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Configuration Scenarios 1-7
Copyright © 2009 by LSI Corporation. All rights reserved.
(PSBRAM), nonvolatile static random access memory (NVSRAM), and
Flash ROM.
Figure 1.1 Example of an LSI SAS Direct-Connect Application
Figure 1.2 shows an example of a SAS RAID controller configured with
an LSISASx12 expander that is connected to SAS drives, SATA II drives,
or both.
Figure 1.2 Example of an LSI SAS RAID Controller Configured
with an LSISASx12 Expander
Flash ROM/
SAS
PCI Express
RAID Controller
SAS/SATA II Device
32-Bit Memory
Address/Data
Bus
PSBRAM/
I
2
C
SAS/SATA II Device
SAS/SATA II Device
SAS/SATA II Device
PCI Express Interface
NVSRAM
I
2
C
Interface
LSISASx12
Flash ROM/
NVSRAM/
SRAM
I
2
C/UART
LSISASx12
PCI Express Interface
8
SRAM
SRAMSDRAM
Peripheral
Bus
72-bit DDR/DDR2
with ECC
Interface
LSISAS2108
PCI Express to SAS ROC
SAS
RAID Controller
Expander
Expander