User's Manual

omdiag: Using the Diagnostic Service 31
The Intel Online Diagnostics tests and the Intel Offline Diagnostics tests are only available on systems
running a supported Red Hat Enterprise Linux operating system.
– Intel Online Diagnostics Tests — Performs a limited set of tests without interrupting normal
NIC operation during the tests.
– Intel Offline Diagnostics Tests — Performs a full set of tests. This test might disrupt the normal
operation of the NIC.
omdiag chassis parallelport
Use the omdiag chassis parallelport command to test the parallel port, which is a high-speed
communications port for attaching certain devices to your system.
The parallel port test writes a series of characters to the port and then reads it back again. If this test
detects differences between the written and read character series, it logs an error message and the test
fails. The parallel port test performs the following tests:
• Mode Test — Tests the different modes of the Extended Capabilities Port (ECP). The following
modes are tested:
– Standard Mode (unidirectional)
– Byte Mode (a bi-directional mode, also called Reverse Mode)
– Parallel Port FIFO Mode (SPP hardware-handshake)
– EPP Mode (may not be available depending on chipset)
– ECP FIFO Mode (ECP hardware-handshake)
– FIFO Test Mode (test mode to determine FIFO depth)
– Configuration Mode (cnfgX registers are available)
NOTE: The Mode test may disrupt normal operation of a device connected to the parallel port, for example, a
printer that is printing.
• Parallel Port Register Test — Tests the parallel port registers using a write-read strategy, for example,
writing some data into the register, reading the data of the same registry and verifying it against the
data written (data-pattern, walking-bit). The following registers are tested:
– Standard Parallel Port (SPP) Registers: Control, Data, and Status Port registers
– Extended Parallel Port (EPP) Registers: Address and EPP Data Port registers
– Extended Capabilities Port (ECP) Register: Extended Control Register (ECR)
– ECP Configuration Registers A and B (cnfgA, cnfgB)