Hitachi Command Suite 8 User Guide

							In the illustration below, multiple file system sub-directories have been
created using a single file system, and shared (specified as an export point).
Related concepts
•
About managing Hitachi NAS Platform file systems and shares  on page 231
•
About managing Hitachi NAS Platform F and Hitachi Data Ingestor file
systems and shares  on page 254
Related tasks
•
Adding NAS Platform file shares  on page 251
•
Creating HNAS F or HDI file systems (HFSM v3.2 or later)  on page 257
•
Creating HDI file systems (HFSM v3.1)  on page 258
Provisioning storage261Hitachi Command Suite User Guide 
						

							Related references
•
Workflow for providing NAS Platform file shares  on page 234
•
Workflow for providing HNAS F and HDI file shares (HFSM)  on page 255
262Provisioning storageHitachi Command Suite User Guide 
						

							6
Managing virtual storage machinesVirtual storage machines are used to achieve continuous access to data for
global-active device volumes and for data migration.
□
About virtual storage machines
□
Prerequisites for allocating resources to virtual storage machines
□
Creating virtual storage machines
□
Allocating volumes to hosts by using virtual storage machine resources
□
Editing virtual storage machines
□
Deleting virtual storage machines
Managing virtual storage machines263Hitachi Command Suite User Guide 
						

							About virtual storage machinesGlobal storage virtualization provides an abstraction layer between opensystems hosts and storage systems. This layer enables non-disruptive
storage management, such as:
• Non-disruptive host access to global-active device volumes which consist of a P-VOL and an S-VOL that reside on different storage systems.
• Non-disruptive host volume data migration from a source volume on an existing storage system to a target volume on a new storage system.
The features described above are accomplished through the use of virtual
storage machines.
There are two types of virtual storage machines within the VSP G1000 storage system:
• Default virtual storage machine One default virtual storage machine is created by default. The virtual
information for the default virtual storage machine uses the same values
as the physical information. Initially, all resources added to user-defined
virtual storage machines are allocated from the default storage machine.
Allocated resources are stored in the automatically created resource group (resource pool) when the virtual storage machine is created.
• User-defined virtual storage machines You can have a maximum of eight virtual storage machines for a singleVSP G1000. This maximum includes the default virtual storage machine
and seven user-defined virtual storage machines. Resources in the resource pools of user-defined virtual storage machines are added and removed by editing the virtual storage machines.
Virtual storage machine resources and resource groups
The following resources can be added and grouped by system resource type to the virtual storage machine:
• Parity groups
• LDEV IDs • Storage ports
• Host group numbers
User-defined resource groups defining more specific storage access can be
created for the VSP G1000. You create a resource group on a virtual storage
machine by allocating resources from the resource pool. You can check the resource pools on separately created virtual storage machines from the resource group list.
The following figure shows an example configuration of a virtual storage
machine.
264Managing virtual storage machinesHitachi Command Suite User Guide 
						

							In the example configuration, the virtual storage machine is created usingthe model type and serial number of the Virtual Storage Platform G1000. Resources from the resource pool of the default virtual storage machine are
added to the user-defined virtual storage machine. The resources are added to the VSP-11111-Pool resource pool. When Resource Group B is created on
the virtual storage machine, resources from the VSP-11111-Pool are added.
Identify the target resources by verifying the correlation between the virtual information that was sent from the host administrator and the physical
information. You can name a virtual storage machine relative to how the
virtual storage machine is being used.
Global-active device using virtual storage machines Global-active device employs volume replication (P-VOL and S-VOL in a
bidirectional copy pair) to provide a high availability environment for hosts across storage systems and sites. The purpose of global-active device is to
provide data protection and minimize data access disruptions for host applications due to storage system or site failures, as illustrated by the
following figure.
Managing virtual storage machines265Hitachi Command Suite User Guide 
						

							1.Hosts use the SCSI Inquiry command to determine storage and device
information for accessing volumes.
2. Host I/O is performed with this information.
3. During global-active device setup, the default virtual storage machine of
the Primary storage is edited to include secondary storage system
resources.
4. During volume allocation global-active device copy pairs are created and
the virtual LDEV ID is mapped to the LDEV ID of the S-VOL. The virtual
storage machine information is used to support data replication from P- VOL to S-VOL for the global-active device copy pair.
5. If the P-VOL becomes unavailable, the host accesses the S-VOL without
disruption.
Data migration using virtual storage machines For data migration using virtual storage machines, you cannot access the
resources until all of the source resource data has been migrated to the
destination, even if the virtual information for these resources is displayed.
266Managing virtual storage machinesHitachi Command Suite User Guide 
						

							During the three stages of data migration, accessing the information changesfrom using physical to virtual information.
• Before data migration (using physical information) Before data migration, a host uses physical information to access the
migration-source resources.
• During data migration The path from the host to the storage system is changed from themigration source to the migration destination. Configure virtual
information on the migration-destination resource, and then migrate the data from the migration-source resource. Changes to the resource group
to which the volume belongs cannot be assigned until data migration is
complete.
• After data migration (using virtual information) After all of the source resources are migrated to the destination, you can
assign resources or allocate volumes to virtual storage machines. Then the
host can now use virtual information to access the resources on the
migration-destination storage system. For example, when a Virtual Storage
Platform is replaced by a VSP G1000 and the information in Virtual Storage Platform is configured on a virtual storage machine, configuration changes
are not needed. The host can view and access the volumes on the VSP
G1000 virtual storage machine in the same way that the volumes were
accessed on the Virtual Storage Platform.
For resources that have virtual information configured after data migration: • User-defined virtual storage machine volumes cannot be allocated to a file server.
Managing virtual storage machines267Hitachi Command Suite User Guide 
						

							• To manage copy pairs, such as global-active device pairs by using theresources of a virtual storage machine, review the prerequisites for systemconfiguration. For details, see the  Hitachi Command Suite Administrator
Guide .
Related concepts
•
About resource groups  on page 97
•
About global-active device  on page 276
Related tasks
•
Creating virtual storage machines  on page 269
•
Editing virtual storage machines  on page 271
•
Deleting virtual storage machines  on page 273
Related references
•
Prerequisites for allocating resources to virtual storage machines  on page
268
•
Prerequisites for creating resource groups  on page 99
Prerequisites for allocating resources to virtual storage
machines
The following list identifies the conditions for resource allocation to virtual
storage machines.
The following resources can be allocated to a virtual storage machine for a Virtual Storage Platform G1000.
• Parity Groups: Includes parity groups in external storage systems. When you register a part of a parity group that is part of a concatenated paritygroup to a virtual storage machine, other parity groups that are a part of
the concatenated parity group will also be registered in the same virtual storage machine automatically.
• LDEV IDs: Includes volumes in external storage systems. LDEV IDs can be added only if they are not allocated to a host and do not have virtual
information. Non-existent IDs can also be specified.
• Storage Ports: Includes storage system ports. • Host Group Numbers: Host group numbers can be added only if they are not allocated to a host and do not have virtual information. Non-existent
numbers can also be specified.
Note the following additional conditions: • If the LDEV ID of a DP volume is registered to a virtual storage machine, you can also view the DP pool to which the DP volume belongs and the DPpool volumes that compose the DP pool.
268Managing virtual storage machinesHitachi Command Suite User Guide 
						

							• If a DP pool volume is registered to a virtual storage machine, othervolumes that compose the DP pool are automatically registered to the
same virtual storage machine.
Related concepts •
About virtual storage machines  on page 264
Related tasks
•
Creating virtual storage machines  on page 269
•
Editing virtual storage machines  on page 271
Creating virtual storage machines You can create a maximum of seven virtual storage machines for a single VSPG1000. Resources specified, such as parity groups or LDEV IDs, are added to
the resource pools on the user-defined virtual storage machines.
Prerequisites
Serial number, if you are specifying a storage system that is not registered with HCS.
Procedure 1. On the  Administration  tab, select Virtual Storage Machine .
2. In the application pane, click  Create Virtual Storage Machine .
3. Enter a name for the virtual storage machine.
4. Choose one of the following options to specify the virtual model and
serial number.
• Click  Select a storage system already registered on HCS from
list .
• Click  Specify manually , select a model from the list, and then specify
a virtual serial number.
5. On the  Storage Systems  tab, click Add Storage Systems , and then
select the storage system to add.
Displays the storage system and the resources in the storage system
that can be added to the virtual storage machine. Resources are organized by resource type, such as parity groups, LDEV IDs, storageports, and host group numbers.
6. (Optional) On the  Parity Groups tab, click Add Parity Groups , select
the parity groups from the list, and then click  OK.
7. (Optional) On the  LDEV IDs tab, click Add LDEV IDs , specify the
number of LDEV IDs or select available LDEV IDs to add from a table,
and then click  OK.
8. (Optional) On the  Storage Ports tab, click Add Storage Ports , select
the storage ports to add, and then click  OK.
Managing virtual storage machines269Hitachi Command Suite User Guide 
						

							9.(Optional) On the  Host Group Numbers  tab, click Add Host Group
Numbers , specify storage ports and the number of host group numbers
to add per port, or specify host groups from a list, and then click  OK.
10. Click Submit.
If the task is scheduled to run immediately, the process begins.
11. (Optional) Check the progress and result of the task on the  Tasks &
Alerts  tab. Click the task name to view details of the task.
Result
The user-defined virtual storage machine is created and can be viewed in the list of virtual storage machines.
Related concepts
•
About virtual storage machines  on page 264
Related references
•
Prerequisites for allocating resources to virtual storage machines  on page
268
Allocating volumes to hosts by using virtual storage machine resources
The storage administrator can allocate volumes to hosts by using the
resources of a virtual storage machine. The volumes of the default virtual
storage machine can also be allocated. The default virtual storage machine is
created in VSP G1000.
Prerequisites
• Identify the name of the target host.
• The volumes to be allocated must satisfy one of the following conditions: ○The volumes must belong to the same virtual storage machine to which
the host group of the target host belongs.
○ The volume must belong to the resource pool of the default virtual
storage machine.
Procedure 1. On the  Resources  tab, select  Hosts.
2. Expand the tree and select an operating system.
3. Select one or more hosts and click  Allocate Volumes.
4. Select the  No. of Volumes  and enter the Volume Capacity .
5. From the list of storage systems, select the physical storage system.
6. From the list of virtual storage machines, select the virtual storage
machine that contains the volumes to be allocated.
270Managing virtual storage machinesHitachi Command Suite User Guide