User Guide

Ampex 1308911-02 6-43
DD-2 Utilities Manual Pages dd2_set_drive
tdconfig This bit mask specifies the tape drive configuration as a
hexadecimal value representing the enabled options. The following
definitions apply:
To determine the current configuration, use the dd2_query_drive
utility. The default is Sync on Early Warning with checksums
enabled (0x12).
rdretry The Read Retry Count parameter specifies the maximum number of
retries to read a physical block from tape. The default setting is 5.
The range is 0-255.
wrretry The Write Retry Count parameter specifies the maximum number
of retries to write a physical block to tape. The default setting is 5.
The range is 0-255.
wrfull The Write Buffer Full parameter specifies how full the buffer should
be before the drive starts writing data to tape. This setting is divided
by 256 to obtain percentage. The range is zero or 1-255. Zero is the
default and specifies that the drive wait until the buffer is half full
before writing data to tape.
rdempty The Read Buffer Empty parameter specifies how empty the buffer
should be before the drive retrieves additional data from tape. This
setting is divided by 256 to obtain percentage. The range is zero or
1-255. Zero is the default and specifies that the drive wait until the
buffer is half empty before reading data from tape.
wrdelay The Write Delay Time parameter specifies the maximum time that
the drive waits before it writes any buffered data to tape. The time
is measured in 100 millisecond increments from the last buffered
write command that did not cause the buffer to exceed the Write
Buffer Full Ratio. The default value of zero specifies that there is no
time-out and the data remains in the buffer until a subsequent
command writes the data to tape. The range is 1-65535 (multiplied
by 100 milliseconds.
Value Strings
0x00000001 ":Post internal retry errors (deflt disable):"
0x00000002 ":Synchronize buffer at EW (deflt able):"
0x00000004 ":Search forward after load (deflt disable):"
0x00000008 ":Park anywhere (deflt disable):"
0x00000010 ":Enable data block checksums (deflt able):"