Dell PowerVault MD3000i Command Line Interface Guide - Page 59
Assigning Global Hot Spares, virtualDiskName1
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• Initialization • Changing segment size • Defragmentation of a disk group • Adding free capacity to a disk group • Changing the RAID level of a disk group The lowest priority rate favors system performance, but the modification operation takes longer. The highest priority rate favors the modification operation, but the system performance might be degraded. The set virtualDisk command enables you to define the modification priority for a virtual disk. The following syntax is the general form of the command: set (allVirtualDisks | virtualDisk [virtualDiskName] | virtualDisks [virtualDiskName1 ... virtualDiskNamen] | virtualDisk | accessVirtualDisk) modificationPriority=(highest | high | medium | low | lowest) The following example shows how to use this command to set the modification priority for virtual disks named Engineering 1 and Engineering 2: client>smcli 123.45.67.89 -c "set virtualDisks [\"Engineering_1\" \"Engineering_2\"] modificationPriority=lowest;" The modification rate is set to lowest so that system performance is not significantly reduced by modification operations. Assigning Global Hot Spares Hot spare physical disks can replace any failed physical disk in the storage array. The hot spare must be the same type of physical disk as the physical disk that failed and must have capacity greater than or equal to any physical disk that can fail. If a hot spare is smaller than a failed physical disk, the hot spare cannot be used to rebuild the data from the failed physical disk. Hot spares are available only for RAID levels 1 or 5. Configuring a Storage Array 59