HP Surestore 64 - Director Switch User Manual page 111

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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 appears to indicate a
link incident, or a blinking red and yellow diamond appears to indicate a port failure.
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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 appears to
indicate a link incident.
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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 appears to indicate a link
incident.
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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
appears to indicate a link incident.
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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.
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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
Performance View 95