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

154 Command Line User Interface

Corrected Read Errors Without

Delay

DISK-PORTS An error correction was applied to get perfect data (like

ECC on-the-fly). "Without substantial delay" means the

correction did not postpone reading of later sectors (e.g.,

a revolution was not lost). The counter is incremented once

for each logical block that requires correction. Two

different blocks corrected during the same command are

counted as two events

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.

Corrected Read Errors With Delay DISK-PORTS An error code or algorithm (e.g., ECC, checksum) is

applied in order to get perfect data with substantial delay.

"With possible delay" means the correction took longer

than a sector time so that writing of subsequent sectors

was delayed (e.g., a lost revolution). The counter is

incremented once for each logical block that requires

correction. A block with a double error that is correctable

counts as one event and two different blocks corrected

during the same command count as two events.