Table of Contents
Advertisement
HBA Features
is capable of 1.5 Gb, 3 Gb, or 6 Gb SAS and SATA link rates. The PCI-Express interface is
capable of 5 GT/s per lane in each direction. With eight fully duplexed links, the total becomes
80 GT/s. Note that actual transfer rates are a function of the host system environment. The
card is packaged in a single-wide PCIe Module that conforms to the PCIe ExpressModule
Electromechanical Specification, Rev. 1.0.
The HBA contains on-board Flash ROM for storing the firmware. The board also includes
Hot Plug architecture which allows insertion and removal of the module when the system has
been alerted via the Attention Switch. The light-emitting diodes (LEDs) on the HBA report a
heartbeat, activity, and fault conditions when detected by the firmware. Fusion-MPT firmware
operates the HBA.
The functionality of the HBA comes from the LSISAS2008 controller ASIC. The HBA
connects up to eight direct connected SAS/SATA devices to a computer system through the
PCIe ExpressModule interface. The HBA controller uses eight PCIe Phys.
The HBA supports the following features:
Serial SCSI protocol (SSP), serial ATA tunneling protocol (STP), and serial management
■
protocol (SMP), as defined in the Serial Attached SCSI (SAS) Specification, version 2.0
Simplified cabling with a point-to-point, serial architecture
■
Smaller and thinner cables that promote unrestricted airflow
■
A serial, point-to-point, enterprise-level storage interface
■
Data transfers using SCSI information units
■
Compatibility with SATA target devices
■
Narrow and wide ports (See
■
TABLE 1-1
Half Duplex
Narrow Port (1 Lane), 600 MB/s
Wide Port (2 Lanes), 1200 MB/s
Wide Port (4 Lanes), 2400 MB/s
Hot-plug insertion in ExpressModule enclosures, as defined in the PCIe ExpressModule
■
Electromechanical Specification, version 1.0
Several LEDs routed through the front of the enclosure: an Activity LED and Fault LED
■
for each mini-SAS connector, and a Power LED and Attention LED for the HBA
Figure 1-1
10
Sun Storage 6 Gb SAS ExpressModule HBA • December 2014
Table
6 Gb SAS Bandwidths
depicts the physical features of the HBA.
1-1)
Full Duplex
Narrow Port (1 Lane), 1200 MB/s
Wide Port (2 Lanes), 2400 MB/s
Wide Port (4 Lanes), 4800 MB/s
Advertisement
Table of Contents
