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Disconnect-Reconnect page
SCSI drives
The Disconnect-Reconnect page has the following format for SCSI drives:
PS (0)
0
1
2
3
4
(MSB)
5
(MSB)
6
7
8
(MSB)
9
10
(MSB)
11
12
13–15
Disconnect-Reconnect page fields:
Buffer Full Ratio
Connect Time Limit
Bus Inactivity Limit
Disconnect Time Limit
Connect Time Limit
Maximum Burst Size
DTDC
If the host does not grant disconnect privilege in its
NOTE:
parameters become meaningless. The drive will stay connected on the bus for the duration of
an operation or until the host sends a mid-operation
78
Commands
7
6
5
Rsvd (0)
Additional Page Length {0Eh}
Reserved (0)
0 Buffer management is controlled by the drive, so this should always be zero.
0 Buffer management is controlled by the drive, so this should always be zero.
0 This parameter is not supported and should be zero.
0 This parameter is not supported and should be zero.
0 This parameter is not supported and should be zero.
>0 The maximum amount of data that will be transferred during a data-in or
data-out phase before disconnecting. This field is in units of 512 bytes. The
maximum burst size that the drive supports is 127 (7Fh) blocks of 512 bytes,
that is, 64 KB less 512 bytes.
0 The drive may send bursts of any size. This is the default value.
0 The Data Transfer Disconnect Control field is not supported and should be
zero.
4
3
Page Code {02h}
Buffer Full Ratio (0)
Buffer Empty Ratio (0)
Bus Inactivity Limit (0)
Disconnect Time Limit [0]
Connect Time Limit (0)
Maximum Burst Size [0]
Reserved (0)
IDENTIFY
2
1
0
(LSB)
(LSB)
(LSB)
(LSB)
DTDC (0)
message these
IDENTIFY
granting disconnect privilege.
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