Service manual

Console Display and Diagnostics 3-13
➊
The set simm_callout on command sets an internal environment
variable that enables code that isolates failing SIMMs during memory
testing. With this variable enabled, system self-test can take up to 40
seconds longer if a faulty SIMM is present.
➋
The init command initializes the system and prints the console map.
➌ This line in the console display notes that the SIMM callout
environment variable is on.
➍
The show simm command requests a display of faulty SIMMS.
➎
In Example 3-6, no faulty SIMMs were found.
➏
The set simm callout off command turns off the environment
variable that enabled callout of faulty SIMMs.
➐
The init command initializes the system in normal mode.
Example 3-7 shows a show simm command that calls out some failing SIMMs.
Section 5.1.5 tells how to locate, remove, and replace SIMMs in a memory
module.
Example 3-7 Console Mode: Failing SIMMS Found
.
.
➊
.
P01>>> show simm
➋
The following SIMMs are faulty on memory module in slot 7 ➌
J30 J31
➊
The set simm_callout on and init commands are omitted here for
brevity.
➋
The show simm command requests a display of faulty SIMMs.
➌ SIMMS numbered J30 and J31 on the memory module in slot 7 are found
to be faulty.