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Configuration: About Your Storage Array 75
Displaying Failover Alert
You can change the failover alert delay for a storage array. The failover alert
delay lets you delay the logging of a critical event if the multi-path driver
transfers virtual disks to the non-preferred controller. If the multi-path driver
transfers the virtual disks back to the preferred controller within the specified
delay period, a critical event is not logged. If the transfer exceeds this delay
period, then a virtual disk-not-on-preferred-path alert is issued as a critical
event. You can also use this option to minimize multiple alerts when more
than one virtual disk fails over because of a system error, such as a failed host
adapter.
For more information, see the PowerVault Modular Disk Storage Manager
online help topics.
Changing the Cache Settings on the Storage Array
To change the storage array cache settings:
1
In the AMW, select
Storage Array
Change
Cache Settings
.
The
Change Cache Settings
window is displayed.
2
Select or enter the percentage of unwritten data in the cache to trigger a
cache flush in
Start flushing
.
3
Select or enter the percentage of unwritten data in the cache to stop a
cache flush in progress in
Stop flushing
.
4
Select the appropriate
Cache block size
.
A smaller cache size is a good choice for file-system use or database-
application use. A larger cache size is a good choice for applications that
generate sequential I/O, such as multimedia.
5
In the
Enter Password
dialog, type the current password for the storage
array, and click
OK
.
book.book Page 75 Thursday, December 9, 2010 3:20 PM