CFDiskTest::checkConsistencyDiskKey

Description: Checks for consistancy of $vDisk keys between virtual calculation and actual client partitioning. Differences will be inserted into $this-$>$diffConsistency.
Parameter:

• vDisk: Internal disk number (for accessing the disk information in the array).
• key: The key to check for.
• bothUnsetAllowed: Set to true, if both values may be unset (used for the loop).
• tolerance: Maximal allowerd difference between the (numeric) values.

Returns:

• true if virtual calculation and actual client value are equal and both present, otherwise false.