190 Implementing the IBM Storwize V5000 Gen2 with IBM Spectrum Virtualize V8.1
Modify tier
Selecting Modify Tier allows the user to modify the tier to which the external MDisk is
assigned, as shown in Figure 4-63. This setting is adjustable because the system cannot
detect the tiers associated with external storage automatically. Enterprise Disk (Tier 2) is the
option selected by default.
Figure 4-63 Modifying external MDisk tier
This option is available only when encryption is enabled. Selecting Modify Encryption allows
the user to modify the encryption setting for the MDisk, as shown in Figure 4-64 on page 191.
For example, if the external MDisk is already encrypted by the external storage system,
change the encryption state of the MDisk to Externally encrypted. This stops the system
from encrypting the MDisk again if the MDisk is part of an encrypted storage pool.
Important: If you need to preserve existing data on an unmanaged MDisk do not assign it
to a storage pool because this action
deletes the data on the MDisk. Use Import instead.
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