HP Visualize J5000 hp Visualize J5000, J7000 workstations owner's guide (a4476 - Page 93

Device files are special files that tell your system which system hardware pathway to use when communicating with a specific device and what kind of device it is. Using Device Files Your system has four default device files for use with your tape drive: two device files for noncompressed mode and two device files for compressed mode. If you use these device files, you do not need to create any device files. If the SCSI address of your tape drive is not set to the factory default of SCSI ID 3, you must create a device file, then substitute the pathname of your device file in the examples that follow. Refer to the System Administration Tasks manual for information on how to create a device file. NOTICE: The device file names used in these examples are appropriate only for systems running HPUX 9.05. If you are using HP-UX 10.0 or later, the device file names will depend on the naming conventions of your particular system. See "SCSI and Device File Information for HP-UX 10.0 or Later" in Chapter 1 of this book. Device Files - No Data Compression Your system has two device files for using your tape drive with data compression turned off. The device files are named /dev/rmt/3m and /dev/rmt/3mn, and are set for SCSI ID 3. If you use the /dev/rmt/3m device file, the tape drive rewinds the data cassette every time the system releases the drive from its control. If you use the /dev/rmt/3mn device file, the drive does not rewind the data cassette. The tape stays where it was after the last operation. If you use these device files, you do not need to create any device files. 4-12