Table of Contents
Advertisement
Bag of 16 hard drive mounting screws
Warranty card
CD-ROM containing AcutaView GUI program , user's manual and ACUTA Subsystem
User's Manual (this manual)
What else you need
In order to setup a working system, the following user-supplied items are required:
Host computer system with IEEE 1394 or USB interface (IEEE 1394 and USB host
interface version)
Host computer system with Serial ATA interface (Serial ATA host interface version)
Four disk drives
Pre-installation planning
Introduction to RAID levels
The ACUTA can support the following RAID levels: 0, 0+1 and 5 with the additional option of
RAID 5 + hot spare. 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 0+1 combines mirroring and striping functions on a minimum of four hard disks.
Mirroring provides full redundancy and protects data in case of multiple drive failure (providing
that data on one of each mirrored pair of drives is intact).
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. The ACUTA allows users to set one disk as a hot spare that will be
activated automatically to replace a failed disk.
16
For non-proprietary accessories, such as cables, etc., ask your vendor to
recommend compatible and reliable brands.
The hard drives in a RAID should match in size and speed. All drives in any
array should be identical models with the same firmware versions. RAIDs can
use any size drive, however the smallest drive will determine the size of the
array.
Accusys Acuta User's Manual
Advertisement
Table of Contents
