Fibre Channel port errors

Errors that occurred during transmission of data through Fibre Channel ports (also referred to as I/O ports) over the past 24 hours are displayed in the Error Rates for I/O Port window on the Network settings page.

ID
The fully qualified port ID.
Total errors
The total number of errors that were detected on the Fibre Channel port.
Error frame
A Fibre Channel frame was received that was not consistent with Fibre Channel protocol. A frame is a string of transmission words that are prefixed by an SOF delimiter and followed by an EOF delimiter.
Link failure
Fibre Channel connectivity with the port was broken. This type of error can occur when the system connected to the port is restarted, replaced, or serviced and the Fibre Channel cable that is connected to the port is temporarily disconnected. It could also indicate a faulty connector or cable. Link failures result in degraded performance of the Fibre Channel port until the failure is fixed.
Loss of sync
A synchronization loss error was detected on the Fibre Channel link. This type of error can occur when the system connected to the port is restarted, replaced, or serviced and the Fibre Channel cable connected to the port is temporarily disconnected. It could also indicate a faulty connector or cable. If a synchronization loss error persists, it can result in a link failure error.
Loss of signal
A loss of signal was detected on the Fibre Channel link. This type of error can occur when the system connected to the port is replaced, or serviced and the Fibre Channel cable connected to the port is temporarily disconnected. It could also indicate a faulty connector or cable. If a loss of signal error persists, it can result in a link failure error.
CRC error
A Fibre Channel frame was received with cyclic redundancy check (CRC) errors. This type of error is usually fixed when the frame is retransmitted. This type of error is usually recoverable and does not degrade system performance, unless the error persists and data cannot be relayed after retransmission.
Primitive sequence protocol error
A primitive sequence protocol error was detected. A primitive sequence is an ordered set that is transmitted and repeated continuously to indicate specific conditions within the port. The set might also indicate conditions that are encountered by the receiver logic of the port. This type of error occurs when an unexpected primitive sequence is received.
Transmission word count
A bit error was detected. A transmission word is the smallest transmission unit that is defined in Fibre Channel. This unit consists of four transmission characters, 4 x 10 or 40 bits. This type of error can include code violations, invalid special code alignment, and disparity errors.
Link reset transmitted
The state of the Fibre Channel port changed from active (AC) to link recovery (LR1).
Link reset received
The state of the Fibre Channel port changed from active (AC) to link recovery (LR2) state.
Out of order data
A missing frame was detected. The frame was either missing from a data sequence or it was received beyond the Fibre Channel port's sequence reassembly threshold.
Out of order ACK
An out of order acknowledgment (ACK) frame was detected. ACK frames signify that the transmission was received. The frame was either missing from a data sequence or it was received beyond the Fibre Channel port's sequence reassembly threshold.
Duplicate frame
A frame that was detected as previously processed was received.
Invalid relative offset
A frame with an invalid relative offset parameter in the frame header was received.
Sequence timeout
The Fibre Channel port detected a timeout condition when a sequence initiator was received.
Uncorrectable bad blocks
A data block with errors could not be fixed by forward error correction (FEC).
Correctable bad blocks
A data block with errors was fixed by forward error corrections (FEC).
Transport mode write retries
A transport mode write operation retry was requested. The buffer was not large enough to receive unsolicited data.