HDCACHEINFO Subroutine

Usage:

info = HDCACHEINFO(num)

Description:

Obtains information about a given hard drives (zero-based) cache that was opened by OPEN CACHE. A non-zero return value indicates a cache was found. The return value contains several members that provide the information.

The member names are:

SIZE	Size of the cache in bytes.
MAXIOREQ	Largest I/O request (in bytes) to cache.
FLAGS	Cache flags (Bit 0=Lazy Write, Bit 1=Partial Lazy Write).
READHIT	Number of cache read hits.
READMISS	Number of cache read misses.
WRITEHIT	Number of cache write hits.
WRITEMISS	Number of cache write misses.
ERRORS	Number of cache aborts (memory or lazy write failure)
WRITEERRORS	Number of lazy write failures

Example:

sub main()

ext("mount 0: 0 0x01")

ext("open cache 0")

info=hdcacheinfo(0)

if info then

printl("Size:", info.size)

printl("Max IO Request Cached:", info.maxioreq)

printl("Flags:0x", hex(info.flags))

printl("Read Hits:", info.readhit)

printl("Read Misses:", info.readmiss)

printl("Write Hits:", info.writehit)

printl("Write Misses:", info.writemiss)

printl("Errors:", info.errors)

printl("Lazy Write Errors:", info.writeerrors)

printl("")

else

printl("No cache found")

end if

ext("close cache 0")

ext("umount 0:")

end sub