Disconnect/Reconnect Page (02 H ) - Seagate MEDALIST 1080SL Product Manual

Medalist 1080sl SCSI Product Manual, August 1995
C.2 Disconnect/Reconnect page (02
The Disconnect/Reconnect 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 (default)
changeable
3 (default)
changeable
4–5 (default)
changeable
6–7 (default)
changeable
8–9 (default)
changeable
10–11 (default)
changeable
12–15 (default)
changeable
Byte 2 The buffer full ratio field indicates, on Read commands,
how full the drive's buffer is before reconnecting. The drive
rounds up to the nearest whole logical block. This parame-
ter is the numerator of a fraction that has 256 as its
denominator.
Byte 3 The buffer empty ratio field indicates, on Write com-
mands, how empty the drive's buffer is before reconnect-
ing to fetch more data. The drive rounds up to the nearest
whole logical block. This parameter is the numerator of a
fraction that has 256 as its denominator.
Bytes 4–5 The bus inactivity limit field indicates the time, in 100- sec
increments, that the drive can assert the Busy signal
without handshakes until it disconnects. The drive can
round down to its nearest capable value. If the bus inac-
tivity limit is 0000
for 1 msec without handshakes.
)
H
Bits
6 5 4 3
Page code (02
Page length (0E
H
Buffer full ratio (99
H
FF
H
Buffer empty ratio (99
FF
H
Bus inactivity limit (0000
0000
H
Disconnect time limit (0000
0000
H
Connect time limit (0000
0000
H
Reserved (0000
H
0000
H
Reserved (00000000
00000000
H
, the drive maintains the BSY– signal
H
81
2 1 0
)
H
)
)
)
H
)
H
)
H
)
H
)
)
H