Abstract: A signal testing implementation provides significant advantages over conventional signal testing techniques. According to an exemplary embodiment, an apparatus for enabling signal testing such as SCSI signal testing in a test configuration includes a portable cable environment having a plurality of cables exhibiting a plurality of lengths and impedances. A user can selectively connect any one of the cables between a host device such as a server and a target device such as a disk subsystem. Signal measurement connectors which are connectable to the portable cable environment may be provided. According to an embodiment, each of the signal measurement connectors includes one or more test measurement points to enable collection of signal testing results.

Abstract: A method and apparatus for generating a CRC/parity error in network environment. A SCSI bus expander such as an Ultra320 bus expander or the like is added between a sending device and a receiving device. The sending device-receiving device pair may execute a training session to determine the skew compensation. During the training session, the SCSI bus expander may figure out timing differences due to skew and adjusts the timing of each data signal to compensate for skew. For each data signal, a compensated time may be obtained. The compensated time may then be modified through a JTAG port of the SCSI bus expander. The compensated times may be adjusted such that a CRC/parity error is generated on every I/O or just some I/Os to the receiving device. By intentionally generating a CRC/parity error, the response of the devices in the SCSI environment to a CRC/parity error may be evaluated during an input/output (I/O) test.

Abstract: A method and system for performing diagnostics and validation operations on a device under test uses near natural language commands. A host machine controls the testing either locally or remotely, such as through the Internet. Various options for running a test or battery of tests on the device under test include entering commands through a prompt line on a graphical user interface, reading commands from a file, or manipulating graphical objects representing components or devices and operations on a graphical user interface. A script may serve as a metric to determine the successfulness of a test or battery of tests of the device under test.

Abstract: A communications layer is provided between a host-based SCSI initiator and a SCSI target device to fully automate the validation process. The communications layer allows the host to direct variation and modification of the target parameters and behavior using vendor unique commands. The behavioral modification aims to establish interoperability by conforming the behavior of the target to the host behavior. The host-based initiator transports a suitable command structure to the target device containing appropriate ones of the vendor unique commands and associated parameter data. The target executes and otherwise processes the command structure to effectuate a reconfiguration according to the specifics of the command code. The command code is sufficient to fully reconfigure the SCSI target. Accordingly, the reconfiguration process is carried out in a fully automated fashion.

Abstract: An improved PCI verification method and apparatus provides iterative testing of all desired conditions or protocol combinations in a PCI system. One or more commands may be tested in combination with one or more functional behavior parameters throughout a desired range of variable parameter values. In one aspect, an apparatus and method for testing a PCI device for compliance under the PCI specification in target operation is provided. In another aspect, an apparatus and method for testing a PCI device for compliance under the PCI specification in master operation is provided.