IBM MegaRAID 8480 manual Configuration Scenario

The RAID controller supports the SAS protocol as described in the Serial Attached SCSI Standard, version 1.1. The controller also supports the Serial ATA II (SATA II) protocol defined by the Serial ATA specification, version 1.0a. SATA II is an extension to SATA 1.0a. In addition, the RAID controller supports the following SATA II features:

•3 Gbit/s SATA II

•Staggered spin-up

•Hot Plug

•Activity and fault indicators for each PHY

•Port Selector (for dual-port drives)

Each port on the RAID controller supports SAS or SATA II devices using the SSP, SMP, STP, and SATA II. The SSP enables communication with other SAS devices. SATA II enables the RAID controller to communicate with SATA II devices.

1.4Configuration Scenario

The following is the main scenario in which you can use the MegaRAID

8480 RAID Controller:

•High-end external SAS or SATA II configurations: Disks can be either SATA II or SAS. External enclosure management through in-band, SCSI-enclosed storage. STP and SMP need to be supported.

Figure 1.1 shows a direct-connect configuration. The Inter-IC (I2C) interface communicates with peripherals. The external memory bus provides a 32-bit memory bus, parity checking, and chip select signals for pipelined synchronous burst static random access memory (PSBRAM), nonvolatile static random access memory (NVSRAM), and Flash ROM.

1-4Overview

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