RadiSys ATCA-5400 RTM, Справочник

Страница: 25 / 38

25
5 COMPONENTS AND SUBSYSTEMS
SAS/SATA controller
The RTM includes an LSI Logic LSISAS1064E, which is a Serial Attached SCSI/Serial Advanced
Technology Attachment (SAS/SATA) controller. The controller has four SAS/SATA ports that
operate at 3 Gbps and connect to the RTM’s optional hard disk drive, to the two rear SAS ports,
and to an AMC on the CPM (if present). The controller also supports a PCI Express interface,
which can be used as a single x1 or x4 lane to connect the RTM to the CPM.
The controller supports an integrated RAID solution, including RAID levels 0 (disk striping) and
1 (mirroring). The controller is compliant with LSI’s Fusion-MPT (message passing technology)
architecture for interface controllers. The architecture takes the burden off the host CPU by
managing the I/O and consolidating interrupts to reduce system bus overhead. The SAS/SATA
controller has integrated transceivers that perform the SerDes conversion necessary for SAS and
SATA transfers.
Each of the eight SAS/SATA PHYs on the controller is capable of 3.0 Gbps and 1.5 Gbps SAS
and SATA link rates. The controller supports SAS versions 1.0 and 1.1, as well as Serial ATA
revision 1.0a.
The controller supports PCI Express receive and transmit data rates of 2.5 Gbps in each
direction, yielding a total bandwidth of 5.0 Gbps for each full-duplex lane. The controller
supports PCI Express revision 1.0a.
The SAS/SATA controller supports a 32-bit external memory bus. Its external memory controller
block provides interfaces to the 2 MB flash ROM and 128 KB NVSRAM that are installed on the
RTM to supply boot and RAID journaling functions.
Hard disk drive
The RTM can support a SAS or SATA hard disk drive, which can be purchased from RadiSys. The
disk must conform to the small form factor (SFF), which is 2.5 inches wide and up to 15 mm in
height.
For information on suitable hard disk drives, see the Promentum Component Compatibility
Report in the AdvancedTCA downloads section of the RadiSys Web site at www.radisys.com/
downloads . For information on installing the hard disk drive, see Installing a hard disk drive on
page 12 .