K E Y A P P L I C AT I O N S
Intersystem connections - server
and workstation to RAID and
network management
Upgrading existing Fast or
Ultra SCSI systems
Adding Ultra2 SCSI hard drives
to servers, workstations and
RAID storage subsystems
LSI8951U
SCSI Host Adapter
The LSI8951U PCI-to-Ultra2
SCSI host adapter combines
Ultra SCSI data transfer rates
with reliable data integrity.
O V E R V I E W
At up to 80 MBps, the LSI8951U host adapter combines the highest
Ultra2 SCSI data transfer rates with the high performance PCI system bus.
Based on an industry first, the LSI53C895 Ultra2 SCSI I/O processor, the
LSI8951U provides Universal Low Voltage Differential (LVD) signaling for
SCSI. LVDlink
technology, the implementation of LVD transceivers, eliminates
the distance and device constraints that exist in today
’
s Ultra SCSI single-
ended designs while offering higher data transfer rates.
Installing and configuring the LSI8951U host adapter couldn
’
t be easier.
With built-in SCAM (SCSI Configured AutoMatically) and SCSI bus configuration
utilities, setting up the SCSI bus is a snap. The powerful SCSI Device
Management System (SDMS) software, and on-board BIOS and configuration
utility make installation of the SCSI I/O subsystem easy and virtually automatic.
And with no jumpers, switches, IRQs, system DMA or addresses to budget,
installing the LSI8951U to connect up to 15 Ultra2 devices becomes a matter
of plugging in the host adapter and loading the drivers.
Whether you are migrating from Ultra SCSI or Fast SCSI, Ultra2 SCSI
provides a high performance I/O migration path while preserving your existing
PCI-SCSI software investment. As compared to Ultra SCSI designs, the
LSI8951U provides twice the performance and allows four times the cable
length and number of connected devices. The high SCSI bus bandwidth of
Ultra2 SCSI, along with improvements in distance, connectivity, and reliability
make the LSI8951U an ideal host connection to a RAID controller. It is also
suitable for other demanding I/O applications in the high performance work-
station and server markets.
The LSI8951U LVDlink transceivers provide the data reliability of differential
signaling without the cost of high-voltage differential transceivers. For critical
data handling applications, LSI Logic offers data and product reliability, software
and hardware compatibility, with easy installability. Extensive host adapter
and software testing ensures OEM compatibility with all major operating systems
and a wide variety of SCSI-1, Fast SCSI-2, Ultra SCSI and Ultra2 SCSI devices.
Bus Interface:
3/5V PCI
PCI Mode:
Bus Master
Plug-and-Play:
Yes
SCSI Rate:
40 MBps synchronous (SE)
80 Mbps synchronous (LVD)
14 MBps asynchronous
SCSI Bus:
16-bit SE and LVD
Bootable:
Yes
No. of SCSI Devices:
15
SCSI Connectors:
Internal: 68-pin HD
External: 68-pin VHDCI