User Guide

5-28 Ampex 1308911-02
Model No.
Running Head
dst_getdrive_ex libdd2 API Functions
DST_EOR_BLOAD - search forward after load
DST_PARK_ANY - park anywhere
DST_CHECKSUM - enable data block checksums
rdretryct Read retry count. The default is 5. The range is 0-255.
wrretryct Write retry count. The default is 5. The range is 0-255.
wrbuffull Write buffer full ratio, divided by 256 to obtain percentage. The default
is 0. The range is 0 or 1-255. A value of zero indicates that the drive
waits until the its buffer is half full before writing to tape.
rdbuffull Read buffer full ratio, divided by 256 to obtain percentage. The default
is 0. The range is 0 or 1-255. A value of zero indicates that the drive
begins retrieving data from tape when its buffer is half empty.
wrdelay Write delay time, multiplied by 100 milliseconds. The default is 0. The
range is 1-65535.
sctimeout Scanner time-out in minutes. The default is 5. The range is 0-30.
thtimeout Thread time-out in seconds. The default is 15. The range is 6-30.
ewoffset Early Warning (EW) offset before End of Media Warning (EMW), in
physical blocks. The default is 100. The range is 0-1677215.
cleantime Cleaning time in seconds when using a head cleaning cartridge. The
default is 5. The range is 1 - 65535.
ddver A structure of tape device driver version information.
typedef struct
{
char drvversion[80]; /* Driver version number/ID */
char notes[80]; /* Notes */
char comments[80]; /* Comments */
} dst_ddver_st;
version - 80-byte character array that reports the current tape device
driver version (for example “4.0”).
notes - 80-byte character array that provides a short description on
the latest changes or added functionality (such as “Now Supports
AIX”).
comments - 80-byte character array that reports the tape device
driver’s release date (for example “Released 31st July 1996”).