User's Manual

DLT4000 SCSI Interface
DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem 8-53
8.4.9.4 Disconnect/Reconnect Page (02h)
The drive supports the Disconnect/Reconnect Page which has the following format:
Bit
7 6 5 4 3 2 1 0
0 PS(0) 0 Page Code (02h)
1 Additional Page Length (0Eh)
2 Buffer Full Ratio
Byte 3 Buffer empty Ratio
4 (MSB)
5 Bus Inactivity Limit (LSB)
6 (MSB)
7 Disconnect time Limit (LSB)
8 (MSB)
9 Connect time Limit (LSB)
10 (MSB)
11 Maximum Burst Size (LSB)
12 Reserved DTDC
13 Reserved
14 Reserved
15 Reserved
Figure 8-33 Disconnect/Reconnect Page Format
In this page, only the Maximum Burst Size parameter is changeable.
The following parameters in this page are supported:
Maximum Burst Size
This value specifies the maximum amount of data that will be transferred without
disconnecting. A value of zero sets no limit. This value is in units of 512 bytes. For
example, a value of 8 means 4k bytes. Values that are not multiples of 8 are rounded
up to the closest multiple of 8.
Data Transfer Disconnect Control (DTDC)
The DTDC field defines further restrictions on when a disconnect is permitted.