LSI MegaRAID SCSI 320-2 RAID Controller Series 518 - Manual (Page 58)

5-2 Configuring Physical Drives, Arrays, and Logical Drives
Copyright © 2002 by LSI Logic Corporation. All rights reserved.
5.1.2 Basic Configuration Rules
You should observe the following guidelines when connecting and
configuring SCSI devices in a RAID array:
•
Attach non-disk SCSI devices to a single SCSI channel that does not
have any disk drives.
•
Distribute the SCSI hard disk drives equally among all available SCSI
channels except any SCSI channel that is being reserved for non-
disk drives.
•
You can place up to 30 physical disk drives in a logical array,
depending on the RAID level.
•
An array can contain SCSI devices that reside on an array on any
channel.
•
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.
Note: Be sure to back up your data regularly, even when using
RAID.
5.1.3 Current Physical Device Configuration
Use Table 5.1 to record the current configuration for your physical
devices on SCSI channels 0 and 1.
Table 5.1 Physical Device Configuration
SCSI ID Device Description Termination?
SCSI Channel 0
0
1
2
3