Seagate ST12550WD Uživatelská příručka stáhnout pdf (Strana 18)

Chapter 2. Configuration Guidelines

EK–KZPSA–UG. B01 2–5

2.11 Device Disconnects

To optimize overall SCSI bus performance, the adapter default allows device

disconnects. This means that a device that realizes a need for a lengthy delay be-

fore the next data can be transferred can disconnect this operation to allow an-

other device to utilize the bus, and resume it later when the data is available.

This disconnect may also be disabled when there is only a single device on the

bus. By preventing disconnects, performance can be improved as the disconnect /

reconnect protocol time is avoided. When a single device is connected to the

SCSI bus, optimum performance is usually obtained by disabling disconnects.

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KZPSA PCI-to-SCSI 1
Storage Adapter 1
Contents 3
EK–KZPSA–UG. B01 v 5
Revision Record 6
About This Guide 7
Associated Documents 9
Conventions 9
Product Description 10
1–2 EK–KZPSA–UG. B01 11
EK–KZPSA–UG. B01 1–3 12
1.2 Standards 13
1.3 Specifications 13
Configuration Guidelines 14
2.3 SCSI Bus Configuration 15
2.2 PCI Bus Configuration 15
2.4 SCSI Bus Termination 16
2–4 EK–KZPSA–UG. B01 17
2.11 Device Disconnects 18
Installing the KZPSA Adapter 19
3–2 EK–KZPSA–UG. B01 20
EK–KZPSA–UG. B01 3–3 21
3–4 EK–KZPSA–UG. B01 22
EK–KZPSA–UG. B01 3–5 23
OpenVMS AXP and OSF/1 Systems 24
4–2 EK–KZPSA–UG. B01 25
4.4 KZPSA SCSI ID 26
4.5 SCSI Termination Power 26
4.6 SCSI Fast Data Transfer 26
4.7 KZPSA Device Booting 27
Windows NT AXP Systems 28
5–2 EK–KZPSA–UG. B01 29
EK–KZPSA–UG. B01 5–3 30
5–4 EK–KZPSA–UG. B01 31
KZPSA Adapter Utilities 32
6–2 EK–KZPSA–UG. B01 33
Table 6–1 Keyboard Functions 33
Key Function 33
EK–KZPSA–UG. B01 6–3 34
6–4 EK–KZPSA–UG. B01 35
Figure 6–1 Initial Screen 35
EK–KZPSA–UG. B01 6–5 36
Figure 6–2 Options 36
6–6 EK–KZPSA–UG. B01 37
Figure 6–3 SCSI Options 37
EK–KZPSA–UG. B01 6–7 38
6–8 EK–KZPSA–UG. B01 39
Figure 6–5 Diagnostics 39
EK–KZPSA–UG. B01 6–9 40
Figure 6–6 Error Log Example 40
6.3 Firmware Update Utility 41
EK–KZPSA–UG. B01 6–11 42
Troubleshooting 43
7.2 System Power-on Problems 44
7.3 SCSI Device Problems 45
7–4 EK–KZPSA–UG. B01 46
Continued) 46
7.4 Boot Sequence Problems 47
Release Notes 48
Verified Device Listing 49
Mandatory Console Code Update 50
Restrictions 51
Additional Information 52
B.1 Configuration Summary 53
B.2.2 SCSI ID Selection 54
B.2.3 SCSI Bus Termination 54
EK–KZPSA–UG. B01 B–3 55
B.3.2 SCSI ID Selection 56
B.3.3 SCSI Bus Termination 56
EK–KZPSA–UG. B01 B–5 57
B–6 EK–KZPSA–UG. B01 58
EK–KZPSA–UG. B01 B–7 59
B.4.2 SCSI ID Selection 60
B.4.3 SCSI Bus Termination 60
Glossary 61
G–2 EK–KZPSA–UG. B01 62
EK–KZPSA–UG. B01 G–3 63
G–4 EK–KZPSA–UG. B01 64
EK–KZPSA–UG. B01 G–5 65
Reader’s Comments 66

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