Lenovo ServeRAID M1115 User Manual page 24

Figure 1.1 Example of a SAS Direct-Connect Application
SAS/SATA III Device
SAS/SATA III Device
SAS/SATA III Device
SAS/SATA III Device
The following figure shows an example of a ServeRAID controller
configured with an expander that is connected to SAS disks, SATA III
disks, or both.
Figure 1.2 Example of a ServeRAID Controller Configured with an
Expander
Expander
SAS/SATA III SAS/SATA III
Drives
Configuration Scenarios
SAS
PCI Express
RAID Controller
PCI Express Interface
PCI Express Interface
8
SAS RAID Controller
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 C
Peripheral
Bus
Flash ROM/
NVSRAM/
2
I C/UART
72-bit DDR/DDR2
with ECC
Interface
SRAM
SDRAM SRAM SRAM
Expander
SAS/SATA III
SAS/SATA III
Drives
Drives
1-7