Technical data

2.12.10 SCSI Utility Guidelines

Follow these guidelines about the SCSI utilities:

• The key utilities can only be run from the Digital Services environment.

An error code of 181 displays if you run the key utilities from the customer

environment.

• Never run a SCSI utility on the host ID (ID = 6).

• An error mnemonic of SCSI_E_type indicates you cannot perform the

utility on the speciﬁed device, for example, running the tape key utility on

a ﬁxed disk. Refer to Table A–12 for a list of SCSI utility text messages.

• On the formatter and erase utilities, you must type OK at the DKAxxx OK

prompt, or an error appears.

• An error occurs if an invalid device ID or logical unit number (always 0) is

entered. Enter the SHOW DEVICE command at the console prompt for the

correct IDs.

• If a drive is not listed in the SHOW DEVICE table, check SCSI and power

connections, and check for duplicate device IDs.

2.12.11 TURBOchannel Adapter Utilities (Model 60 Only)

The MIPS/REX emulator utility executes TURBOchannel option ﬁrmware. The

emulator functions as follows:

• Each MIPS instruction that would normally be executed by a MIPS

processor, passes through the emulator software and executes.

• REX callback routines that would normally be provided by the DECstation

console, are either mapped 1 to 1 to their VAXstation console equivalents

or support routines are added where functions are different than those

provided in the VAXstation.

• Allows the execution of canned tests and utilities for speciﬁc TURBOchannel

options as if the user were sitting in front of a DECstation.

2–42 Diagnostic Testing