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MegaRAID SCSI 320-0 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. 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
Physical SCSI 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 320-0 controller does not
have a SCSI channel; the number of SCSI channels depends on the
SCSI controller on the motherboard.
5.1.1 Basic Configuration Rules
You should observe the following guidelines when connecting and
configuring SCSI devices in a RAID array:
· You can place up to 15 physical drives in an array, depending on the
RAID level.
· Include all drives that have the same capacity in the same array.
· Make sure any hot spare has a capacity that is at least as large as
the largest drive that may be replaced by the hot spare.
· When replacing a failed drive, make sure that the replacement drive
has a capacity that is at least as large as the drive being replaced.