HP StorageWorks 2.140 Director Switch - Manual (Page 80)

Monitoring and managing the director 80
• 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 is displayed 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 is displayed 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 is displayed 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 5 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), 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 or 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.
• Address ID errors—A received frame had an unavailable or invalid Fibre Channel destination
address or an invalid Fibre Channel source address. This typically indicates the destination
device is unavailable.
• Frames too short—A received frame exceeded the Fibre Channel frame maximum size or was
less than the Fibre Channel minimum size, 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.