Intel SASMF8I User Manual download pdf (Page 12)

2 Intel® RAID Controller SASMF8I Hardware User’s Guide

The SAS controller supports the ANSI Serial-attached SCSI (SAS) Standard, Version 1.0.

In addition, the controller supports the Serial ATA (SATA) protocol defined by the Serial

ATA Specification, Version 1.0a. The SAS controller is a versatile controller that supports

both the SAS and SATA interfaces and provides the backbone of both server and high-end

workstation environments.

Protocols supported include:

• Serial SCSI Protocol (SSP): Communication with other SAS devices.

• SATA II Protocol: Communication with other SATA II devices.

• Serial Management Protocol (SMP): Topology management information sharing

with expanders.

• Serial Tunneling Protocol (STP) support for SATA II through expander interfaces.

Usability

• Smaller, thinner cabling with serial point-to-point 3.0 Gbps data transfer rates.

• Allows mixed connections to SAS or SATA II targets.

• Support for non-disk devices and mixed capacity drives.

• Support for software RAID levels 0, 1, 5, and 10.

• Global hot spare with auto rebuild if an array drive fails.

• Fixed RAID stripe size of 64 KB.

• Advanced array configuration and management utilities that provide:

— Drive migration.

— Drive roaming.

• An upgradeable Flash ROM interface.

• Allows for staggered spin-up, hot plug, and lower power consumption.

• User specified rebuild rate (% of system resources to use from 0-100%).

Warning: Exceeding 50% rate may cause operating system errors caused by waiting

for controller access.

• Background operating mode can be set for rebuilds, consistency checks,and

initialization (auto restarting consistency check on redundant volumes).

Redundancy and Error Handling

• Enclosure management support, including LEDs.

• Activity and fault indicators per drive, port selector (dual-port drives).

• Drive coercion (auto resizing to match existing disks).

• Auto-detection of failed drives with transparent rebuild. Disk activity (I/O to the

drive) must be present for a missing drive to be marked as failed.

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Intel SASMF8I User Manual Page 12