  BACKUP and CRC qualifier? 
 The Question is:
 
The backup command has a /crc qualifier what is your opinion about using the
/nocrc qualifier to reduce time for backups?
 
 
 
 The Answer is:
 
    The best way to determine if there is a tangible different between /CRC
    and /NOCRC with your particular combination of CPU, memory, I/O
    subsystem, disk drives, tape drives, peripheral topology, and data is
    with a stopwatch.
 
    Perform the same BACKUP command against the same data to determine if
    there is a measurable (or significant) difference. If you do choose to
    perform backups with /NOCRC, you need to accept that you've reduced
    your protection against data errors.
 
    Only you can decide if the tradeoff between speed and protection is
    worthwhile.
 
