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1-6 Overview
Copyright © 2006-2007 by LSI Corporation. All rights reserved.
Figure 1.2 shows an example of a RAID controller configured with an
LSISASx12 expander that is connected to SAS devices.
Figure 1.2 Example of RAID Controller Configured with
LSISASx12 Expander
1.4.1 Number of Physical Disks Supported
Your configuration planning for the 8480 RAID controller depends in part
on the number of physical disks that you want to use in a RAID array.
The number of drives in an array determines the RAID levels that can be
supported. Only one RAID level can be assigned to each virtual disk.
Tabl e 1.1 shows the minimum and maximum number of drives required
for each RAID level.
SAS RAID Controller
LSISASx12
Flash ROM/
32-bit Memory
Address/Data
Bus
PSBRAM/
NVSRAM
LSISASx12
SAS
Drives
PCI Express Interface
SAS
Drives
SAS
Drives
SAS
Drives
I
2
C
Interface
I
2
C
Table 1.1 Physical Drives Required for Each RAID Level
RAID
Level
Minimum # of
Physical Drives
Maximum # of
Physical Drives
01 32