Disconnect/Reconnect Page - Tandberg Data SLR7-140 PROGRAMMER Manual

BYTE BIT 7
00 PS
01 Page Length = 0Eh
02 Read Buffer Full Ratio
03 Write Buffer Empty Ratio
04 Bus Inactivity Time
05
06 Disconnect Time Limit
07
08 Connect Time Limit
09
10 Maximum Burst Size
11
12 EMDP
13 RESERVED
14 First Burst Size
15
Table 14-15:
PS
Page Code
Page Length
Read Buffer Full
Ratio
Tandberg Data
14.3.4.

Disconnect/Reconnect Page

This page is used to specify the Drive's disconnect and
reconnect parameters.
The page can be saved.
6 5
R Page Code = 02h
FARd FAWrt
Disconnect/Reconnect Page Descriptor
The Parameter Savable (PS) bit must be set to zero.
The Page Code for this page must be set to 02h.
The Page Length field must always be set to 0Eh.
The read buffer full ratio indicates to the Drive, on
READ commands, how full the buffer will be prior to
reconnecting. The read buffer full ratio is a number in
the range 0..255. A value of 0 indicates that only one
block ready in
reconnect. A value of 255 indicates that the buffer must
be almost 100 % full before a reconnect occurs (assuming
a 4 MByte data buffer). This field is changeable.
The actual amount of data (in number of bytes) needed
for a reconnect can be calculated using the following
formula:
Nb = 512
Nb = (Rbfr * 16 KBytes)
(Where Nb = Number of bytes and Rbfr = Read Buffer Full
Ratio)
If the specified Read Buffer Full Ratio corresponds to
an amount of data that is larger than the installed data
buffer size, the drive will round the Read Buffer Full
Ratio down to a value corresponding to the actual buffer
size.
Legal values are numbers in the range 0..255.
14-13 Tandberg SLR Product Line SCSI Functional Specifications
4 3
FAStat DImm
the buffer is
for Rbfr equal to 0
for Rbfr not equal to 0
Mode Select
2 1 0
DTDC
enough to force a