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HP StorageWorks 2300 Modular Smart Array CLI reference guide 89

set expander-fault-isolation

Description This command is for use by or with direction from a service technician.

By default, the Expander Controller in each I/O module performs fault-isolation analysis of SAS

expander PHY statistics. When one or more error counters for a specific PHY exceed the built-in

thresholds, the PHY is disabled to maintain storage system operation.

While troubleshooting a storage system problem, a service technician can use this command to

temporarily disable fault isolation for a specific Expander Controller in a specific enclosure.

NOTE: If fault isolation is disabled, be sure to re-enable it before placing the system back into

service. Serious problems can result if fault isolation is disabled and a PHY failure occurs.

Syntax

set expander-fault-isolation wwn enclosure-wwn controller a|b|both

enable|disable

Parameters wwn enclosure-wwn

The WWPN of the enclosure containing the Expander Controller whose setting you want to change.

To determine the WWPN, use show enclosure-status.

controller a|b|both

The I/O module containing the Expander Controller whose setting you want to change: A, B, or

both.

enable|disable

Whether to enable or disable PHY fault isolation.

Example Disable PHY fault isolation for Expander Controller A in an enclosure:

# set expander-fault-isolation wwn 500C0FF00A408A3C controller a disable

Success: Disabled expander fault isolation.

Re-enable PHY fault isolation for Expander Controller A in the same enclosure:

# set expander-fault-isolation wwn 500C0FF00A408A3C controller a enable

Success: Enabled expander fault isolation.

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