Example Of An Lsi Sas Direct-Connect Application; Example Of An Lsi Sas Raid Controller Configured With An Lsisasx12 Expander - LSI MegaRAID SAS 9240-4i User Manual

(PSBRAM), nonvolatile static random access memory (NVSRAM), and
Flash ROM.
Figure 1.1

Example of an LSI SAS Direct-Connect Application

SAS/SATA II Device
SAS/SATA II Device
SAS/SATA II Device
SAS/SATA II Device
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
LSISASx12
Expander
Configuration Scenarios
Copyright © 2009 by LSI Corporation. All rights reserved.
SAS
PCI Express
RAID Controller
PCI Express Interface
PCI Express Interface
8
SAS RAID Controller
LSISAS2108
PCI Express to SAS ROC
32-Bit Memory
Address/Data
Flash ROM/
Bus
PSBRAM/
NVSRAM
2
I C
Interface
2
I C
Peripheral
Bus
Flash ROM/
NVSRAM/
2
I
72-bit DDR/DDR2
with ECC
Interface
SDRAM
LSISASx12
Expander
C/UART
SRAM
SRAM SRAM
1-7