Dell PowerVault MD3620i Owner's Manual - Page 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 databaseapplication 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. Configuration: About Your Storage Array 75