HP A4800A Manual de usuario descargar pdf (Pagina 26)

Installing the A4800A Adapter

Connecting SCSI Peripheral Devices

Chapter 226

You can connect up to four devices if they are evenly spaced on a 3 m

Ultra SCSI cable (0.75 m between devices). The single-ended SCSI bus

must not exceed 3 m (total internal and external cable lengths) even with

fewer than four devices.

Table 2-4 below shows the maximum bus length for each of the SCSI

types.

Table 2-4 Maximum SCSI Bus Lengths

Type

Maximum Bus Length (in Meters)

(1)

Maximum

Devices

Single-ende

d (SE)

Low

Voltage

Differentia

l (LVD)

High

Voltage

Differentia

l (HVD)

SCSI-1 6 12.5 25 8

Fast SCSI 3 12.5 25 8

Fast Wide

SCSI

3 12.5 25 16

Ultra SCSI 1.5 12.5 25 8

Ultra SCSI 3 - - 4

Wide Ultra

SCSI

- 12.5 25 16

Wide Ultra

SCSI

1.5 - - 8

Wide Ultra

SCSI

3--4

Ultra2 SCSI

(2)

12.5

(2)

WideUltra2

SCSI

(2)

12.5

(2)

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 63 64

Service and User Guide 1
Legal Notices 2
1 HP A4800A Adapter Overview 5
HP A4800A Adapter Overview 6
Chapter 16 6
• “Features” on page 9 6
About the A4800A Adapter 7
Features 9
Supported HP 9000 Servers 10
Cable Speciﬁcations 11
Chapter 2 13 13
Preparing for Installation 15
Handling the A4800A Adapter 17
Setting SCSI IDs 29
Verifying Installation 31
3 Troubleshooting 33
Troubleshooting 34
Chapter 334 34
General Procedure 35
The SCSI Command 37
SCSI rate 38
SCSI rate 5 2 10 38
SCSI rate 5 2 38
PCI device /5.2 = fast SCSI 38
SCSI init 39
SCSI init 5 2 39
PCI device /5.2 = 7 39
SCSI init 5 2 6 40
PCI device /5.2 = 6 40
Representative 42
Chapter 344 44
A SCSI Sense Codes 45
B Regulatory Information 61
Regulatory Statements 62
VCCI Statement (Japan) 63
Declaration of Conformity 64

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