HP Command View EVA Software - Manual (Page 33)

Considerations
•
To access storage on a storage system, you must explicitly add a host using HP P6000
Command View or HP Storage System Scripting Utility.
•
A host does not have to be online to be added. After it is added, the host must be online and
connected to the fabric or bridge to perform I/O to the storage system.
•
You can add a host by specifying an IP address (IPv4 or IPv6), a fully qualified domain name
(FQDN), or a host alias.
•
If you attempt to add a host without providing an IP address, a confirmation window opens.
•
You can define the number of host ports and other parameters in HP P6000 Command View
after the host is added.
•
For all Windows 2012 hosts, HP recommends using Microsoft Windows 2012 host mode
when creating a host.
Presentation
Presentation is the act of making a virtual disk known to a host so that I/O to the disk can occur.
When a virtual disk is unpresented from a host, I/O with the disk can no longer occur.
Guidelines
•
A virtual disk must be completely created before you can present it to a host.
•
For a fully provisioned virtual disk in the range of 100 GB or larger, creation can take from
10 minutes to several hours before it can be presented.
•
It is possible to create and present a virtual disk in a single step; however, HP recommends
that you create a virtual disk first, then present it after it is created. This leaves HP P6000
Command View free to perform other tasks.
IMPORTANT: If you present a virtual disk as part of virtual disk creation step, HP P6000
Command View will be unresponsive until the virtual disk has been completely created and
presented.
•
You can present the virtual disk to an FC host, an iSCSI host, or an FCoE host.
NOTE: Presenting the same virtual disk to different types of hosts, such as an FC host, an
iSCSI host or an FCoE host, is not supported.
A warning message appears when a user tries to present a virtual disk to more than one type
of host.
Online virtual disk migration
XCS 10000000 or later controller software supports online virtual disk migration, which allows
you to change the Vraid of the virtual disk, move a virtual disk from one disk group to another, or
do both in a single action, without impacting host I/O.
When a virtual disk is migrated, the storage system creates a mirrorclone of the virtual disk and
performs an online mirrorclone migration. This underlying operation is invisible to users and to the
presented hosts.
The online virtual disk migration features are part of the HP P6000 Business Copy license. Migrations
can occur only if a valid instant-on or permanent HP P6000 Business Copy license is present.
For more information, see the online help.
Presentation 33