Administrator Guide

redundancy mode is shown as Active-Active ULP. ULP uses the T10 Technical Committee of INCITS Asymmetric Logical Unit Access
(ALUA) extensions, in SPC-3, to negotiate paths with aware host systems. Unaware host systems see all paths as being equal.
If a host group or host is mapped to a volume or volume group, all of the initiators within that group will have an individual map to each
volume that makes up the request. As long as the group entity is mapped consistently, that set of individual maps will be represented as a
grouped mapping. If any individual map within that group is modified, the grouped mapping will no longer be consistent, and it will no longer
appear in the PowerVault Manager. It will be replaced in the PowerVault Manager with all of the individual maps.
CAUTION: Volume mapping changes take effect immediately. Make changes that limit access to volumes when the
volumes are not in use. Before changing a LUN, be sure to unmount the volume.
NOTE: The secondary volume of a replication set cannot be mapped. Create a snapshot of the secondary volume or
volume group and use the snapshot for mapping and accessing data.
Map initiators and volumes
1. Perform one of the following:
• In the Hosts topic, select the initiators to map and select Action > Map Initiators.
• In the Volumes topic, select the volumes to map and select Action > Map Volumes.
• In the Mapping topic, select Map to create a new mapping.
• In the Mapping topic, select one or more mappings to modify or delete and select Action > Map. You can also create a new
mapping.
The Map panel opens and shows two tables side-by-side that list available initiators and volumes. You can use these tables to create
mappings. There is also a table underneath the host and volume tables that lists mappings. After you create a mapping and before you
save it, the mapping appears in the mappings table and you can modify its settings or delete it.
The Available Host Groups, Hosts, and Initiators table shows one or more of the following rows:
Table 23. Available host groups, hosts, and initiators
Row description Group Host Nickname ID
A row with these values
always appears. Select
this row to apply map
settings to all initiators
and create a default
mapping.
- - (blank) All Other
Initiators
A row with these values
appears for an initiator
that is grouped into a
host. Select this row to
apply map settings to all
initiators in this host.
- host-name * *
A row with these values
appears for an initiator
that is grouped into a
host group. Select this
row to apply map
settings to all initiators in
this host group.
host-group-name * * *
A row with these values
appears for each
initiator. Select this row
to apply map settings to
this initiator.
- or host -
host-group-name
- or
host-name
(blank) or
initiator-nick
name
initiator-ID
The Available Volume Groups and Volumes table shows one or more of the following rows:
108
Working in the Mappings topic