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 hdwrench.library
  FindControllerID
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  QueryFindValid
  QueryInquiry
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  ReadRDBStructs
  ReadRDBs
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Docs » Autodocs » hdwrench.library » FindDefaults

NAME

    FindDefaults

SYNOPSIS

    error = FindDefaults ( Optimize, Return )
    D0                     D0        A0
    ULONG FindDefaults ( BOOL Optimize, struct DefaultsArray *Return )

FUNCTION

    Determine last useable block on the drive. From this information
    derive standard partitioning data according to three algorithms.
    1) Use standard 1 megabyte per cylinder values. Fall back to 100k
       per cylinder if waste space for 1 megabyte per cylinder is
       greater than 0.1% of the drive. (Exact values: 1045876 and 106496
       bytes respectively.
    2) Attempt to optimize the disk per standard algorithm.
    3) Attempt to optimize the disk per the old HardFrame algorithm.
       (deprecated)

INPUTS

    Optimize    USHORT Flag bits to set optimization method
    Return      Pointer to struct DefaultsArray to contain return values
    Optimize Flag bits:
     DA_OPTIMIZE  Attempt to optimize usage of the drive.
     DA_HUGE      Allow full usage of drives larger than 4 gigabytes.
                  (Otherwise default to 4 gigabytes on large drives.)
     DA_HF_WAY    Attempt to optimize with the old HF algorithm. This
                  flag preempts DA_OPTIMIZE and DA_HUGE if set. It's
                  use is deprecated.

NOTES

    This function requires the library already have a device open for the
    evaluation process.

RESULT

    Error   ULONG error indication per following:
             DA_NOERRORS            Good results returned
             DA_NO_CAPACITY_REPORT  No capacity report received. (not fatal)
             DA_NO_OPTIMIZE         Could not optimize the drive. (not fatal)
             DA_BAD_MODESENSE_4     No Format Device page mode sense returned
             DA_BAD_MODESENSE_3     No Geometery page mode sense returned
             DA_NO_DRIVE_OPEN       Fatal: No drive open to evaluate.
             DA_RIDICULOUS_VALUES   Fatal: Values obtained are ridiculous*
            * This means ridiculous as in contains zeros.

BUGS

    This function no longer considers the old Adaptec ST-506 to SCSI converter
    boards. In fact it no longer considers ST-506 drives of any sort.

SEE ALSO

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