Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 81)

100

101

Using the Motion Threshold and Reconnect Threshold

This section explains how to increase the efficiency of data transfers to

and from the CTS’s buffer by adjusting the motion threshold and

reconnect threshold. Although start/stop operations are not as efficient

as streaming operations, you can maximize start/stop performance

by adjusting the motion threshold. You can maximize streaming

performance by adjusting the reconnect threshold. You adjust these

thresholds using the MODE SELECT command (see Table 3-5), or you

can request default values for these thresholds as an EEPROM option.

Table 3-5 indicates where you can set the motion and reconnect

thresholds using the MODE SELECT command. If you send

conflicting values on different pages of the MODE SELECT

command, the value that is received last by the CTS takes precedence.

To set this

threshold...

Use any of these fields in the MODE SELECT command...

Page Field

Motion

threshold

(Non-page format)

Motion Threshold—Byte 02 of the

vendor-unique parameters

Device Configuration Page

(Page Code = 10h)

Write Buffer Full Ratio—Byte 04

and

Read Buffer Empty Ratio—Byte 05

(these values must be equal)

Vendor Unique Parameters Page 1

(Page Code = 20h)

Motion Threshold—Byte 04

Reconnect

threshold

(Non-page format)

Reconnect Threshold—Byte 03 of

the vendor-unique parameters

Disconnect-Reconnect Page

(Page Code = 02h)

Buffer Full Ratio—Byte 02

and

Buffer Empty Ratio—Byte 03

(these values must be equal)

Table 3-5 Where to set the motion threshold and reconnect threshold

May 1994 EXB-8205 and EXB-8505

(Standard and XL)

3-19

3 Implementing CTS Operations

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Exabyte EXB-8205 Instruções de Operação Página 81

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