Chapter 10. Advanced features for storage efficiency 425
tier_capacity 0.00MB
tier_free_capacity 0.00MB
tier tier1_flash
tier_mdisk_count 1
tier_capacity 8.64TB
tier_free_capacity 7.78TB
tier tier_enterprise
tier_mdisk_count 0
tier_capacity 0.00MB
tier_free_capacity 0.00MB
tier tier_nearline
tier_mdisk_count 0
tier_capacity 0.00MB
tier_free_capacity 0.00MB
<...>
compression_active no
compression_virtual_capacity 0.00MB
compression_compressed_capacity 0.00MB
compression_uncompressed_capacity 0.00MB
<...>
data_reduction yes
used_capacity_before_reduction 1.30TB
used_capacity_after_reduction 793.38GB
overhead_capacity 89.00GB
deduplication_capacity_saving 10.80GB
reclaimable_capacity 0.00MB
physical_capacity 8.64TB
physical_free_capacity 7.78TB
shared_resources no
The output reports real capacity that is used on each of the storage tiers. Deduplication 
savings are also shown. That compression-related values show 0 MB because they belong to 
RtC (standard pool) compression.
For more information about every reported value, see lBM Knowledge Center.
Migrating to and from DRP
Although data can be migrated regardless of the nature of the new volumes, the type of these 
volumes determines which of the following migration strategies is:
/SM590000Migration strategy for any source volume on a standard pool to thin or compressed volume 
on DRP.
If you need to migrate a fully allocated, thin-provisioned, or compressed volume from a 
standard pool to a fully allocated, thin-provisioned, or compressed volume in a DRP pool, 
create a second volume copy. 
To create a second copy, right-click the source volume and choose Add Volume Copy, as 
shown in Figure 10-14 on page 426. Choose target DRP for the second copy and 
Capacity savings type, None, Thin-provisioned, or Compressed. 
You can select Deduplicated only if there are no RtC compressed volumes in your I/O 
group.
After you click Add, synchronization starts. The time synchronization takes to complete 
depends on the size of the volume and system performance.