Dell PowerVault MD3200 CLI Guide - Page 59

Assigning Global Hot Spares, set virtualDisk, Engineering 1, lowest, set physicalDisk, FALSE

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• 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. You can assign or unassign global hot spares by using the set physicalDisk command. To use this command, you must perform these steps: 1 Identify the location of the physical disks by enclosure ID and slot ID. 2 Set the hotSpare parameter to TRUE to enable the hot spare or FALSE to disable an existing hot spare. Configuring a Storage Array 59

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Configuring a Storage Array
59
•
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 <
wwid
> |
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.
You can assign or unassign global hot spares by using the
set physicalDisk
command. To use this command, you must perform these steps:
1
Identify the location of the physical disks by enclosure ID and slot ID.
2
Set
the
hotSpare
para
meter to
TRUE
to enable the hot spare or
FALSE
to
disable an existing hot spare.