HP A4800A Manuel d'utilisateur télécharger pdf (Page 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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HP A4800A Manuel d'utilisateur Page 26

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