ABCs of z/OS System Programming Volume 3 - IBM Redbooks

3.13 Using dynamic volume expansion
More recently, Dynamic Volume Expansion is a
function (available at the IBM DS8000 console) that:
Figure 3-13 Using dynamic volume expansion
Using dynamic volume expansion
It is possible to grow an existing volume with the DS8000 with dynamic volume expansion
(DVE). Previously, it was necessary to use migration utilities that require an additional volume
for each volume that is being expanded and require the data to be moved.
A logical volume can be increased in size while the volume remains online to host systems for
the following types of volumes:
► 3390 model 3 to 3390 model 9
► 3390 model 9 to EAV volume sizes using z/OS V1R10
Dynamic volume expansion can be used to expand volumes beyond 65,520 cylinders
without moving data or causing an application outage.
Dynamic volume expansion is performed by the DS8000 Storage Manager and can be
requested using its Web GUI. 3390 volumes may be increased in size, for example from a
3390 model 3 to a model 9 or a model 9 to a model A (EAV). z/OS V1R11 introduces an
interface that can be used to make requests for dynamic volume expansion of a 3390 volume
on a DS8000 from the system.
Note: For the dynamic volume expansion function, volumes cannot be in Copy Services
relationships (point-in-time copy, FlashCopy SE, Metro Mirror, Global Mirror, Metro/Global
Mirror, and z/OS Global Mirror) during expansion.
76 ABCs of z/OS System Programming Volume 3
Increases the capacity of existing zSeries volumes
Requires a manual operation for the system
programmer to expand the VTOC size
3390 model 3 to 3390 model 9
3390 model 9 to EAV volume sizes using z/OS V1R10
Note: Volumes cannot be in Copy Services relationships
(point-in-time copy, FlashCopy SE, Metro Mirror, Global Mirror,
Metro/Global Mirror, and z/OS Global Mirror) during expansion.
All systems must be at the z/OS V1R10 level for the DVE feature
to be used when the systems are sharing the Release 4.0
Licensed Internal Microcode updated DS8000 at an LCU level.