IBM Redbooks ServeRAID-MR10M, User Manual

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1-6 Overview
Figure 1.1 Example of a SAS Direct-Connect Application
Figure 1.2 shows an example of the ServeRAID-MR10M controller
configured with an LSISASx12 expander that is connected to SAS disks,
SATA II disks, or both.
Figure 1.2 Example of a 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
I
2
C
Interface
NVSRAM
LSISASx12
Flash ROM/
NVSRAM/
SRAM
I
2
C/UART
LSISASx12
SAS/SATA II
Drives
PCI Express Interface
SAS/SATA
Drives
SAS/SATA II
Drives
SAS/SATA II
Drives
SAS/SATA II
Drives
8
SRAM
SRAM SDRAM
Peripheral
Bus
72-bit DDR/DDR2
with ECC
Interface
LSISAS1078
PCI Express to SAS ROC
SAS RAID Controller
Expander
Expander