• Change or delete logical unit number (LUN) mappings on a virtual disk holding a reservation.• Delete virtual disk groups or virtual disks that have any reservations.To determine which virtual disks have reservations, run the following command:show (allVirtualDisks | virtualDisk[virtualDiskName] | virtualDisks [virtualDiskName1... virtualDiskNameN]) reservationsTo clear persistent virtual disk reservations, run the following command:clear (allVirtualDisks |virtualDisk[virtualDiskName] | virtualDisks[virtualDiskName1" ... "virtualDiskNameN])reservationsSynchronizing RAID Controller Module ClocksTo synchronize the clocks on both RAID controller modules in a storage array with the host clock, runthe following command:set storageArray timeLocating Physical DisksAt times, you might need to locate a specific physical disk. In very large storage array configurations, thiscan sometimes be awkward. If you need to locate a specific physical disk, turn on the indicator LED onthe front of the physical disk. To turn on the indicator LED on a physical disk, run the followingcommand:Performance TuningOver time, as a storage array exchanges data between the hosts and physical disks, its performance candegrade. Monitor the performance of a storage array and make adjustments to the storage arrayoperational settings to improve performance.Monitoring PerformanceMonitor the performance of a storage array by using the save storageArray performanceStatscommand. This command saves performance information to a file that you can review to determine howwell the storage array is running. The following table lists the performance information saved to the file.Table 14. Storage Array Performance InformationType of Information DescriptionDevices Devices are:RAID ControllerModulesThe RAID controller module in slot 0 or 1 and alist of the virtual disks owned by the RAIDcontroller module.Virtual Disk A list of the virtual disk names.Storage ArrayTotalsA list of the totals for both RAID controllermodules in an active-active RAID controller114
