Sequential Access Device log page

The Sequential Access Device Log page is page 0Ch. The Page Length is 40h. Five parameters are supported, all eight bytes long. With the exception of 0100h (cleaning required), they are updated when a data set is logically written and cleared at the start of tape load; the values of each parameter relate to the current tape.

Parm. Description

0001h The number of data bytes received from application clients during write command operations. This is the number of bytes transferred over SCSI, before compression.

0002h The number of data bytes written to the media as a result of write command operations, not counting the overhead from ECC and formatting. This is the number of data bytes transferred to media, after compression.

0003h The number of data bytes read from the media during read command operations, not counting the overhead from ECC and formatting. This is the number of data bytes transferred from media with compression.

0004h The number of data bytes transferred to the initiator or initiators during read command operations. This is the number of bytes transferred over SCSI, after decompression.

0100h Cleaning required, a non-volatile cleaning indication.

A non-zero value of parameter 0100H (cleaning required) relates to the drive It indicates that a condition requiring cleaning has been detected and a subsequent cleaning cycle has not yet been completed. The parameter is updated asynchronously. It persists across hard resets and power cycles, and is cleared when a cleaning cycle is performed.

Commands

LOG SENSE 4Dh 61