Installation guide

For a two-node cluster, you may directly aach to a CXx00 storage array with ber cables rather than using a switch. This requires at
least two HBAs and associated cables per server. In addion, PowerPath soware is required for these implementaons.
Dell PowerVault Installaon Steps
A more common opon for Direct Aached Storage on two-node clusters is a Dell PowerVault 22xS SCSI storage array. This provides a
relavely low-cost opon for simple clusters. Seng up PowerVault arrays is much easier than seng up a SAN:
1. Set both EMMs to Cluster Mode on the PowerVault array
2. Restart the rst node
3. Set RAID controller on rst node to SCSI ID 6
4. Use <ctrl> <m> during the RAID controllers boot to start the RAID controller conguraon
5. Set the rst RAID controller to Cluster Mode
6. Create at least three LUNs of 5 GB from the rst node
7. Restart the rst node
8. Restart the second node
9. Use <ctrl> <m> during the RAID controllers boot to start the RAID controller conguraon
10. Set RAID controller on second node to SCSI ID 7
11. Set the second RAID controller to Cluster Mode
12. Verify that the second RAID controller can see the same LUNs
13. Restart the second node
Best Pracces for Storage Conguraon
RAID Conguraon - RAID 1 or RAID 10 is recommended for all database components. The use of RAID 5 in an Oracle environ-
ment is discouraged because of the performance penales incurred by the parity computaon.
Minimal LUNs - The minimal number of LUNs required for a RAC cluster is one redo LUN per node, one LUN for archive log les,
one LUN for data les and one LUN for quorum. LUNs = quorum + (# of nodes) + data + archive
Best Pracce LUNs - The best pracce number of LUNs for a RAC cluster is two LUNs per node for redo, one LUN per node for
archive, one or more LUNs for data les and one LUN for quorum. LUNs = quorum + (2 x # of nodes) + (one ore more data) + (# nodes
for archive)
LUN RAID Groups - For highest performance and determinisc response me assign only one LUN per RAID group.
LUN RAID Groups - For opmal performance, assign 8-10 drives per RAID 10 RAID group and 5 or 9 drives per RAID 5 RAID group.
Minimal Disk Spindles - A minimum of 10 disk drives per node should be used (not including hot spares).
Component Placement - Redo log les, database les and archive log les should be separated into dierent physical disk
groups. In the event of a hardware failure, the system can be fully recovered with any two of these components.