Chapter 4. IBM System Storage DS planning and configuration 255
To locate this setting, highlight the logical drive in the Storage Manager menu and select
Storage Subsystem ï‚® Change ï‚® Media Scan Settings. The window shown in
Figure 4-115 opens.
Figure 4-115 Media scan settings for storage subsystem
4.10.8 Failover alert delay
Storage Manager provides alert notification on ADT-induced logical drive ownership changes.
The logical drive transfer alert notification is issued for any instance of a logical drive owned
by a non-preferred controller, whether ADT is enabled or not, and is in addition to any
informational or critical event already logged within the ADT or RDAC context.
A failover alert delay can be specified that lets you delay the logging of a critical event if the
multipath driver transfers logical drives to the non-preferred controller. If the multipath driver
transfers the logical drives back to the preferred controller within the specified delay period,
no critical event is logged. If the transfer exceeds this delay period, then a logical
drive-not-on-preferred-path alert is issued as a critical event. This option also can be used to
minimize multiple alerts when many logical drives fail over because of a system error, such as
a failed host adapter.
Attention: Whenever a logical drive not-on-preferred-path condition occurs, only the alert
notification is delayed. A needs attention condition is raised immediately.
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