NAME

cpqs − COMPAQ SCSI tape device

DESCRIPTION

The cpqs device driver provides the interface to the COMPAQ 325/525Mb streaming tape device.  The device is an AT bus adapter that, if used in an EISA machine, requires EISA configuration.  Up to four tape units may be connected to this adapter, including 4-mm DAT units.  The driver supports hardware compression on adapters so equipped.  When opened for reading or writing, the tape is presumed to be positioned as desired for the operation.  On close, the tape is rewound or left at the current position, depending on the device selection. 

Ioctl Calls

The following ioctl(2) system calls are available from <sys/tape.h>:

MT_RESET
Reset the tape device.

MT_WFM
Write a filemark at the current tape position.

MT_RFM
Read from the current tape position until a filemark is found.

MT_REWIND
Rewind the tape.

MT_RETEN
Retension the tape.

MT_ERASE
Erase the data on the entire tape.

FILES

/dev/[i][n][c]rct0[-150]
i = return immediately
n = no rewind
c = enable compression
−150 = write QIC150 format (512 bytes per block)

SEE ALSO

backup(1M), cpio(1), dd(1M), restore(1M), tar(1). 
dump(1) in the INTERACTIVE SDS Guide and Programmer’s Reference Manual.

ADDED VALUE

This entry, supplied by INTERACTIVE Systems Corporation, is an extension of UNIX System V. 

\*U  —  Version 1.0