This memory client stores frequently used data in system memory instead of continually storing and retrieving it from a hard disk. If a hard disk is used and a lot of disk access is required, adding memory to the disk cache may increase the printer's performance. For example, if many fonts are stored on disk, faster access to these fonts is achieved by increasing the disk cache size. Conversely, if no hard disk is used, the disk cache will automatically be set to 0 KB until a hard disk is installed and formatted. However, when one or more hard disks are installed and formatted, disk cache is automatically allocated 256 KB. The disk cache is a high-speed temporary buffer for data going to and from the hard disk. It can speed up the printer in two ways: * Information such as frequently referenced fonts and logos may still be in the cache and may not have to be pulled off a hard disk each time they're needed. * Information being written to a hard disk can be held in the cache temporarily until a more convenient time to be written to disk. The amount of memory needed for the disk cache client is dependent on the size of the disk, the number of disks, the number of subdirecto- ries on each disk, and the amount of memory dedicated to caching. As long as the disk cache is enabled and there is enough memory in the disk cache, all disks are accessible. If insufficient memory is allo- cated to the disk cache, some disks may be seen while others are not. The recommended amount of memory for the disk cache client for all hard disk is as follows: * 45 KB internal usage * 0.5 KB per MB of disk storage total for all disks * 100 KB of memory dedicated to caching For example, the recommended amount of memory for the disk cache for a single 120 MB hard disk would be 208 KB, and for two 120 MB hard disks it would be 268 KB. Size is returned in Kilobytes.