ampex-data dstdis tape drive programmer s guide, part no. 1308911-02 ユーザーズマニュアル

 

iii

 

Addendum

 

Addendum

 

Introduction

 

This addendum provides supplementary information applicable to using the libdd2 API 
version 6.0 with SGI Irix 6.5 tpsc magnetic tape (mt) and devscsi passthru (pt) devices, or Irix 
6.4 TDR tpsc devices. The information covers only those features that are unique to the IRIX 
TDR5 configuration. See the remainder of the document for information on other features that 
are common to all supported UNIX platforms.

 

API Functions

 

In the IRIX TDR5 environment, the 

 

 API uses the SGI 

 

 or 

 

 driver rather than 

the Ampex DST tape device driver. Those functions that could not be implemented through 
the 

 

 interface to the 

 

 driver were replaced by SCSI passthru versions that use the 

 

 

interface to the 

 

 driver.

 

•

 

The following functions, identified by the suffix

 

 _pt, 

 

use the passthru interface to the 

 

 driver. They behave the same as the standard functions that are available on other 

 for details.

Passthru Functions

Standard Functions

 

•

 

The following functions use the 

 

 interface to the 

 

 device driver but behave 

differently than on other supported platforms. When referring to the manual pages in 

, note the following:

–

 

 reports only those attributes that are available under IRIX TDR5 

–

 

 is not capable of setting the device driver debug level. In addition 

it can set the data block size only when the drive is positioned to BOT or 
immediately after a filemark.