Mode Select Parameters: Caching Parameters - Fujitsu MAP3147 Scsi Logical Interface Specifications

Parameter Data Formats
Bit
Byte
0
1
2
Default
Variable
3
Default
Variable
4-5
Default
Variable
6-7
Default
Variable
8-9
Default
Variable
10-11
Default
Variable
12 FSW
Default
Variable
13
Default
Variable
14-15
Default
Variable
16
17-19
Default
Variable
Figure 4.6
The parameters defined in this page descriptor control the range of look-ahead data in the Look-
Ahead cache feature and enable or disable the caching operation. See Section 2.2, "Look-Ahead
Cache Feature" and Section 2.3, "Write Cache" concerning details of the Look-Ahead cache feature
and parameter setting methods.
4 - 22
7 6 5
0 0 0
X'0A' or X'12' (Page Length)
IC ABPF CAP
0 0 0
1 0 0
Demand Read Retention Priority
0 0 0
0 0 0
Pre-fetch inhibit block count
Maximum pre-fetch limit block count
LBCSS DRA
1 0 0
0 0 0

MODE SELECT parameters: caching parameters

4 3
0 1
DISC SIZE WCE
1 0
0 0
Write Retention Priority
0 0
0 0
X'FFFF'
X'0000'
Minimum pre-fetch
X'0000'
X'0000'
Maximum pre-fetch
X'0000'
X'0000'
X'FFFF'
X'0000'
VS VS
0 0
0 0
Cache Segment Count
X'08'
X'3F'
Cache Segment Size
X'0000'
X'0000'
X'00' (Reserved)
Non Cache Segment Size
X'000000'
X'000000'
2 1 0
0 0 0
MS RCD
1 0 0
1 0 1
0 0 0
0 0 0
(Reserved)
0 0 0
0 0 0
C141-E167