Accusys ACS-76130 User Manual
Page 11
Chapter 2 – Before you begin
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This chapter contains includes all the information you need to
decide which RAID level to use and to prepare for installation.
You will find:
A full introduction to and comparison of RAID levels 0 and 5
Important notices on the safe operation and installation of
ACS-76130
Pre-installation planning
Introduction to RAID levels
The ACS-76130 can support the following RAID levels: 0 and 5. Which is the right level for
you? The answer depends on the application it is used for.
RAID Level 0 offers high transfer rates, and is ideal for large blocks of data where speed is of
importance. Computer Aided Design, Graphics, Scientific Computing, Image and Multimedia
applications are all good examples. If one drive in a RAID 0 array fails however, the data on
the whole array is lost.
RAID Level 5 arrays offer high I/O transaction rates, and are the ideal choice when used with
on-line transaction processing applications, such as those used in banks, insurance
companies, hospitals, and all manner of office environments. These applications typically
perform large numbers of concurrent requests, each of which makes a small number of disk
accesses. If one drive in a RAID 5 array fails, the lost data can be rebuilt from data on the
functioning disks.
Further information on RAID concepts can be found in Appendix B, Glossary.