Complete this task to create extent pools, automatic or custom,
and to specify extent pool parameters.
Each extent pool is either CKD or FB. An extent pool is associated
with either server 0 or server 1. You need a minimum of 2 extent pools, one
for each server, to make full use of the resources. An extent pool is divided
into equal extents of the following size:
- FB - 1GB
- CKD - 1113 cylinders
Your maximum number of extent pools cannot exceed the number of ranks.
It is recommended that you put only ranks with the same capacity and speed
into the same extent pool. RAID types cannot be intermixed in an extent pool.
For performance management, you can create extent pools of a single rank.
Perform
the following steps to create extent pools:
- In the navigation, select . On the Extent pools 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 Extent Pool – Define properties page is displayed.
- Choose either to create your extent pool automatically based on
storage requirements (where the DS Storage Manager automatically
selects your arrays and ranks) or to create a custom extent pool, where you
decide which arrays and ranks are assigned to the extent pools.
- If you chose to create your extent pools automatically, in Create Extent
Pool – Define requirements, provide a nickname for your extent pool, select
the storage type (either FB or CKD) and RAID type, and enter the required
amount of storage. You can optionally select to use any existing unassigned
arrays and ranks if you want the DS Storage Manager to
use arrays and ranks that already exist. Click Next.
The Create Extent Pool – Reserve storage page is displayed.
Note: An extent
pool uses all of the available storage in arrays or ranks that make up the
extent pool, even if you specify a storage amount that is less than the entire
array or rank storage amount. For example, if you have a 385 GB rank and need
100 GB of storage, your extent pool will contain 385 GB of storage. However,
if you have two ranks with 100 GB of storage in each rank and you need 120
GB in your extent pool, your extent pool will contain two ranks with 200 GB
of storage.
- If you chose to create a custom extent pool, perform the following steps:
- In Create Extent Pool – Define properties, provide a nickname for your
extent pool, then select the storage type (either FB or CKD), RAID type, and
server that are assigned to the extent pool. Click Next after
you have made your selections.
- In Create Extent Pool – Select ranks, select the rank that you want to
assign to the extent pool or create a new rank to assign to the extent pool.
Click Next. The Create Extent Pool – Reserve storage
page is displayed.
- In the Create Extent Pool – Reserve storage page, optionally enter
the amount of storage that you want the DS Storage Manager to
reserve for the extent pool. Click Next. The
Create Extent Pool – Verification page is displayed.
- In the Create Extent Pool – Verification page, review the attributes
and values to 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 extent pool creation process.