Qualifiers

/BAD_BLOCKS
 /BAD_BLOCKS[=LIST]

  Adds the specified bad blocks to the detected bad block file
  (DBBF). If the /BAD_BLOCK qualifier is specified along with the
  /EXERCISE qualifier, the medium is tested once the bad blocks are
  added to the DBBF.

  If you do not specify a value for the /BAD_BLOCK qualifier, you are
  prompted as follows:

       BAD_BLOCKS =

  In prompt mode, BAD reports any duplicate bad blocks.


  Qualifier Value

  List

       Specifies the bad block locations to be added to the DBBF. Valid
       codes for specifying bad block locations are:

       Code                  Meaning

       LBN                   Specifies the logical block number (LBN)
                             of a single bad block.

       LBN:count             Specifies a range of contiguous bad blocks  
                             starting at the logical block number (LBN) 
                             and continuing for "count" blocks.

       SEC.TRK.CYL           Specifies the physical disk address (sector, 
                             track, and cylinder) of a single bad 
                             sector. This code is valid only for last
                             track devices.
                             
       SEC.TRK.CYL:count     Specifies a range of bad sectors starting
                             at the specified physical disk address
                             (sector, track, and cylinder) and 
                             continuing for "count" sectors. This code 
                             is valid only for last track devices.

                             You can specify these formats in any
                             integer combination or radix combination.

                                  Note

          The term "block" denotes a standard unit of 512
          bytes, whereas the term "sector" denotes the
          physical size of the device sector, which is not
          always the same for all devices. For example, an
          RL02 has a sector size of 256 bytes, while an RK07
          has a standard sector size of 512 bytes.

/EXERCISE
 /EXERCISE=(FULL,[NO]KEEP,PATTERN)
 /NOEXERCISE (default)

  Controls whether the media should actually be tested. You can
  update the DBBF without erasing the contents of the volume by 
  using the /NOEXERCISE qualifier along with the /BAD_BLOCKS
  qualifier.


  Qualifier Keywords

  FULL

       Causes BAD to test the media using three test patterns (0s,
       1s, and "worst case") instead of the default single "worst
       case" pattern. The FULL keyword can be used only with
       /EXERCISE.  Note that the "worst case" test pattern always
       remains on media tested with the /EXERCISE qualifier.

  KEEP

       Ensures the preservation of the current software detected bad
       block file (SDBBF). The keep keyword is the default when
       /NOEXERCISE is specified.

  NOKEEP

       Causes BAD to create a new SDBBF. The NOKEEP keyword is the
       default when /EXERCISE is specified. This keyword cannot be
       used with the /NOEXERCISE qualifier.

  PATTERN=(value[,...])

       Allows users to specify the value of a test pattern to be 
       used as "worst case". Up to an octaword of test pattern 
       data may be specified in decimal (%D), hexadecimal (%X), 
       or octal (%O) radixes. The default radix is decimal.      

       The pattern is specified in longwords. If two or more 
       longwords are specified, they must be enclosed in 
       parentheses and separated by commas.

/LOG
 /LOG
 /NOLOG (default)

  Specifies whether a message is sent to the current SYS$OUTPUT
  device and SYS$ERROR, indicating the total number of bad blocks
  detected by BAD.

/OUTPUT
 /OUTPUT[=filespec]

  Specifies whether the contents of the DBBF are written to the
  specified file.  If you omit the /OUTPUT qualifier, no output 
  is generated.

  If you specify /OUTPUT but omit the filespec, the contents of 
  the DBBF are written to the current SYS$OUTPUT device.

  When you specify /OUTPUT, the /SHOW=AFTER qualifier is implied.


  Qualifier Value

  filespec

       Identifies the output file for storing the results of the 
       medium analysis. If you specify a file type and omit the
       file name, the default file name ANALYZE is used. The default 
       file type is ANL. If you omit the filespec, the results are
       output to the current SYS$OUTPUT device.

       No wildcard characters are allowed in the file specification.

/RETRY
 /RETRY
 /NORETRY (default)

  Enables the device driver to retry soft errors.

/SHOW
 /SHOW[=(keyword[,...])]

  Lists the contents of the DBBF before or after (or both) the 
  medium is exercised or modified.                            


  Qualifier Keywords

  [NO]BEFORE,[NO]AFTER

      Specifies whether the contents of the DBBF are listed before or
      after (or both) the medium is exercised. After is the default.