Fujitsu MAF3364FC, MAG3091FC, MAG3182FC manual Disc, Xffff, X0XXX, Rlec

a. Read caching parameters
		Parameter	Default value
	• RCD:	Disabling Read-Ahead caching operations	0 (enabled)
	• WCE:	Write Cache Enable	0 (disabled)
	• MS:	Specifying the multipliers of "minimum prefetch"	0 (Specifying
		and "maximum prefetch" parameters	absolute value)
	• DISC:	Prefetch operation after track switching during	0 (inhibit)
		prefetching
	• Number of blocks for which prefetch is suppressed		X'FFFF'
	• Minimum prefetch		X'0000'
	• Maximum prefetch		X'0XXX'
			(1 cache segment)
	• Number of blocks with maximum prefetch restrictions		X'FFFF'
	• Number of segments		X'4'

IMPORTANT

1.When Read-Ahead caching operations are disabled by the caching parameter, these parameter settings have no meaning except write cache feature.

2.Determine the parameters in consideration of how the system accesses the disk. When the access form is not determined uniquely because of the processing method, the parameters can be re-set actively.

3.For sequential access, the effective access rate can be increased by enabling Read-Ahead caching operations and Write Cache feature.

(4)Control mode parameters

The following parameters are used to control the tagged queuing and error logging. a. Control mode parameters

	Parameter	Default value
• RLEC:	Specification of operation when cumulative	0 (Does not
	value parameter reaches maximum value 0	report error)
• Queue algorithm modifier		0 (Ordering is
		executed by read
		command only.)
• QErr:	Resume or abort remaining suspended	0 (After release
	commands after sense pending state	of sense retention
		status, executes
		queued command.)

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