HP StorageWorks Command View SDM Installation and User Guide (T1086-96023, February 2005)

156 Command Line User Interface
Corrected Write Errors With Retry DISK-PORTS Specifies the counter counting the number of errors that
are corrected by applying retries. This counts errors
recovered, not the number of retries. If five retries were
required to recover one block of data, the counter
increments by one, not five. The counter is incremented
once for each logical block that is recovered using retries.
If an error is not recoverable while applying retries and is
recovered by ECC, it isn't counted by this counter; it will
be counted by the counter "Corrected Write Errors With
Delay".
Usage
Each of the write error counters provides a general
indication of the quality of write operations. Any
significant counts in any of the write error counters is an
indication that drive operational quality may be having an
effect on performance.
Discarded Frame Count FRONTEND-
PORT,
BACKEND-
PORT
The number of frames received and discarded for any of
the following reasons:
- Bad CRC with EOFdti or EOFni delimiter
- Code violation (invalid character or running disparity)
-EOFdti or EOFni
- Fill byte error
- Frame smaller than 24 bytes
- First frame of a link down
- Payload larger than 1024 bytes
- Unexpected K character
Usage
Each of the port error counters provides a general
indication of the quality of port operation. Any significant
counts in any of the port error counters is an indication
that port or link operational quality may be having an
effect on performance.
Compatibility
FRONTEND-PORT metrics are available for all products.
BACKEND-PORT metrics are available for VA 7410 only.
Table 12 Performance Metrics (Continued)
Metric Categories Description/Usage