Dell PowerVault MD3220 Owner's Manual page 47

the MD3200 array does not recognize the migrating metadata and that data is
lost. In this case, the MD3200 initializes the physical disks and mark them as
unconfigured capacity.
NOTE:
Only disk groups and associated virtual disks with all member physical disks
present can be migrated from one storage array to another. it is recommended that
you only migrate disk groups that have all their associated member virtual disks in
an optimal state.
NOTE:
The number of physical disks and virtual disks that a storage array supports
limits the scope of the migration.
Use either of the following methods to move disk groups and virtual disks:
• Hot virtual disk migration—Disk migration with the destination storage
array power turned on.
• Cold virtual disk migration—Disk migration with the destination storage
array power turned off.
NOTE:
To ensure that the migrating disk groups and virtual disks are correctly
recognized when the target storage array has an existing physical disk, use hot
virtual disk migration.
When attempting virtual disk migration, follow these recommendations:
• Moving physical disks to the destination array for migration—When
inserting drives into the destination storage array during hot virtual disk
migration, wait for the inserted physical disk to be displayed in MDSM
before inserting the next physical disk.
WARNING:
can become unstable and manageability is temporarily lost.
• Migrating virtual disks from multiple storage arrays into a single storage
array—When migrating virtual disks from multiple or different storage
arrays into a single destination storage array, move all of the physical disks
from the same storage array as a set into the new destination storage array.
Ensure that all of the physical disks from a storage array are migrated to
the destination storage array before starting migration from the next
storage array.
NOTE:
array, the newly relocated disk groups might not be accessible.
Planning: MD3200 Series Storage Array Terms and Concepts
Without the delay between drive insertions, the storage array
If the drive modules are not moved as a set to the destination storage
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