IBM 1725 SLS - Manual (Page 90)

Memory
QMS 1725 SLS Print System User's Guide 2-56
Disk Cache
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.
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
n
120 KB minimum
n
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 120 MB hard disk is 180 KB, and for two 120 MB
hard disks it is 240 KB. These are recommended values. The printer
will still operate with a smaller cache, but decreased performance
may result.
Menu Administration/Memory/K Mem Disk Cache
Choices 00032-99999
Default Variable
Notes If no hard disk is used, the disk cache should be set to the
minimum. The printer then reallocates the released memory to
other clients that need additional memory.
If one or more hard disks are used, they remain unavailable
until sufficient memory is available to the disk cache.
If you change the K Mem Disk Cache value, the printer
automatically restarts after you save your changes and exit
from the configuration menu.