HP StorageWorks 2/140 director product manager user guide - Page 99

Monitoring and Managing the Director Error Statistics Port errors indicate that a port is not operating correctly. Use this data to isolate problems with port and link operations. The statistics in this table include: • Link failures-A link failure was recorded in response to a not operational sequence (NOS), protocol timeout, or port failure. At the Port Card View, a yellow triangle displays to indicate a link incident, or a blinking red and yellow diamond displays to indicate a port failure. • Sync losses-A loss of synchronization was detected because the attached device was reset or disconnected from the port. At the Port Card View, a yellow triangle displays to indicate a link incident. • Signal losses-A loss of signal was detected because the attached device was reset or disconnected from the port. At the Port Card View, a yellow triangle displays to indicate a link incident. • Primitive sequence errors-An incorrect primitive sequence was received from the attached device, indicating a Fibre Channel link-level protocol violation. At the Port Card View, a yellow triangle displays to indicate a link incident. • Discarded frames-A received frame could not be routed and was discarded because the frame timed out (insufficient buffer-to-buffer credit) or the destination device was not logged into the director. • Invalid transmission words-The number of times that the director detected invalid transmission words from the attached device. This indicates that a frame or primitive sequence arrived at the director's port corrupted. This corruption can be due to the attached device performing a reset, plugging or unplugging the link, bad optics at either end of the cable, bad cable, or a dirty or poor connection. Moving the connection around or replacing cables can isolate the problem. Some number of invalid transmission words are expected and acceptable. Invalid transmission words within a frame are used to produce the bit-error threshold link incident. If one or more invalid transmission words are detected in 12 separate 1.5-second samples within five minutes, a bit-error threshold link incident is generated. • CRC errors-A received frame failed a cyclic redundancy check (CRC) validation, indicating the frame arrived at the director's port corrupted. Frame corruption may be caused by device disconnection, an optical transceiver failure at the device, a bad fiber-optic cable, or a poor cable connection. director product manager user guide 2-39