Short for Landing Zone, lzone or LZ is a setting used to specify the Landing Zone of the heads on a computer hard drive. Today, with new computers, the lzone is no longer required as most computer hard drives autopark. Setting the CMOS values to Auto will automatically allow the computer to define the Landing Zone.
For computers and devices requiring the Landing Zone to be defined, you can define the value as the number of cylinders plus 1. For example, if you had 3924 cylinders for your hard drive, you would set both the Landing Zone and the Write Precomp as 3925.