Lenovo ThinkServer RD650 User Manual page 15

12Gb/s MegaRAID SAS Software User Guide
March 2014
These configurations are for both internal connectivity and external connectivity, using SATA II drives, SAS drives,
or both. External enclosure management is supported through in-band, SCSI-enclosed storage. The configuration
must support STP and SMP.
The following figure shows a direct-connect configuration. The Inter-IC (I
The external memory bus provides a 32-bit memory bus, parity checking, and chip select signals for pipelined burst
static random access memory (PBSRAM), nonvolatile static random access memory (NVSRAM), and Flash ROM.
Figure 1 Example of an LSI SAS Direct-Connect Application
The following figure shows an example of a SAS RAID controller configured with an LSISASx12 expander that is
connected to SAS disks, SATA II disks, or both.
NOTE The external memory bus is 32-bit for the SAS 8704ELP and the SAS
8708ELP, and 64-bit for the SAS 8708EM2, the SAS 8880EM2, and the
SAS 8888ELP.
LSI Corporation
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C) interface communicates with peripherals.
Chapter 1: Overview
Configuration Scenarios