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tz(4) tz(4)
Name
tz - SCSI magnetic tape interface
Syntax
VAX NCR 5380:
adapter uba0 at nexus?
controller scsi0 at uba0 csr 0x200c0080 vector szintr
tape tz0 at scsi0 drive 0
VAX DEC SII:
adapter ibus0 at nexus?
controller sii0 at ibus? vector sii_intr
tape tz0 at sii0 drive 0
RISC DEC SII:
adapter ibus0 at nexus?
controller sii0 at ibus? vector sii_intr
tape tz0 at sii0 drive 0
RISC DEC KZQ:
adapter uba0 at nexus?
controller kzq1 at uba0 csr 0761300 vector kzq_intr
tape tz8 at kzq1 drive 0
controller kzq2 at uba0 csr 0761400 vector kzq_intr
tape tz16 at kzq2 drive0
RISC NCR ASC:
adapter ibus0 at nexus?
controller asc0 at ibus? vector ascintr
tape tz0 at asc0 drive 0
Description
The SCSI tape driver provides a standard tape drive interface as
described in This is a driver for any Digital SCSI tape device.
For the TZK10 QIC format tape drive, the densities supported are QIC-24
(read only) block size of 512 byte blocks, QIC-120, and QIC-150
read/write block size of 512 byte blocks, and QIC-320 read/write block
size of 1024 byte blocks. With QIC format style tapes all reads and
writes must be in multiple of the block size. This is a requirement of
fixed block tape drives because record boundaries are not preserved.
The QIC densities are selected using the following special device
names:
QIC-24 Fixed block size.
QIC-120 Fixed block size.
QIC-150 Fixed block size.
QIC-320 Fixed block size.
With all fixed block tape devices a of a file to the tape must be
padded out. An example of this is a of which has a size of approxi‐
mately 3800 bytes.
dd if=/etc/gettytab of=/dev/rmt0h bs=10k conv=sync
or
dd if=/etc/gettytab of=/dev/rmt0l bs=512 conv=sync
The option of pads the output to block size.
This driver also supports n-buffered reads and writes to the raw tape
interface (used with streaming tape drives). See for further details.
Tape Support
Consult the ULTRIX Software Product Description to determine which
drives are supported for different CPU types and hardware configura‐
tions.
Diagnostics
All diagnostic messages are sent to the error logger subsystem.
Files
See Also
mtio(4), nbuf(4), SCSI(4), MAKEDEV(8), uerf(8), tapex(8)
Guide to the Error Logger
tz(4)
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