QMS 2060 Reference page 93

The K Mem Disk Cache is the number of kilobytes of RAM dedicated
to the disk cache. This memory client speeds file system throughput
on any installed hard disks by storing frequently used data in system
memory instead of continually storing it to and retrieving it from a hard
disk.
Menu Administration/Memory/Manual Config/K Mem Disk Cache
Choices 00000-30720
Default 00028
Notes If no hard disk is installed (such as on the QMS 2060 BX
system), the disk cache will be set to the minimum (zero). The
printer then reallocates the released memory to other clients that
need additional memory.
If you change the K Mem Disk Cache value, the printer
automatically restarts after you save your changes and exit from
the configuration menu.
The amount of memory needed for this memory client depends on
the size and number of hard disks, the number of subdirectories on
each disk, and the amount of memory dedicated to caching.
» Note: If sufficient memory is available to the disk cache, all disks are
accessible. If insufficient memory is available to the disk cache, some
disks may be accessible while others may not be.
The recommended amount of memory for the disk cache client is
128 KB minimum plus 0.5 KB per MB of disk storage total for all
disks
For example, the recommended amount of memory for the disk cache
for a single 1200 MB hard disk is 728 KB, and for two 1200 MB hard
disks it is 1456 KB. These are recommended values. The printer will
still operate with a smaller cache, but decreased performance may
result.