Seagate Medalist Pro 2160N Manuel d'utilisateur télécharger pdf (Page 35)

Storage Devices Training Module 35

STORAGE DEVICES

tional data security above Level 0, but requires additional hardware to

operate.

Level 4. This level stripes data across several drives at a block level,

with parity stored on one drive. This level also offers some additional

data security above Level 0, as data can be recovered as long as the par-

ity information can be accessed. Level 4 is commonly used on large Þle

servers.

Level 5. This level is similar to Level 4, but parity information is distrib-

uted among all drives. This level is often used in database servers.

Power Computing RAID systems

Power Computing sells preconÞgured RAID systems as an option for

the PowerTower Pro. The system consists of two hard drives, an

Adaptec 2940 PCI card, special high-grade SCSI cable, and Conley¨

SoftRAIDª software. The drives are set up by Power Computing in

either a striped or mirrored conÞguration. A RAID system is normally

sold in addition to, not in place of, the normal hard drive.

The locations of the components are designed to keep the cabling as

short as possible to further improve the speed and reliability of the sys-

tem. The Adaptec 2940 card is installed in the top PCI slot. The two

hard drives are installed in a special cage, known as the RAID rack,

located on the crossbar on the middle of the chassis. A three-head

SCSI cable approximately one foot long connect the devices. The drive

connected to the middle position of the SCSI cable is set to ID 1 and is

unterminated. The drive connected to the end of the SCSI cable is set

to ID 0 and is terminated.

Conley SoftRAID

SoftRAIDis the software application that conÞgures and controls RAID

systems sold by Power Computing. Use SoftRAID to:

¥ Format hard drives

¥ Create striped volumes

¥ Create mirrored volumes

¥ Update disk drivers

SoftRAID is composed of two components: the SoftRAID application,

and a system extension called SoftRAID Monitor. The application is

used for the conÞguration of the RAID system, and does not need to be

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Seagate Medalist Pro 2160N Manuel d'utilisateur Page 35