Caching - Seagate MEDALIST 1080SL Product Manual

90 Medalist 1080sl SCSI Product Manual, August 1995
C.6.3 Caching page description
The Caching page is shown below. This table summarizes the function,
the default value and the changeability of each bit.
Bytes
7
0 PS (1)
1
2 IC ABPF CAP DISC SIZE WCE
default 1
changeable 0
Demand read
3
retention priority
default 0
changeable 0
4–5 (default) Disable prefetch transfer length (FFFF
changeable
6–7 (default)
changeable
8–9 (default)
changeable
10–11 (default)
changeable
12 FSW Rsrvd DRA
default 1
changeable 0
13
default
changeable
14–15 (default)
changeable
16 (default)
changeable
17–19 (default)
changeable
Bits
6 5 4 3
Page code (08
Page length (12
H
0 0 1 0
0 0 0 0
Write retention priority
0 0 0 0
0 0 0 0
0000
H
Minimum prefetch (0000
FFFF
H
Maximum prefetch (FFFF
FFFF
H
Maximum prefetch ceiling (FFFF
FFFF
H
Reserved
0 0 0 0
0 1 0 0
Number of cache segments
01
H
FF
H
Cache segment size (0000
0000
H
Reserved (00 )
H
00
H
Noncache segment size (000000
000000
H
2 1 0
)
H
)
MF RCD
1 0 0
1 1 1
0 0 0
0 0 0
)
H
)
H
)
H
)
H
0 0 0
0 0 0
)
H
)
H