User Guide

Ampex 1308911-02 6-47
DD-2 Utilities Manual Pages dd2_setparam_drive
blksize Integer that specifies the data block size in bytes. Valid for write
operations only (read operations adjust to the existing block size).
This value must be the same for all data blocks within a file section
and can be 1 or any even number from 80 through 1199838. The
block size does not include the two-byte checksum, if any. If
checksums are disabled, the maximum block size is 1199840.
dbglevel Integer representing a bit mask that specifies the tape device driver
debug level. The tape device driver sends debugging messages to
the host system console and the system error log as specified by this
value. Though primarily intended for tape device driver debugging,
you can also use this capability to display tape drive controller
commands, status, and results. However, enabling debug messages
may significantly reduce tape drive performance.
The following debug level definitions are valid. To disable all debug
messages, set dbglevel to zero (0).
Debug Level, Value, Description
DST_DBG_NONE, 0x00000000, ":No debug messages:"
DST_DBG_MODULE, 0x00000001, ":Module install/remove messages:"
DST_DBG_AUTOCONFIG, 0x00000002, ":Autoconfiguration messages:"
DST_DBG_UNIT_ATTN, 0x00000004, ":Unit Attention messages:"
DST_DBG_OPEN, 0x00000008, ":Open() messages:"
DST_DBG_CLOSE, 0x00000010, ":Close() messages:"
DST_DBG_RW, 0x00000020, ":Read/write messages:"
DST_DBG_IOCTL, 0x00000040, ":Ioctl() messages:"
DST_DBG_RETRY, 0x00000080, ":Retry messages:"
DST_DBG_INTERRUPT, 0x00000100, ":Interrupt messages:"
DST_DBG_PARAMETERS, 0x00000200, ":Print command parameters:"
DST_DBG_RESULTS, 0x00000400, ":Print command result info:"
DST_DBG_STATUS, 0x00000800, ":Print device status info:"
DST_DBG_COMMAND, 0x00001000, ":Device command messages:"
DST_DBG_ABSTRACT, 0x00002000, ":Abstract interface messages:"
DST_DBG_LOG_SENSE, 0x00004000, ":Log sense info:"
DST_DBG_TIMING, 0x00008000, ":Timing messages:"
DST_DBG_ERROR, 0x01000000, ":show error condition:"
DST_DBG_ENTRY, 0x02000000, ":show entry/leave of functions:"
DST_DBG_ARGS, 0x04000000, ":show arguments:"
DST_DBG_WARNING, 0x08000000, ":show warning:"
ENVIRONMENT
The $TAPE environment variable specifies the tape device to use if the
-f <device_special_file> option is omitted.