A customer buys two PS Series arrays to store data for the database servers. One array has 15K RPM disks configured as RAID 10, and the other array has 10K RPM disks configured as RAID 6. This system was chosen to meet the need to data capacity and a very high anticipated level of IOPs.
The customer reports that database servers run business critical applications. Performance is a priority for these databases. A large data warehouse holds historical data from the business used to mine data.
Which two configurations provide the fastest performance to meet the customer requirements? (Choose two.)
Correct Answer: A,E
Explanation/Reference:
Explanation:
Enabling and Disabling a Volume RAID Preference
A PS Series group uses automatic performance load balancing (enabled by default) to identify the RAID level that provides the best performance for a volume and store volume data on pool members with that RAID level, if such members are available.
You can override automatic performance load balancing by enabling a RAID level preference on a volume.
References: http://psonlinehelp.equallogic.com/en/V6.0/groupmanager.htm (Enabling and Disabling a Volume RAID Preference)