Fujitsu MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES Caching parameters, Cache control parameters

2.2.2Caching parameters

The IDD supports the MODE SELECT parameters (caching parameters: page code = 8) shown in Figure 2.5 for controlling the cache feature. See Section 4.1 concerning details of the MODE SELECT parameters.

[Caching Parameters (Page Code = 8)]

	Bit	7	6	5	4	3	2	1	0
Byte
0		0	0	0	0	1	0	0	0
1				X‘0A’ or X‘12’ (Page Length)
2		IC	ABPF	CAP	DISC	SIZE	WCE	MS	RCD
	Default	0	0	0	0	0	1	0	0
	Variable	1	0	0	0	0	1	0	1
3					X‘00’ (Reserved)
4-5					Prefetch-suppressed block count
	Default				X‘FFFF’
	Variable				X‘0000’
6-7					Minimum prefetch
	Default				X‘0000’
	Variable				X‘0000’
8-9					Maximum prefetch
	Default				X‘00xx’
	Variable				X‘0000’
10-11					Maximum prefetch limit block count
	Default				X‘FFFF’
	Variable				X‘0000’
12		FSW	LBCSS	DRA	VS	VS		Reserved
	Default	1	0	0	0	0	0	0	0
	Variable	0	0	0	0	0	0	0	0
13					Cache segment count
	Default				X‘10’
	Variable				X‘3F’
14-15					Cache segment size
	Default				X‘0008’
	Variable				X‘0000’
16					X‘00’ (Reserved)
17-19					Non cache buffer size
	Default				X‘000008’
	Variable				X‘000000’

Remark:

The variable column indicates whether the parameter can be changed or not (if "1", the parameter can be changed).

Figure 2.5 Cache control parameters

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