Caching Parameters; Figure 2.5 Cache Control Parameters - Fujitsu MAX3073NC - SCSI,80, Dell DC961,Hard Drive Scsi Logical Interface Specifications

2.2.2

Caching 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.
Bit
Byte
0
1
2
Default
Variable
3
4-5
Default
Variable
6-7
Default
Variable
8-9
Default
Variable
10-11
Default
Variable
12
Default
Variable
13
Default
Variable
14-15
Default
Variable
16
17-19
Default
Variable
Remark:
The variable column indicates whether the parameter can be changed or not (if "1", the parameter
can be changed).
C141-C010
[Caching Parameters (Page Code = 8)]
7 6 5
0 0 0
X'0A' or X'12' (
IC ABPF CAP
0 0 0
1 0 0
FSW LBCSS DRA
1 0 0
0 0 0
Figure 2.5 Cache control parameters
2.2 Look-Ahead Cache Feature
4 3 2
0 1 0
Page Length
)
DISC SIZE WCE
1 0 1
0 0 1
X'00' (Reserved)
Prefetch-suppressed block count
X'FFFF'
X'0000'
Minimum prefetch
X'0000'
X'0000'
Maximum prefetch
X'00xx'
X'0000'
limit block count
Maximum prefetch
X'FFFF'
X'0000'
VS VS
0 0 0
0 0 0
Cache segment count
X'08'
X'3F'
Cache segment size
X'0000'
X'0000'
X'00' (Reserved)
Non cache buffer size
X'000000'
X'000000'
1 0
0 0
MS RCD
0 0
0 1
Reserved
0 0
0 0
2-9