NAME

dd − SCSI tape driver

DESCRIPTION

The ct driver operates the QIC150 SCSI tape drive. 

The drives currently supported are the Commodore A3070, Caliper, Sankyo, and Wangtek 150MB 1/4-inch cartrige tape drives. 

The formats that can be read and written are QIC150 (150mb/600ft) and QIC120 (120mb/600ft). 

FILES

/dev/rmt/4∗4 - scsi id 4

/dev/rmt/∗h∗high-density - 150mb format

/dev/rmt/∗l∗low-density - 120mb format

/dev/rmt/∗a∗append at end of existing data

/dev/rmt/∗n∗no rewind after reading or writing

SEE ALSO

bru(1A), amixpkg(1A), mt(1b), cpio(1), tar(1), zpio(1l)

NOTES

Driver behavior is undefined if the addressed SCSI device is not a tape drive. 

Use the mt retension command to retension a cartrige before writing.  Use a large enough buffer when reading and writing tapes to promote streaming.  These measures will reduce the chance of media errors when reading the tape. 

Use the correct density device (h vs l) to read a cartrige.  Otherwise some drives will produce a blank-check error after reading the first track, about 8.3MB. 

SCSI ID 4 is the default configuration of the A3070 tape drive. 

  —  Last change: 18-jul-91