LSI MegaRAID SCSI 320-2 RAID Controller Series 518 - Manual (Page 57)

MegaRAID SCSI 320-2 Hardware Guide 5-1
Copyright © 2002 by LSI Logic Corporation. All rights reserved.
Chapter 5
Configuring Physical Drives,
Arrays, and Logical Drives
This chapter explains how to configure SCSI physical drives, arrays, and
logical drives connected to the MegaRAID SCSI 320-2 controller. It
contains the following sections:
•
Section 5.1, “Configuring SCSI Physical Drives”
•
Section 5.2, “Configuring Arrays”
•
Section 5.3, “Creating Logical Drives”
•
Section 5.4, “Configuring Logical Drives”
•
Section 5.5, “Planning the Array Configuration”
5.1 Configuring SCSI Physical Drives
SCSI physical drives must be organized into logical drives. The arrays
and logical drives that you construct must be able to support the RAID
level that you select. The MegaRAID SCSI 320-2 controller has two SCSI
channels.
5.1.1 Distributing Drives
Distribute the disk drives across all channels for optimal performance. It
is best to stripe across channels instead of down channels. Performance
is most affected for sequential reads and writes. The MegaRAID SCSI
320-2 controller supports SCSI CD-ROM drives, SCSI tape drives, and
other SCSI devices as well as SCSI hard disk drives. For optimal
performance, all non-disk SCSI devices should be attached to one SCSI
channel.