IBM TS2340 User Guide - Page 97

HP-UX Device Driver (ATDD) To change the value of tunable, run the command kctune/kmtune or SAM (System Administration Manager) tool. Special Files For each drive configured by ATDD, twelve or thirteen special files are created: twelve special files are generated for a 3590 with ACF set to Manual, Automatic, System, Accumulate, Random, or Library mode. A thirteenth special file is created for independent operation of the ACF, if the 3590 mode is set to Random 2 LUN operation (/dev/rmt/chng). ATDD creates the tape device special files in three forms: the standard or long file name, an alternative short file name based on the instance number, and an alternative short file name not based on the instance number. BEST represents the operational capabilities likely to be required, including the highest density/format and data compression, if supported by the device. Each set of special file names (long and short) contains four special files that have all combinations of n and b options, as shown in Table 11 and Table 12. For more information, refer to the mt(7) man pages. Table 11. Special Files Special File Name /dev/rmt/m /dev/rmt/mb /dev/rmt/mn /dev/rmt/mnb /dev/rmt/sm /dev/rmt/smb /dev/rmt/smn /dev/rmt/smnb /dev/rmt/tdBEST /dev/rmt/tdBESTb /dev/rmt/tdBESTn /dev/rmt/tdBESTnb /dev/rmt/chng BSD Compatibility No Yes No Yes No Yes No Yes No Yes No Yes N/A Rewind on Close Yes Yes No No Yes Yes No No Yes Yes No No N/A Table 12. New Special Files in HP-UX 11i v3 Special File Name /dev/rtape/tape#_BEST /dev/rtape/tape#_BESTb /dev/rtape/tape#_BESTn /dev/rtape/tape#_BESTnb /dev/rchgr/autoch# BSD Compatibility No Yes No Yes N/A Rewind on Close Yes Yes No No N/A v In HP-UX 11.0, 11i v1 and v2: atdd_lssf in /opt/OMImag/bin for the static driver and in /opt/atdd/bin for the DLKM driver lists information about a special file. For example: Chapter 4. HP-UX Tape and Medium Changer Device Driver 79