HP Surestore 64 - Director Switch User Manual page 109

Monitoring and Managing the Director
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.
Delimiter errors—The number of times that the director detected an
unrecognized start-of-frame (SOF) delimiter, an unrecognized end-of-frame
(EOF) delimiter, or an invalid class of service. This indicates that the frame
arrived at the director's port corrupted. This corruption can be due to
plugging/unplugging the link, bad optics at either end of the cable, bad cable,
or dirty or poor connections. Moving the connection around or replacing
cables can isolate the problem.
Director Product Manager User Guide 109