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1-6
Figure 1.1
Example of a 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 the ServeRAID M5025 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
LSISASx12
Expander
SAS/SATA II
SAS/SATA II
Drives
Overview
SAS
PCI Express
RAID Controller
PCI Express Interface
PCI Express Interface
8
SAS RAID Controller
LSISAS2108
PCI Express to SAS ROC
SAS/SATA
Drives
Drives
32-Bit Memory
Address/Data
Flash ROM/
Bus
PSBRAM/
NVSRAM
2
I
C
Interface
2
I
Peripheral
Bus
Flash ROM/
NVSRAM/
2
I
C/UART
72-bit DDR/DDR2
with ECC
Interface
SDRAM
SRAM
SRAM
LSISASx12
Expander
SAS/SATA II
SAS/SATA II
Drives
Drives
C
SRAM
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