Siemens U3585-J-Z125-8-76 1, SM2 monitoring system manual PCA Controller report

SM2 reports	PCA CONTROLLER report
READ H-R (%)	Percentage of hits based on the total number of read operations to
	be executed as fast reads
WRITE (1/S)	Total number of write operations to disks for which caching is
	performed (in I/Os per second)
FAST W. (1/S)	Total number of fast write operations executed (in I/Os per second)
C-OVER (1/S)	Number of unsuccessful attempts to use the cache due to a cache
	overrun (in I/Os per second)

Notes

If a miss occurs during a caching read operation ("fast read"), the data is read from disk and (in contrast to a read operation) stored in the cache. Cache overruns can only occur in write operations. In the event of an overrun, the write operation bypasses the cache and is performed directly on the disk.

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