DEFAULT section is exactly the same as the EXERCISER
  section in this diagnostic.

2 DEFAULT

  The  DEFAULT test section is the same as the EXERCISER test section
  in this diagnostic.  Enter "HELP EHXRQ SECTIONS EXERCISER" for more
  information.

2 EXERCISER

  This  section is used  to simulate a typical I/O load on the user's
  disk drives.  All selected disk drives are subjected to a series of
  random READ, WRITE (if disk is write-enabled), and ACCESS commands.

  NOTE THAT DISKS THAT ARE WRITE-ENABLED MUST BE SCRATCH, AS ALL DATA
  ON  THEM  WILL BE DESTROYED AS THE RESULT OF THE TESTING OPERATION.
  WRITE  PROTECT ANY SENSITIVE  DISKS (INCLUDING THE DIAGNOSTIC DIST-
  RIBUTION  DISKS) ON DRIVES  THAT ARE  SELECTED BEFORE STARTING THIS
  TEST SECTION.

  Note that the EXERCISER section is also the DEFAULT section in this
  diagnostic.

  After  starting this  section, the  user  is asked to confirm write
  testing on  a disk drive for  each disk drive that is write enabled
  when  the  diagnostic is started.  Answering in the negative causes
  the test to be aborted.

2 FORMATTER

  This  test section is used to hardware-format RD51 and RD52 drives.
  Formatting  RX50 floppy  diskettes is NOT SUPPORTED.  Attempting to
  format an RX50 will result in a fatal error message being output by
  the diagnostic.

  FORMATTING A DISK DESTROYS ANY EXISTING DATA ON THE DISK.  You will
  be  asked to confirm  destroying  any existing data on the disk for
  each drive selected.

  Formatting an RD51 disk takes approximately 11 minutes.  Formatting
  an RD52 disk takes approximately 25 minutes.

1 ATTACH

  The  following  is an example  of how to ATTACH the RQDX1 and disks
  to be tested or  formatted.  The RQDX1 controller is first ATTACHED
  to the HUB and the drives to be tested or formatted are ATTACHED to
  the RQDX1.  The drives to be tested are then SELECTED and the diag-
  nostic is started.

  DS> LOAD EHXRQ                  ; load the diagnostic
  DS> ATTACH RQDX1                ; attach the RQDX1
  Device link? HUB                ; the option is linked to HUB
  Device name? DUA                ; the option is named 'DUA'
  IP? 772150                      ; the IP CSR address is 772150(8)
  DS> ATTACH RD51                 ; attach the RD51
  Device link? DUA                ; the option is linked to above RQDX1
  Device name? DUA0               ; the option is named 'DUA0'
  DS> ATTACH RX50                 ; attach the second RX50 drive
  Device link? DUA                ; the option is linked to above RQDX1
  Device name? DUA2               ; the option is named 'DUA2'
  DS> SELECT DUA0,DUA2            ; select the drives to be tested
  DS> START                       ; start the EXERCISER running
