Avago Technologies LSI21040 - Manual (Page 17)

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Benefits of SURElink (Extended Domain Validation) 1-7
TolerANT receiver technology improves data integrity in unreliable
cabling environments where other devices would be subject to data
corruption. TolerANT receivers filter the SCSI bus signals to eliminate
unwanted transitions, without the long signal delay associated with
RC-type input filters. This improved driver and receiver technology helps
eliminate double clocking of data, which is the single biggest reliability
issue with SCSI operations. TolerANT input signal filtering is a built-in
feature of the LSI53C1010 and all LSI Logic Fast SCSI, Ultra SCSI,
Ultra2 SCSI, and Ultra160 SCSI devices.
The benefits of TolerANT technology include increased noise immunity
when the signal transitions to HIGH, better performance due to balanced
duty cycles, and improved fast SCSI transfer rates. In addition, TolerANT
SCSI devices do not cause glitches on the SCSI bus at power-up or
power-down. This technology protects other devices on the bus from data
corruption. When it is used with the LVD Link transceivers, TolerANT
technology provides excellent signal quality and data reliability in real
world cabling environments. TolerANT technology is compatible with both
the Alternative One and Alternative Two termination schemes proposed
by the American National Standards Institute.
1.6 Benefits of SURElink (Extended Domain Validation)
SURElink represents the very latest SCSI interconnect management
solution. It ensures robust and low risk Ultra160 SCSI implementations
by extending the Domain Validation guidelines documented in the ANSI
T10 SPI-3 specifications. Domain Validation verifies that the system is
capable of transferring data at Ultra160 speeds, allowing it to renegotiate
to lower speed and bus width if necessary.
SURElink is the software control for the manageability enhancements in
the LSI53C1010. Fully integrated in the SDMS software solution,
SURElink provides Domain Validation at boot time as well as throughout
system operation. SURElink extends to the Distributed Management
Interface (DMI) based System Management components of SDMS,
providing the network administrator remote management capability.
SURElink Domain Validation provides three levels of integrity checking:
Basic (level 1), Enhanced (level 2), and Margined (level 3). The basic
check consists of an inquiry command to detect gross problems. The