Lzone
Short for Landing Zone, lzone, or LZ is a setting used to specify the Landing Zone of the heads on a computer hard disk drive. Today, with new computers, the lzone is no longer required as most computer hard disk drives autopark. Setting the CMOS values to Auto will automatically allow the computer to define the Landing Zone.
However, for older computers and devices that require the Landing Zone to be defined or only have a "custom" or "user-defined" option that requires a numerical value defining the Landing Zone you can define the value as the number of cylinders plus one. For example, if you had 3924 cylinders for your hard drive you would set both the Landing Zone and the Write Precomp as 3925.
Also see: Hard disk drive definitions, Write Precomp