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

Command Line User Interface 181
Command Line User Interface
Total Uncorrected Read Errors DISK-PORTS The total number of blocks for which an unrecoverable
data error has occurred.
Usage
Each of the read error counters provides a general
indication of the quality of read operations. Any
significant counts in any of the read error counters is an
indication that drive operational quality may be having an
effect on performance.
Total Uncorrected Write Errors DISK-PORTS The total number of blocks for which an unrecoverable
data error has occurred.
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.
Transfer Length range ARRAY
LUN
The number of read and write commands completed
whose data transfer lengths fall within the length range
specified by the metric. The data transfer lengths are
specified in bytes. The supported length ranges are:
0-2047 bytes
2048-4095 bytes
4096-8191 bytes
8192-16383 bytes
16384-32767 bytes
32768-65535 bytes
65536-131071 bytes
131072-262143 bytes
>262143 bytes
Usage
This set of metrics provides a summary of the data transfer
length characteristics of the host workload. This
information can be useful in determining expected
performance levels and in discovering possible
performance optimizations for the array and for the
system it is configured into.
Table 12 Performance Metrics (Continued)
Metric Categories Description/Usage