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Chapter 5 Configuration Menu
> 5.3 Thin Provisioning Management
ETERNUS DX400/DX8000 series ETERNUSmgr User Guide Settings/Maintenance
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P2X0-0760-02ENZ0
4 Click the [OK] button.
→ Returns to the [Menu] screen.
End of procedure
5.3.12 Balance Thin Provisioning Volume
This function relocates the physical allocating area of the Thin Provisioning Volume (TPV) to
make the physical area of TPV is allocated equally among the RAID Groups that configure the
Thin Provisioning Pool (TPP).
When multiple TPVs in the same TPP are accessed, the physical area is allocated by using the
RAID Groups of the TPP one by one in the access order. Therefore the physical area of TPVs
may be unequally allocated among the RAID Groups. This phenomenon also occurs when
expanding the capacity of a TPP. In this case, the physical area is allocated unevenly among the
newly added and existing RAID Groups. The [Balance Thin Provisioning Volume] function is to
solve the unequal allocation among RAID Groups, and balance the physical allocating area in
each RAID Group. IO load is dispersed among the RAID Groups in the TPP and access perfor
-
mance may be improved.
■ Conditions for a TPV to be Balanced
• The volume type is [TPV]
• The [Status] is [Available]
• The TPV capacity is 8.0TB (8,388,608MB) or less
• RAID Migration is not being performed (the target volume is not specified as a migration
source or migration destination for the existing RAID Migration)
• An Advanced Copy is not being performed (the target volume is not specified as a copy
source or copy destination for the existing Advanced Copy)
• A Remote Advanced Copy is not being performed (the target volume is not specified as a
copy source or copy destination for the existing Remote Advanced Copy)
• Balancing of a TPV is not being performed