HP XP Racks - Manual (Page 61)

Definition Subfield Field
Note that when you set the volume type to Basic or Thin Provisioning you
will see Tier, Automatic and Manual options as explained below. When
the volume type is Smart Pool , the fields will be displayed as noted above
in Volume Type.
The fields below can be displayed or hidden by clicking Advanced Options.
These fields support explicit volume allocation (Tier, Manual) or volume
allocation based on criteria such as drive type or RAID level.
>> Advanced
Options
This field displays only if Smart Pool is selected as the volume type, and
aSmart pool has been selected with Select Pool (see Volume Selection
above). You can select a specific tier policy for the volume to be allocated,
or select All.
Tiering Policy
Setting
Note: This field is not the same field as the Volume Selection field above
when Volume Type is set to Smart Pool .
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 with Select
a Tier and make a selection.
Tier
Volume Selec-
tion
Device Manager automatically selects volumes based on the specified
volume criteria.
For Basic volumes, Device Manager will select a parity group based on
volume criteria. The selected parity group changes with changes in criteria.
If desired, you can click Select Parity Groups to make a selection.
For Thin Provisioning volumes the system will select a THP pool based on
volume criteria. The selected THP pool changes with changes in criteria.
New volumes might be created or existing volumes used. If desired, you
can click Select Pool to make a selection.
Drive type, speed, RAID level and parity group or pool can be adjusted
if desired, but the primary purpose of this field is to rely on the storage
system to decide the resources used for volume allocation.
Automatic
For Basic and Thin Provisioning volumes, clicking Manual will bring up
the Selected Volumes screen. Click Add Volumes to select basic volumes
or Thin Provisioning volumes.
Manual
Keep in mind that volume criteria may have some impact on volume per-
formance. Changing the drive type can change the parity group or THP
pool.
Drive Type
Volume Criter-
ia
Changing the drive speed (rotational RPM) can change the parity group
or THP pool.
Drive Speed
Changing the RAID level can change the parity group or THP pool.
Note that 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. Additionally, RAID6 is displayed
only if RAID6 parity groups have been configured on the selected storage
system.
RAID Level
As noted above, changing volume criteria can change the system selected
parity group. If desired, you can click Select Parity Groups to make a se-
lection.
Parity Groups
User Guide 61