Chapter 9. Administration - Logical Tab 257
Draft Document for Review March 28, 2011 12:24 pm 7914Admin_Logical.fm
Figure 9-33 Segment Size warning
3. Select Yes and the Logical Drive starts to be modified. You can see the clock icon on it
and progress bar in the Properties pane.
9.5.7 Increase Capacity
It is also possible to increase the size of Logical Drive. This action is called Dynamic Volume
Expansion
(DVE). The capacity of standard logical drives and FlashCopy repository logical
drives can be increased using one or both of the following capacities:
Free capacity available on the array
Unconfigured capacity (in the form of unused drives) on the storage subsystem
The operating systems that support a dynamic increase of capacity in a mapped logical drive
are:
AIX
Linux
NetWare
Solaris
Windows Dynamic Disks
Windows Basic Disks
Note: Segment size change is long term process, which also can have influence on IO
operations of attached hosts. The process cannot be stopped. If you can change segment
size in multiplies of four or more, you must do it in more steps. Sometimes it can be faster
to delete the Logical Drive and create it with required segment size as a new one.
Note: Storage Manager provides support for logical drives greater than 2 TB. This
improves the capacity requirement for applications that requires large capacity logical
drives.
Note: Increasing the capacity of a standard logical drive is only supported on certain
operating systems. If the logical drive capacity is increased on a host operating system that
is not supported, the expanded capacity will be unusable and the original logical drive
capacity will not be able to be restored.
Tip: If a Logical Drive-to-LUN mapping has not yet been defined, it is possible to increase
the capacity for a standard logical drive on any host operating system, as logical drive is
not formatted yet in operating system.
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