User Guide

Ampex 1308911-02 5-53

libdd2 API Functions dst_setparam

DST_DBG_RETRY - Outputs statements associated with SCSI

command retry attempts.

DST_DBG_INTERRUPT - Outputs statements associated with the

handling of tape device driver interrupts.

DST_DBG_PARAMETERS - Each SCSI command descriptor block

(cdb) is displayed before being sent to the tape drive; this allows

invalid settings to be checked.

DST_DBG_RESULTS - Outputs statements associated with the drive

receiving SCSI Request Sense data.

DST_DBG_STATUS - Outputs statements associated with the drive

performing SCSI Mode Select/sense commands, which set or get

tape drive operational settings.

DST_DBG_COMMAND - Outputs statements associated with SCSI

commands which are initiated and processed within the device

driver.

DST_DBG_ABSTRACT - Outputs statements associated with the use of

the DD-2 interface (

dstioctop ioctl).

DST_DBG_LOG_SENSE - Outputs statements associated with Log

Sense statistics gathering.

DST_DBG_TIMING - Outputs the results when various timing

functions are turned on.

DST_DBG_ERROR - Shows error condition.

DST_DBG_ENTRY - Shows entry/exit of functions.

DST_DBG_ARGS - Shows arguments.

DST_DBG_WARNING - Shows warning messages.

attributes This member is not used by dst_setparam() since the tape device driver

interface parameter settings can only be changed by specifying a new

device special ﬁle in the open call. To check current settings, use the

dst_getparam() function.

RETURN VALUES

The return value is DST_SUCCESS (0) or DST_FAILURE (-1). See the “DST API Overview”

on page 5-1 for information on

errno failure messages and associated DST result codes.