Complete this task to create open systems volume groups and to
specify their properties and parameters.
Volume groups provide a volume masking function. When you
create a volume, you can assign it to one or more volume groups. Open systems
server attachments are assigned to volume groups to control access to the
volumes. There can be up to 8320 volume groups. Any host port (or host port
group) can access only one volume group. A volume group can be accessed by
multiple servers if they have the same block size and address. If there is
a requirement for volume sharing, for example in a clustering environment,
then a volume can be a member of multiple volume groups, or multiple servers
can be in the same volume group. In both cases, data integrity is the responsibility
of host software.
To create open systems volume groups, perform the following steps:
- In the navigation, select . On
the Volume groups main page, in the Select storage unit drop-down
list, select a storage
unit.
- From the Select Action list, select Create..., and then click Go. The
Create Volume Group – Define volume group properties page is displayed.
- Define the properties. In the Nickname field,
you can either keep or modify the default nickname. In Accessed
by host types, select the appropriate host type. All other valid
compatible host types will be automatically selected. Both the Nickname and Accessed
by host types fields are required. After you define the properties,
click Next. The Create Volume Group – Select
host attachments page is displayed.
- In Create Volume Group – Select host attachments page, you can
optionally select the host attachment for the specified volumes. After selecting
the host attachment, click Next. The
Create Volume Group – Select volumes for groups page is displayed.
Note: If there
are no host attachments available for selection, you can create one by clicking
the Create new host attachment button. When you have
finished creating a host attachment, you will be returned to this page, and
the host attachment that you created will be available for selection.
- Select the volumes for the volume group. At least one volume must
be selected in the table. The volumes listed should be compatible with the
host types selected in the previous two pages. After selecting the volumes
for the volume group, click Next. The Create
Volume Group – Verification page is displayed.
Note: If there are no volumes
available for selection, you can create one by clicking the Create
new open systems volume button. When you have finished creating
a volume, you will be returned to this page, and the volume that you created
will be available for selection.
Tip: If you created volumes
with the same nickname prefix, you can change the view to show only those
volumes that you want to select either by sorting the nickname column or by
creating a filter.
- Use the Create Volume Group – Verification page to review the attributes
and verify that they are correct. If the attributes and values are not correct,
click Back as appropriate to return and to specify
the correct values. Otherwise, click Finish to complete
the volume group creation process.