User Guide

53987 Rev. 3.01 June 2016
AMD-RAIDXpert2 User Guide
Chapter 3
Arrays, Disks and RAID Levels
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3.13.3 Application Workload
When configuring an array, workload is probably the most important performance variable. Most
applications do many more reads than writes. The best performance is obtained with array types
like RAID0, RAID5, or RAID10.
3.14 RAID Reliability Considerations
RAID reliability is enhanced through data redundancy and backup.
3.14.1 Data Redundancy
RAID1, RAID5, or RAID10 are necessary for redundancy. With redundancy, both capacity and
performance are sacrificed for reliability. With RAIDXpert2, extremely high performance is
obtained even with redundant-type arrays.
3.14.2 Backup
It is good practice to back up your data periodically in case of a catastrophic failure. Tape backup
or other media can be used to secure your data.
3.15 Flexibility and Expansion Considerations
Before configuring an array, consider the following points to enhance the flexibility of the RAID
system.
3.16 Multiple RAID Levels
With RAIDXpert2, different RAID levels can be created on the same disk, to adapt each array to
the I/O that it processes. Also, more than one array can be created per disk.
Depending on the array capacity and redundancy level, an existing array can be transformed to
another RAID level, if the level of the array being used is not the optimal RAID level for the
application. Also, different arrays with different characteristics can be built for different
applications.
3.17 RAIDABLE Arrays
RAIDABLE arrays (also known as RAID Ready) are a special type of Volume (JBOD) that allow
the user to add more storage space or create a redundant array after a system is installed.
RAIDABLE arrays are created using Option ROM, UEFI, or rcadm.
Note: The ability to create RAIDABLE arrays may not be available on your system.