Hitachi Command Suite 8 User Guide

							As you enter information in a dialog box, if the information is incorrect, errors
that include a description of the problem appear at the top of the box.
Table 5-5  Allocate Volumes dialog boxFieldSubfieldDescriptionHost-If you select one or more hosts (including virtualization
servers, or file servers) prior to clicking Allocate Volumes, the
host names are displayed. If you did not select hosts, you are
prompted to do so. The host drop-down list displays a single host, by name. Additionally, Select Hosts allows you to select
multiple hosts, and displays related details such as the OS and WWN. For example, you can select cluster hosts for volume
allocation.
The host drop-down list provides a special selection called
Allocate without LUN security. When you enter adequate
volume information, LUN Path Options expand to a list of storage ports with LUN security disabled. Select one or more
ports, and click Add to add them to the Selected Storage Ports
list as part of this dialog box. All hosts with LUN paths on the
selected storage port have access to the volumes on the ports.Allocation Type-To allocate global-active device pairs, select Global-Active
Device, which will display Primary/Secondary tabs for
configuring paired volumes. For all other volume allocations,
select Standard. Global-Active Device is not displayed if a
selected host is a file-server.No. of Volumes-Specify the number of volumes to allocate to the selected
hosts.
For global-active device, this is the number of volumes to become paired volumes and allocated to the selected hosts.Volume Capacity-Specify the volume size and select the unit of measure (for
example, GB represents Gigabytes).
The total capacity to be allocated (No. of Volumes * Capacity) is displayed.
Note:  You can create a new volume when volume criteria, such
as volume capacity, cannot be satisfied by existing volumes.
This is indicated in Advanced Options > Creating Volume
Settings > Advanced Options by formatting and stripe size options for the new volume.Storage system-If you select a storage system prior to clicking Allocate
Volumes, its name is displayed. Otherwise, select the storage system that is providing the volumes. Any storage system can
provide basic volumes.
Volumes to be allocated from DP pools must be provided by a storage system that supports this feature. Allocating volumes
from a tier requires configured tier policies for the storage
system.
The Any option means that the volume can be sourced from
any storage system that meets the criteria of the dialog box.Provisioning storage201Hitachi Command Suite User Guide 
						

							FieldSubfieldDescriptionFor global-active device, from the primary/secondary tabs, youmust select primary and secondary storage systems that have
been previously identified in the global-active device setup.Virtual Storage
Machine-This displays a list of one or more virtual storage machines
from which you can choose during volume allocation. The
virtual storage machines can also be viewed on the
Administration tab by selecting Virtual Storage Machine.
When allocating global-active device paired volumes, from the
primary/secondary tabs, you must select the virtual storage
machine to be used by both the primary and secondary storage
for access to virtualized resources. If the virtual storage
machine does not exist, it can be created during the global-
active device setup.Volume type-Select the volume type (for example, Basic Volume, Dynamic
Provisioning, or Dynamic Tiering). The displayed volume types
are determined based on your selected storage system. If you
do not see an expected volume type, check that you have selected the correct storage system.
The selected volume type affects the Advanced Options fields
described below. For example, selecting a Basic Volume will
populate Advanced Options > Volume Selection > Automatic
with a default drive type, drive speed, chip type, RAID level,
and parity group. These specifications may be altered. For example, if you change the drive speed, the parity group may
change automatically. These changes are determined by
available resources. You may also select an available tier from
which to allocate the volume, or manually locate available unallocated volumes.
If you select volume type Dynamic Provisioning, Advanced
Options > Volume Selection > Automatic, this populates with an HDP pool instead of a parity group (and the specifications
may be altered).
If you select Dynamic Tiering, the Volume Selection field
displays. Volume selection is either automatic or manual (see
the following section on the volume selection field).
The Any option means that the volume can be sourced from any available volume type that meets the capacity criteria, and
is available from the storage system.
For Hitachi NAS Platform family, basic volumes are displayed by
default. The Any selection is not displayed. If either HDP
(Dynamic Provisioning) or HDT (Dynamic Tiering) are selected,
you must manually select the volume to assign (see the
following Volume Selection, Manual option).
For global-active device, you must select HDP or HDT volumes.Volume location-Select Internal if you want your volume to come directly from
your selected storage system, or External if volumes are
mapped from external storage systems (virtualized volumes)
and are adequate for your needs. The external option can
appear for basic volumes and HDP pools. When viewing a list of
DP pools, the volume location column indicates whether it is
internal or external.202Provisioning storageHitachi Command Suite User Guide 
						

							FieldSubfieldDescriptionNote: This field is replaced by Volume Selection when Dynamic
Tiering is selected (see the previous Volume type section).Volume
Selection-This field displays only if Dynamic Tiering is selected (see
volume type above).
Note:  This field is not the same field as the Volume Selection
field defined in the following Advanced Options Group section.
Select Automatic to allow the system to configure volume
allocation space for you from available DP pools.
Select Automatic and click Select Pool to list the available DP
pools. Make an appropriate selection that corresponds to your
capacity requirements, and click OK. Verify that the name is
correctly displayed. When displayed under Advanced Options,
you can tailor the Tiering Policy Setting (see the following section). When you submit the task, a volume is created for
the host.
Select Manual to display the selected volumes list, select Add
Volumes,and select Unallocated Volumes or Allocated Volumes.
Choose an appropriate volume, click Add to update Selected
Volumes, and click OK to return to volume allocation.>> Advanced
Options(See the
following twelve
fields for
details)When you set the volume type to Basic Volume or Dynamic Provisioning, this displays the Tier, Automatic, and Manual options. When the volume type is Dynamic Tiering, the fields
display as explained in Volume Type.
The fields can be displayed or hidden when you click Advanced
Options. These fields support explicit volume allocation (Tier or
Manual) or volume allocation based on criteria such as drive
type, drive speed, chip type, or RAID level.Tiering Policy
Setting-Displays only if Dynamic Tiering is selected as the volume type,
and an HDT pool has been selected with Select Pool (see
previous Volume Selection section). You can select a specific tier policy for the volume to be allocated, or select All.New Page
Assignment Tier-For VSP G1000, VSP, and HUS VM, selecting this option
specifies to which hardware tier the new page of an HDT
volume is to be assigned with a specified priority. Within the
hardware tiers for which the tiering policy is set, specify  High
for an upper-level hardware tier,  Middle for a medium-level
hardware tier, and  Low for a low-level hardware tier.Relocation
Priority-For VSP G1000, VSP, and HUS VM, selecting this option
specifies whether you want to prioritize the relocation of the
data in HDT volumes.Volume
SelectionTierNote:  This field is not the same field as the Volume Selection
field that is defined when Volume Type is set to Dynamic
Tiering.
If your selected storage system is configured with storage tiers,
you can Select a Tier for volume allocation. If your selected
storage system was Any, you can see which storage systems
have tiers available using Select a Tier, and make a selection.AutomaticDevice Manager automatically selects volumes based on the
specified volume criteria.Provisioning storage203Hitachi Command Suite User Guide 
						

							FieldSubfieldDescriptionFor a Basic Volume, Device Manager selects a parity groupbased on the volume criteria. The selected parity group
changes with changes in criteria. If desired, click Select Parity
Groups to make your selection.
For Dynamic Provisioning volumes, the system selects an HDP
pool based on volume criteria. The selected HDP pool changes
with the changes in criteria. New volumes may be created or
existing volumes may be used. If desired, click Select Pool to
make your pool selection.
Drive type, speed, chip type, RAID level, and parity group or pool can be adjusted as desired, but the primary purpose of
this field relies on the storage system to decide which
resources to use for volume allocation.ManualFor Basic Volume and Dynamic Provisioning volumes, clicking
Manual displays the Selected Volumes dialog box. Click Add
Volumes to select basic volumes or Dynamic Provisioning
volumes.Volume CriteriaDrive TypeIndicates the type of drive (FMD, SSD, SAS, or SATA). The
drive type selection can affect volume performance, and the drive type setting can affect the parity group or HDP pool typechoices.Drive SpeedIndicates the rotational speed (in RPM) of the drive type. This
option is not displayed when an FMD or SSD drive is selected in
Drive Type. The drive speed selection can affect the parity group or HDP pool type choices.Chip TypeIndicates the flash memory chip type of the physical drives. However, this option is only displayed ifVSP G1000, VirtualStorage Platform or HUS VM is the selected storage system and
SSD is the selected drive type. If these two conditions are met,
you can select one of three options: Any, SLC, or MLC.RAID LevelChanging the RAID level can change the parity group or HDP
pool.
The RAID levels and parity group configuration can vary
depending on the selected storage system. For example, RAID6 may be supported on one storage system, but not on another.
In addition, RAID6 is displayed only if RAID6 parity groups
have been configured on the selected storage system.Parity GroupsChanging the volume criteria can change the system selected
parity group. If desired, click Select Parity Groups to make your selection.PoolClick Select Pool to select the HDP pool from which to allocate
volumes. Changing the volume criteria can change the system
selected HDP pool.Creating Volume
SettingsLDEV IDCreating Volume Settings fields are only displayed when
entered volume criteria requires that a new volume be created.
See the previous definition for Volume Capacity field for an
example.
LDEV ID options for volume creation are displayed if VSP
G1000, VSP, or HUS VM are the selected storage system, and
volume criteria are such that new volumes need to be created.204Provisioning storageHitachi Command Suite User Guide 
						

							FieldSubfieldDescriptionSelect auto or manual to locate or identify an Initial LDEV IDfor volume creation.Format TypeThis field displays formatting methods that are available for the
volume to be created, and available for basic volumes on the
specified storage system. For example, you might see options
for setting either a quick or a basic format.
Note that during a quick format, the load might become
concentrated on some components, lowering the I/O
performance of all hosts that are running in the target storage
system.Stripe SizeThis field displays stripe size options for the volume to be
created, as supported by the specified storage system (for
example, 64 KB).Resource Group-This field only displays allocating volumes for created users
(those not associated with built-in accounts), and allows them
to potentially source the volume or volumes from multiple
resource groups to which they have access rights, as configured for their account type.Specify a new
label-Volume labels are searchable, and therefore recommended as a
way to find volumes.
Select the check box to add a LDEV label. If the target volume
is an existing volume with a current label, the new label is
applied to the volume.Initial value-The smallest number of sequential numbers. The Initial value is
not required, but can be useful for differentiation when
allocating multiple volumes. For each volume, the number is in
ascending order of LDEV ID.Reflect these
labels to the
storage system-Reflect these labels to the storage system is checked by default so that naming is consistent between HCS and the storage
system itself. If the selected storage system does not support
label setting, this item is not displayed.CLPR for DP
volume-Select cache logical partition (CLPR) values from the list and
assign this value to DP volumes when two conditions are met:
the target storage system supports CLPR, and DP volumes are
selected.
Select either of the following values: Automatically, which assigns the default value if it is a new volume (if it is an
existing volume, the CLPR is unchanged), or CLPR, which
assigns a CLPR number (0-9...) to the unallocated volume.Command
Device-When allocating a volume intended to be a command device for a pair management server, select the Command Devicecheckbox and select Enabled. You may also enable or disable
the following:
• Command Device Security
• User Authentication
• Device Group DefinitionUse secondary
volume of
global-active
device-When primary and secondary storage systems are not
discovered by a single HCS management server, select this
checkbox to reserve the secondary volume to prevent access
until the global-active device pair can be created using
Replication Manager.Provisioning storage205Hitachi Command Suite User Guide 
						

							FieldSubfieldDescription>> LUN Path
Options(See the
following two
fields for
details)Click LUN Path Options to display the fields and buttons for configuring LUN paths (the storage port to host port mappings
that connect volumes to hosts).No. of LUN
paths per
Volume-Specify the number of LUN paths to allocate per host. Changing
the path count may cause the system to suggest a new path for you automatically.
Click Edit LUN Paths to assign or change LUN paths. LUN paths
can be displayed in either graphical (Topological Graph) or
tabular (Selection Table) formats. In both views, use these
links to display WWN nickname information to confirm the
target host bus adapter (HBA).
• In the graphical view, click on a storage port row to add it to the  LUN Path Editor  panel. Connect the line to the
target HBA. When another line is displayed, you can
connect it to another HBA or discard it with a click.
• In the tablular view, select a storage port, select a host port row, and then click Add to move the mapping to the
Selected host Ports panel.
When editing the LUN path of a global-active device paired
volume, you can specify the settings while referencing the LUN
paths of the other volume.
To delete default or incorrect mappings, click the connector line
in the graphical view, or click Remove in the tabular view.
For Hitachi NAS Platform family, the path redundancy setting isrecommended. By default, the number of LUN paths displayed
is equal to the number of Hitachi NAS Platform ports or storagesystem ports, whichever is lower.LUN Security
Disabled
Storage Ports,
Selected
Storage Ports-These related screens only display under LUN Path Options
when Allocate without LUN security is selected from the host drop-down. For more information, see the previous Hosts field
description.
Unsecured ports are listed in LUN Security Disabled Storage
Ports. Select the ports on which to make the volume available,
and click Add to move the ports to Selected Storage Ports. You
can review your plan and click Submit for this allocation task.
All hosts that can access the ports on which the volume is on
can access the volume.>> Host Group
and LUN
Settings(See the
following two
fields for
details)Volume allocations using Fibre Channel or FCoE prompt for
such items as host group name, host mode, host mode options, and LUN number.
To display or hide the following fields, click Host Group and LUN Settings.Host GroupsShared by All
HostsThis option specifies the configuring of all hosts in a single host
group when volumes are allocated to multiple hosts
simultaneously.Separate for
Each HostThis option specifies the configuring of a separate host group for each host when volumes are allocated to multiple hosts
simultaneously.206Provisioning storageHitachi Command Suite User Guide 
						

							FieldSubfieldDescriptionNameDisplays host group information for hosts that are in a host
group. For hosts that are not in a host group, a host group can be created by entering a name for a host group as needed.Host Group
Settings in
DetailThis button displays a list of host groups than can be used
during volume allocation, or which were previously created for
prior volume allocations.Host modeSelect the host mode that supports the host type for which you
are allocating volumes.Host mode
optionsSelect one or more host mode options for supporting special
requirements for specific applications.LU Numberauto or manual
selection
buttonsLogical unit (LU) numbers can be assigned automatically or
manually for the volumes being allocated.
To automatically assign LU numbers to the allocated volumes,
select auto and enter a start from number (or use the default).
LU numbers are set in ascending order while avoiding existing
numbers.
To manually assign LU numbers to the allocated volumes,
select manual and click Select LU Number to choose a starting
LU number.>> Virtual ID
Settings(See the next
field for details)Virtual ID Settings for global-active device are displayed only when options other than the default virtual storage machine
are used on the primary storage.
An option for manually specifying the starting virtual LDEV ID
to use for allocated volumes. Volumes for which virtual IDs have not been specified are assigned a new virtual LDEV ID
when they are allocated to a host that belongs to resource
groups used in data migrations that use virtual IDs.
Virtual LDEV IDs are assigned automatically by default, with unused IDs assigned to volumes in ascending order. If a user
manually specifies an ID, volumes receive the lowest available ID that is equal to or greater than the specified value.
For global-active device, accept the default starting virtual LDEV ID for global-active device paired volumes being
allocated, or manually select a starting virtual LDEV ID. The displayed value is the minimum value that can be specified asan LDEV ID. The virtual LDEV IDs will provide a single ID forthe global-active device paired volumes being accessed by
hosts.Starting virtual
LDEV ID TargetsLDKCLogical disk controller (LDKC) number that forms part of the
starting virtual LDEV ID.CUControl unit (CU) number that forms part of the starting virtual
LDEV ID.DEVDevice (DEV) number that forms part of the starting virtual
LDEV ID.>> Pair
management
Server Settings(See the
following two
fields for
details)These selections are made on the Primary and Secondary tabs.Provisioning storage207Hitachi Command Suite User Guide 
						

							FieldSubfieldDescriptionPair
management
server-Displayed hosts will be pair management servers configured
during global-active device setup.Instance IDNewCreate a new configuration definition file (with a new instance
ID). The entered instance ID is validated to prevent duplicates.
You can also specify a specific UDP port number for communications. Available UDP port numbers are:
• 0 - 899
• 999 - 4093ExistingUse an existing configuration definition file. The existing
instance IDs are listed.>> Pair Settings(See the
following 3
fields for
details)For global-active device, pair settings fields are used to finalize
pair information.Quorum Disk-The quorum disk number is configured for the primary and
secondary storage systems during the initial global-active device setup. You can accept the default value or select a
value.Copy GroupNewUsed to create a new copy group by name, for the global-active
device pairs being allocated. Valid copy group names must be unique in a configuration definition file (horcmN.conf) andfollow these rules:
• 1 - 31 characters
• A - Z, a - z, 0 - 9, (dash -), (underscore _ ), (period .), @
• '-' is not permitted as the first characterExistingPlaces global-active device pairs into an existing copy group. Existing is disabled if no copy group exists. from the initial
global-active device setup, or on the pair management server.Pair nameAutomaticA pair name consisting of a prefix and start sequence no. is
created automatically by the system.ManualA pair name consisting of prefix and start sequence no. is
created manually by the user. Valid pair names must be unique in a copy group, and follow these rules:
• 1 - 26 characters
• A - Z, a - z, 0 - 9, (dash -), (underscore _ ), (period .), @ • '-' is not permitted as the first character• Start sequence no should be 0 - 99999
• The prefix and start sequence no. should not be blank>> iSCSI Target
and LUN
Settings(See the
following two
fields for
details)Volume allocations using iSCSI will prompt for items such as
host mode, host mode options, nickname of the iSCSI target,
and LU number.
To display or hide the following fields, click iSCSI Target and
LUN Settings.iSCSI TargetsShared by All
HostsSelect this option to indicate that all hosts in the volume
allocation reference the same iSCSI targets.Separate for
each HostSelect this option to indicate that each host in the volume
allocation references different iSCSI targets.208Provisioning storageHitachi Command Suite User Guide 
						

							FieldSubfieldDescriptionSelecting
MethodSelect Use an existing iSCSI Target to indicate that you want to use existing iSCSI targets. Select Create an iSCSI Target to
indicate that you want to create new iSCSI targets.NamePrompts you to create a new iSCSI target, or displays the
existing iSCSI target name.iSCSI Target
Settings in
DetailDisplays a list of iSCSI targets that can be used during
allocation. This also displays iSCSI targets that were set after
the task for allocating volumes was executed.Host modeSelect the host mode that supports the host type for which you
are allocating volumes.
Note:  When volumes are allocated to multiple hosts whose
host modes differ, Mixed is displayed and indicates an error.Host mode
optionsSelect one or more host mode options to support special
requirements for specific applications.LU Number-This is the same as described in Host Groups.>> Host Group
and LUN
Settings for Mid-
range Storage(See the
following field
for details)For mid-range storage systems, the Host Group and iSCSI
target dialog boxes can include additional fields for enhancing
the management of mid-range storage systems.
The following fields are specific to mid-range storage systems
only. The Host Mode and LU Number fields remain part of the
mid-range storage dialog box and are documented in the
previous descriptions.OptionsPlatformSelects the host platform type (for example, Windows) to assist
in setting host mode.MiddlewareSelects the installed software on the platform to assist in
setting host mode.Alternate PathIndicates the multipath management software used by the host
to assist in setting host mode.FailoverIndicates the cluster software used by the host to assist in
setting host mode.Additional
ParametersClick Select to display additional specific usage options to assist in setting host mode.
Related concepts
•
About allocating volumes  on page 188
Related tasks
•
Allocating volumes from general tasks  on page 192
•
Allocating volumes to selected hosts  on page 193
•
Allocating volumes to selected file servers  on page 194
•
Allocating selected volumes to hosts  on page 195
•
Allocating volumes to clustered hosts  on page 196
•
Allocating volumes by using a keyword search  on page 198
•
Allocating volumes by using a criteria search  on page 199
•
Allocating volumes by using existing volume settings  on page 199
•
Allocating global-active device pairs  on page 291
Provisioning storage209Hitachi Command Suite User Guide 
						

							•Allocating global-active device pairs using existing volumes on page 293
•
Adding redundancy to open-allocated volumes  on page 295
•
Configuring pair management servers  on page 289
Related references
•
Volume allocation methods  on page 190
•
Notes on performing quick formats  on page 140
About clustered-host storage Clustered-host storage is a storage configuration that is created when
volumes are allocated to a new host (or file server) that is added to a host group (also known as a host cluster).
When creating clustered-host storage, you add the WWN of the newly added
host to the host group to which the WWN of an existing host belongs, and you set LUN paths from the newly added host to the same volumes as those
for an existing host.
For example, to better manage and distribute the load on your applications
and resources, update the existing host group by creating clustered-host
storage using existing volumes by allocating them to a new host in the host
group.
Newly allocated volumes represent additional storage resources for a new host. Clustered-host storage supports the reallocation of existing volumeswithin the host group to meet specific needs.
The following figure illustrates the process of adding a host to create
clustered-host storage in a system.
210Provisioning storageHitachi Command Suite User Guide