IBM DS8882F, Introduction And Planning Manual

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z/OS Distributed Data Backup
z/OS Distributed Data Backup (zDDB) allows hosts, which are attached through a
FICON interface, to access data on fixed block (FB) volumes through a device
address on FICON interfaces.
If the zDDB LIC feature key is installed and enabled and a volume group type
specifies either FICON interfaces, this volume group has implicit access to all FB
logical volumes that are configured in addition to all CKD volumes specified in the
volume group. In addition, this optional feature enables data backup of open
systems from distributed server platforms through a IBM Z host. The feature helps
you manage multiple data protection environments and consolidate those into one
environment that is managed by IBM Z. For more information, see “z/OS
Distributed Data Backup” on page 84.
z/HPF extended distance
z/HPF extended distance reduces the impact that is associated with supported
commands on current adapter hardware, improving FICON throughput on the I/O
ports. The storage system also supports the new zHPF I/O commands for
multitrack I/O operations.
Copy Services
Copy Services functions can help you implement storage solutions to keep your
business running 24 hours a day, 7 days a week. Copy Services include a set of
disaster recovery, data migration, and data duplication functions.
The storage system supports Copy Service functions that contribute to the
protection of your data. These functions are also supported on the IBM
TotalStorage Enterprise Storage Server
®
.
Notes:
v If you are creating paths from a DS8882F 4-port host adapter to a previous
release DS8000 (Release 6.0 or later), which supports 8-port host adapters, you
can only connect the lower four ports of the 8-port host adapter.
v The maximum number of FlashCopy relationships that are allowed on a volume
is 65534. If that number is exceeded, the FlashCopy operation fails.
v
The size limit for volumes or extents in a Copy Service relationship is 2 TB.
v Thin provisioning functions in open-system environments are supported for the
following Copy Services functions:
– FlashCopy relationships
– Global Mirror relationships if the Global Copy A and B volumes are Extent
Space Efficient (ESE) volumes. The FlashCopy target volume (Volume C) in
the Global Mirror relationship can be an ESE volume or standard volume.
v PPRC supports any intermix of T10-protected or standard volumes. FlashCopy
does not support intermix.
v PPRC supports copying from standard volumes to ESE volumes, or ESE
volumes to Standard volumes, to allow migration with PPRC failover when both
source and target volumes are on a DS8000 version 8.2 or higher.
The following Copy Services functions are available as optional features:
v Point-in-time copy, which includes IBM FlashCopy.
Chapter 3. Data management features
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