HP B6960-90078 manual 576, Error statistics Explanation

Troubleshooting

Troubleshooting Devices and Media

If you receive media related errors during write operations, or if the medium is marked as poor, you can check the media.log file for media errors statistics. You can do this also when receiving media related errors during read operations.

Media.log file contains the following error statistics:

Error statistics	Explanation
errsubdel=n	errors corrected with substantial delays
errposdel=n	errors corrected with possible delays
total=n	total number of re-writes
toterrcorr=n	total number of errors corrected and
	recovered while writing
totcorralgproc=n	total number of times correction
	algorithm processed
totb=n	total bytes processed (write)
totuncorrerr=n	total number of uncorrected errors (write)

	where n stands for number of errors.
	If a parameter has the value -1, it means that the device does not
	support this statistic parameter. If all parameters have the value -1, it
	can either mean that during processing the tape quality statistics an
	error occurred or the device does not support medium quality statistics
	at all.
	Although the tape statistical results are reported in bytes for total
	bytes processed, this is not true for all devices. LTO and DDS devices
	report data sets and groups, respectively, and not bytes.
Examples	Here are a few examples from the media.log file:
	• Log sense write report for DLT/SDLT devices - total bytes processed.
	Media ID from tape= 0fa003bd:3e00dbb4:2310:0001; Medium Label=
	DLT10; Logical drive= dlt1; Errors corrected no delay= 0; Errors
	corrected delay= 0; Total= 13639; Total errors corrected= 13639;
	Total correction algorithm processed= 0; Total bytes processed=
	46774780560; Total uncorrected errors= 0
	46774780560 bytes of native data after compression were processed
	(a full DLT8000 tape).

576 Chapter 12