DELL MD3220 사용자 설명서

Planning: MD3200 Series Storage Array Terms and Concepts

• Segment size migration
• Disk group expansion
• Disk group defragmentation.

The priority of each of these operations can be changed to address 

performance requirements of the environment in which the operations are to 

be executed.

Setting a high priority level impacts storage array performance. It is not 

advisable to set priority levels at the maximum level. Priority should also be 

assessed in terms of impact to host server access and time to complete an 

operation. For example, the longer a rebuild of a degraded virtual disk takes, the 

greater the risk for potential secondary disk failure.

Virtual disk migration is moving a virtual disk or a hot spare from one array to 

another by detaching the physical disks and re-attaching them to the new 

array. Disk roaming is moving a physical disk from one slot to another on the 

same array.

You can move virtual disks from one array to another without taking the 

target array offline. However, the disk group being migrated must be offline 

prior to performing the disk migration. If the disk group is not offline prior to 

migration, the source array holding the physical and virtual disks within the 

disk group marks them as missing. However, the disk groups themselves 

migrate to the target array.
An array can import a virtual disk only if it is in an optimal state. You can 

move virtual disks that are part of a disk group only if all members of the disk 

group are being migrated. The virtual disks automatically become available 

after the target array has finished importing all the disks in the disk group.
When you migrate a physical disk or a disk group from one MD3200 array to 

another, the MD3200 array you migrate to, recognizes any data structures 

and/or metadata you had in place on the migrating MD3200 array. However, if 

you are migrating from any device other than a MD3200 Series Storage Array, 

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