The HDD is managed and allocated in clusters. A group of clusters is called a chain. The Scheduling option in Win 3.1 determines how much of the system's resources are dedicated to foreground applications. MFM and RLL drives are affected by changes in temperature and require low level formats. RLL drives use built in data compression.
Entries have two parts- an entry name and a value.
Logical Sectors are like pieces of the pie and Tracks are pieces of slices that get smaller as they are cut towards the middle. Talk to the Customer - Find out the problem, believe the customer but use hidden skepticism. Gather Information - Probe the customer for anything they might not be telling you. If the process of elimination goes beyond 2 or 3 elements, start writing it down.