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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 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
disk drives 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.
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This field on the status page shows the size of the physical RAM
installed in the printer. If a hard disk is installed and disk swapping is
enabled (Administration/Memory/Enable Disk Swap), this field also
gives the size of available virtual memory.