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Reliability Systems: A Maintenance Aid
555-233-123 6-16 Issue 4 May 2002
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The test duplication-interface [1] a | b [short | long] command tests the
specified TN772 Duplication Interface circuit pack.
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The test shadow-link command tests the SHDW-LINK (Memory
Shadowing Link). Refer to “MEM-BD” in
Chapter 10, ‘‘Maintenance Object
Repair Procedures’’ for a detailed description of this command.
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The set vector <level> [spe-active | spe-standby | spe-maint] command
requests that a core dump be taken when a system restart of level <level>
occurs.
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The reset system interchange command requests an SPE-interchange.
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The test spe-standby [short | long] command tests the Processor,
Memory, Network Control, Processor Interface, Duplication Interface, and
translation card circuit packs in the control carrier containing the Standby
SPE. Refer to “STBY-SPE” in
Chapter 10, ‘‘Maintenance Object Repair
Procedures’’ for a detailed description of this command.
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The refresh spe-standby puts the Standby SPE into Standby mode.
!
CAUTION:
Because of the power of the “refresh spe-standby” command, its full impact
is described here so that it is clearly understood.
The refresh spe-standby command is used to immediately put the Standby SPE
into Standby Mode. The command conducts the same activities regardless of
whether the Standby SPE is already in Standby Mode or whether it is in
Maintenance Mode. When this command is issued, most Standby SPE
maintenance activity that is currently in progress is preempted, the Standby SPE
Processor is held reset, and the Standby SPE Memory is refreshed (that is, all of
Active SPE DRAM Memory is shadowed to Standby SPE Memory). Recall that
the refresh is necessary because, while the Standby SPE is in Maintenance
Mode, memory shadowing is disabled. When the Standby SPE is returned to
Standby Mode, its Memory must be brought up-to-date with Active SPE Memory.
If the system was trying to enter Maintenance Mode, the refresh spe-standby
command aborts with the message, “Cannot interrupt Standby SPE while entering
maintenance mode; please try later.”
!
WARNING:
Because of its power to preempt Standby SPE maintenance activities, the
refresh spe-standby command should be used judiciously. If the Standby
SPE is in Maintenance Mode when the “refresh spe-standby” command is
issued, the maintenance activity that is being conducted by the Standby
SPE is immediately terminated.