DELL MD3220 User Manual

Planning: MD3200 Series Storage Array Terms and Concepts

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:

Without the delay between drive insertions, the storage array

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:

If the drive modules are not moved as a set to the destination storage

array, the newly relocated disk groups might not be accessible.

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