SE7210TP1-E Datasheet, PDF (41/145 Pages) Intel Corporation – Intel® Server Board Technical Product Specification

Intel® Server Board SE7210TP1-E TPS
Functional Architecture
Migration to new Ultra320 SCSI technology is easy with the Adaptec 7901. It is backward
compatible with Ultra320, Ultra160, Ultra2, and earlier SCSI generations. The chip is available
in a 356-pin Thermally Enhanced Ball Grid Array (TEBGA) package, which is signal compatible
with the Ultra160 SCSI Adaptec 7892 for a smooth upgrade to Ultra320 SCSI.
Now offered with the Adaptec 7901 is HostRAID*, an advanced RAID solution that includes
hardware mirroring on the Adaptec 7901. HostRAID offers bootable RAID levels 0 and 1 with
other advanced RAID features such as dedicated hot spares with automatic recovery, on-line
capacity expansion, event scheduling, SAF-TE support, SNMP, DMI, and on-line RAID level
migration.
The Adaptec 7901 uses Ultra320 technology to double Ultra160 data transfer rates up to 320
MBytes/sec. In addition, Adaptec Seamless Streaming* technology allows the Adaptec 7901 to
take full advantage of the SCSI packet protocol enhancements (transfers multiple commands,
data contexts and statuses in single connection) that replaces the legacy SCSI protocol
(transfers single commands, data contexts or statuses per connection).
The Adaptec 7901 also supports Quick Arbitration and Selection (QAS) and SCSI arbitration
fairness. QAS reduces the overhead of control release on the SCSI bus from one device to
another. This improvement reduces command overhead and maximizes bus utilization. SCSI
arbitration fairness prevents a device from dominating the bus by guaranteeing that all devices
have an opportunity to arbitrate.
The Adaptec 7901 fully supports CRC for 16-bit SCSI synchronous data transfers. CRC detects
data integrity errors that would not be detected by simple parity checking used by previous SCSI
generations. The higher data rates achieved on existing Low Voltage Differential (LVD) cable
configurations mandated this improved data integrity feature.
The Adaptec 7901 fully supports Domain Validation, which provides two levels (Basic and
Enhanced) of SCSI bus configuration testing to help ensure Ultra320 and Ultra160 SCSI
topologies operate at optimum speed.
Using Low Voltage Differential (LVD), each Adaptec 7901 channel supports a maximum of 15
devices on a 12-meter cable. In a point-to-point arrangement, cabling can extend to 25 meters.
The Adaptec 7901 incorporates an advanced multi-mode SCSI I/O cell that supports Ultra2,
Ultra160, and Ultra320 SCSI LVD devices, as well as single-ended devices. With only Ultra2,
Ultra160, and Ultra320 devices attached, the SCSI bus performs at full speed and full LVD
cable lengths. When SE devices are attached, the bus defaults to SE speed and cable length.
Revision 2.0
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