QMS 1060, User Manual

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Memory
QMS 1060 Print System Reference 5-20
Disk Cache
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 exam-
ple, 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 should be set to its minimum value until a
hard disk is installed. However, when one or more hard disks are
installed, they are not available until the disk cache client is
increased.
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 disk cache is a high speed temporary buffer for data going to and
from the hard disk. It can speed the printer in two ways:
n
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.
n
Information being written to a hard disk can be held in the cache
temporarily, if necessary, until a more convenient time to be writ-
ten to disk.
The recommended amount of memory for the disk cache client is as
follows:
n
20 KB internal usage
n
0.5 KB per MB of disk storage total for all disks
n
100 KB of memory dedicated to caching