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STAC ELECTRONICS
TECHNICAL SUPPORT BULLETIN
NUMBER: 009
SUBJECT: CACHE
DATE: May 24, 1991
TIME: 3:00 PM
SOURCE: Engineering, Tech Support
SUPERCEDES/
SUPERCEDED BY:
RELEASE STATUS: Public
TITLE:
STACKER and disk-cache programs.
OVERVIEW:
While STACKER includes its own cache, the driver is compatible with other
products that perform the same function.
Norton's NCACHE and Microsoft WINDOWS' SMARTDRV.SYS are loaded from the
CONFIG.SYS, usually before STACKER. Other programs, such as PC-KWIK and
PC-CACHE, load from the AUTOEXEC.BAT file, after STACKER.
ISSUES/COMMENTS:
1) Some cache programs (e.g., PC-CACHE, PC-KWIK) may report that a
particular drive letter is not eligible for caching, but caching proceeds
normally.
2) When multiple cache programs are operating, disk reads/writes may have
unpredictable results. Use of memory may also be negatively impacted.
RECOMMENDED ACTIONS:
1) Alter the settings for the cache so that the uncompressed, host drive
is cached. This will, by extension, cache any STACKER volumes residing
on it. (The PC-KWIK message can be avoided by excluding the STACKER
volume when the cache program is invoked. Consult PC-KWIK documentation
for the appropriate parameter.)
2) If a commercial cache program is running, specify a STACKER cache of 0
bytes (/M=0)