1 QUOTA_CHECK
 The QUOTA_CHECK command compares your present disk quota on your
 default disk drive to two limits.  If the larger of the two limits
 is exceeded, a warning message is produced.  If the smaller is exceeded,
 an alarm is sounded.  It is recommended that this command be placed
 in your LOGIN.COM.  If only an upper limit is provided, the lower
 limit will be half the upper.  If no limits are provided, 4000 blocks
 and 2000 blocks are used.

    QUOta_check  [upper_limit [lower_limit]]
