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     QMON Stats

  Description:
    This command displays iterative channel statistics for each head and zone.

    Error 100C DETSEC 00008000
    - this error is caused by the error stats log being not initialized.
    Hit ctl-W to initialize the error log.

  Related Commands:
    any level Ctl-W - enables QMON statistics gathering and zeros out the error counters
    level L i   - L>iFFFA will zero out the error counters.
    level L E   - L>E,,0 will disable statistics gathering
                - L>E,,1 will enable statistics gathering
                - L>E,,2 will zero out the error counters

  Input Parameters:
    None

  Output Data:

    
          "Hd Zn Rbit Hard Soft  OTF  BER Wbit Whrd Wrty CWds Bits BadB itrs  LLR  syn  era  non"
          " h zz XX.X XX.X XX.X XX.X XX.X XX.X XX.X XX.X XX.X XX.X XX.X XX.X XX.X XX.X XX.X XX.X"
    
       Where X.XX is the log base 10 value as follows:
    
       Rbit: SECTOR BASED   The number of BITS drive successfully read.  This counter
                            increments by (bytes per sector) * 8 for each sector
                            successfully read.
    
                            This value is forced to be at least equal to the raw error
                            rate.  This is to prevent the math from blowing up if no
                            sectors have been successfully read.
    
       Hard: SECTOR BASED   Bits successfully read divided by sectors that could not be read.
                            The count of sectors not read increments by one per set of retries.
    
       Soft: SECTOR BASED   Bits successfully read divided by errors that required one or more
                            retries, including errors that could not be read.  The error counter
                            increments by one per set of retries.
    
       OTF:  SECTOR BASED   Bits successfully read divided by number of errors that caused the
                            disk sequencer to stop.  The error counter increments by one for each
                            separate retry.
    
       BER:  BIT BASED      True bit error rate. This is
                            log10 ( user bits read / bad bits reported by hardware )
                            Calculation excludes nonconverged sectors.
    
       Wbit: SECTOR BASED   The number of BITS drive succesfully written.  This counter
                            increments by (bytes per sector) * 8 once for each sector
                            successfully written.
    
                            This value is forced to be at least equal to the Wrty value.
                            This is to prevent the math from blowing up if no sectors have
                            been successfully written.
    
       Whrd: SECTOR BASED   Number of bits successfully written divided by number of write
                            hard errors. The error counter increments by one each time
                            the drive fails to write a sector, and it only
                            increments once per set of retries.
    
       Wrty: SECTOR BASED   Number of bits successfully writen divided by errors that
                            required one or more retries to write or failed to write. The
                            error counter increments by one per set of retries.
    
       CWds: CODEWORD BASED Number of codewords that read from media.  Note
                            that codewords are not sectors. A codeword is a unit
                            of user data and correction information.  A 4x1K
                            drive might have four codewords per sector.
    
       Bits: BIT BASED      The number of bits read from media.
    
       BadB: BIT BASED      Number of bits read from media divided by number
                            of bits channel reported in error before correction.
    
       itrs: BIT BASED      Iterations: Number of bits read from media divided by
                            number of extra iterations (beyond one iteration for each
                            codeword) that the channel used.
    
       LLR:  BIT BASED      Number of bits read from media divided by Low
                            Logarithmic Likelihood Ratio count reported by channel.
    
       syn:  SECTOR BASED   Sync errors: The number of sectors (not codewords) read
                            from media divided by the number of sync failures.
    
       era:  CODEWORD BASED Erasures: Number of codewords read from media divided by the
                            number of erasures reported by the channel.
    
       non:  CODEWORD BASED Noncovergent codewords: Number of codewords read from
                            media divided by the number of nonconvergent codewords.
    
    BIT BASED      means the value is based on the number of bits transferred.
    
    SECTOR BASED   means the value is based on the number of user data sectors transferrred.
    
    CODEWORD BASED means the value is based on the number of codewords transferred.  Note
                   that a single user sector may have several codewords.

  Revision History:

    0001.0000   Initial revision.