Installation guide

Mass Storage Devices............................... 6–6
External Mass Storage Devices ....................... 6–7
Network Devices .................................. 6–7
Identifying Mass Storage Devices ........................ 6–7
DSSI and SCSI Devices . . ........................... 6–7
Buses Associated with Each Compartment .............. 6–8
Drive IDs ........................................ 6–8
Determining a Drive’s Address........................ 6–8
Displaying Configuration Information Online ............... 6–10
Overview ........................................ 6–10
Displaying System Configuration . . ................... 6–10
Displaying Memory Information . . . ................... 6–12
Displaying Device Information ........................ 6–13
Displaying Console Program Version ................... 6–15
Displaying PALcode Version .......................... 6–15
Planning a Change to Your Configuration .................. 6–16
Perform Pre-Upgrade Tasks .......................... 6–16
Perform Post-Upgrade Tasks ......................... 6–17
Adding Third-Party Devices .......................... 6–17
Connecting Additional Devices to Your System .............. 6–18
Bus Expansion Ports ............................... 6–18
Extending a Fast SCSI Bus .......................... 6–18
Connecting Additional Devices: Rules .................. 6–18
Terminating and Extending a Bus . ................... 6–20
Terminating an Extended Bus ........................ 6–20
Changing Drive ID Numbers . ........................... 6–22
When to Change Drive ID Numbers ................... 6–22
Changing a Drive ID: Rules.......................... 6–22
Changing a Drive ID Plug ........................... 6–23
Setting and Examining Parameters for DSSI Devices ......... 6–24
When to Change DSSI Device Parameters ............... 6–24
Changing DSSI Device Parameters: Rules .............. 6–24
Using cdp and show device du pu Commands . . .......... 6–24
show device du pu ................................. 6–25
cdp............................................. 6–26
DSSI Device Parameters: Definitions and Function ....... 6–26
DSSI Device Parameter Descriptions ................... 6–27
How OpenVMS AXP Uses the DSSI Device Parameters . . . . 6–28
Example: Modifying DSSI Device Parameters . . .......... 6–29
Using the Power Control Bus with a Storage Expander........ 6–32
Power Control Bus for Expanded Systems ............... 6–32
References .......................................... 6–33
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