CLI Guide

Table Of Contents

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.

Minimum role manage

Syntax

set expander-fault-isolation

[controller a|b|both]

enabled|disabled|on|off

[encl enclosure-ID]

[wwn enclosure-wwn]

Parameters

[controller a|b|both]

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

B, or both. If this parameter is omitted, the setting is changed in both I/O modules.

enabled|disabled|on|off

Specifies whether to enable or disable PHY fault isolation.

[encl enclosure-ID]

Optional. The enclosure ID of the enclosure containing the PHY. Specify either this parameter or the

wwn parameter.

[wwn enclosure-wwn]

Optional. The WWN of the enclosure containing the PHY. Specify either this parameter or the encl

parameter.

Examples Disable PHY fault isolation for Expander Controller A in enclosure 1.

# set expander-fault-isolation encl 1 controller a disabled

Re-enable PHY fault isolation for Expander Controller A in enclosure 1.

# set expander-fault-isolation encl 1 controller a enabled