Users Guide

38 Configuring Network and Storage for Oracle RAC Database
Configuring Your EqualLogic iSCSI Storage
Creating Volumes
Before data can be stored, the PS5000XV physical disks must be configured
into usable components, known as volumes. A volume represents a portion of
the storage pool, with a specific size, access controls, and other attributes.
A volume can be spread across multiple disks and group members and is seen
on the network as an iSCSI target. Volumes are assigned to a pool and can be
easily moved between pools, with no impact on data availability. In addition,
automatic data placement and automatic load balancing occurs within a pool,
based on the overall workload of the storage hardware resources within
the pool.
NOTE: It is recommended that you keep the OCR mirror and the voting disk mirrors
on a different volume to avoid warning messages during OCR and voting disk
configuration.
Table 6-4. Volumes for Oracle RAC Configuration
Volume Minimum Size RAID Number of
Partitions
Used For Operating System
Mapping
First Area
Volume
3 GB 10 One extended
partition with
five logical
drives - 3 x
250
MB for
Voting Disk
and 2 x
300
MB for
OCR
Voting disk
and Oracle
Cluster
Registry
(OCR)
One extended
partition with five
logical drives:
3 x Voting Disk,
2 x OCR
Second Area
Volume(s)
Larger than
the size of
your database
10 One Data ASM disk group
DATABASEDG
Third Area
Volume(s)
Minimum
twice the size
of your
second area
volume(s)
5 One Flash
Recovery
Area
ASM disk group
FLASHBACKDG