Partnerships among the replication and storage layer systems are
limited by these rules:
- Storage layer systems can be used as external storage only by
replication layer systems.
- Replication layer systems can participate in Metro Mirror or Global Mirror partnerships only with other replication layer systems.
- Storage layer systems can participate in Metro Mirror or Global Mirror partnerships only with other storage layer systems.
Tasks to configure the storage layer system
To configure a system as a storage layer, follow these general
tasks:
- On the storage layer system, first define a host object and add
all worldwide port names (WWPNs) from the Lenovo Storage V series system
to it.
- On the storage layer system, create host mappings between each
volume that you want to manage by using Lenovo Storage V series and
the host object that you created.
The volumes that are presented by the storage layer system appear
in the
Lenovo Storage V series managed disk (MDisk) view. The storage layer system appears
in the
Lenovo Storage V series view with a vendor ID of IBM.
Quorum disks on storage layer storage systems
The storage layer systems support quorum disks. Clustered
systems that have a storage level system can choose MDisks that
are presented by a storage level system as quorum disks.
Advanced functions for storage
layer systems
Replication layer systems can use storage
that is presented by the storage layer system, but Metro Mirror and Global Mirror cannot interoperate between the two systems. Replication
layer systems can participate in Metro Mirror and Global Mirror partnerships only with other replication layer systems.
Storage layer systems can participate in Metro Mirror and Global Mirror partnerships only with other storage layers.
For
more information, see Metro Mirror and Global Mirror partnerships information.
Volumes that are defined
on a storage layer system can be used by the replication layer system
as a source or target for advanced copy functions. Advanced copy functions
include FlashCopy®, Metro Mirror, and Global Mirror.Flex System V7000 Storage Node, IBM Storwize® V7000 for Lenovo, or Storwize® V7000 Unified advanced copy functions are not supported for volumes that are used
as MDisks.
Sharing the storage layer system between a host
and the Lenovo Storage V series system
A Flex System V7000 Storage Node, IBM Storwize® V7000 for Lenovo, or Storwize® V7000 Unified system can present some volumes to the Lenovo Storage V series system
and other volumes to hosts on the SAN. However, an individual
volume cannot be presented to both the Lenovo Storage V series system
and a host simultaneously.
SAN zoning for storage layer systems
If
many storage layer systems are managed by a single
Lenovo Storage V series,
be aware of the published limit for maximum
Flex System V7000 Storage Node,
IBM Storwize® V7000 for Lenovo, or
Storwize® V7000 Unifiedstorage systems per fabric. If the limit is exceeded by as little as a single
storage system, divide the storage layer systems into multiple zones.
Replication layer Flex System V7000 Storage Node, IBM Storwize® V7000 for Lenovo, or Storwize® V7000 Unified systems count toward the maximum number of Lenovo Storage V series nodes
that might be present within a single SAN zone. For more information,
see the following websites: