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tape - information on filer tape interface
The filer supports up to four local tape drives (tape drives
connected directly to the system). The tape drive interface
follows a UNIX-like device name allowing use of a rewind,
norewind or unload/reload device. The format of a filer
tape device name is crstud where:
- c
- use n to specify the norewind device, use u to
specify the unload/reload device, or no flag to
specify the rewind device. The norewind device
will not rewind when the tape device is closed.
The unload/reload device is used with sequential
tape loaders and will unload the current
tape volume and attempt to load the next tape
volume (note that the server will wait up to
one minute for the next volume to become ready
before aborting the reload of the next volume).
The rewind device will rewind the tape volume
to beginning-of-tape on close.
- rst
- the rst portion of the device name is always
present and specifies that you are requesting a
SCSI tape device.
- u
- the logical unit number of the tape drive to
use.
- d
- the density (or format) to use for tape write
operations.
The density specifications for an Exabyte 8505 8mm drive
are:
- l
- Exabyte 8200 format, no compression
- m
- Exabyte 8200 format with compression
- h
- Exabyte 8500 format, no compression
- a
- Exabyte 8500 format with compression
The sysconfig -t command will display the supported tape
drives on your system and the device names associated with
each tape device along with the device's density, or format.
The following is an example of the output from a sysconfig
command on a filer with one tape device attached:
toaster> sysconfig -t
Tape drive (0.6) Exabyte 8505 8mm
rst0l - rewind device, format is: EXB-8200 2.5GB
nrst0l - no rewind device, format is: EXB-8200 2.5GB
urst0l - unload/reload device, format is: EXB-8200 2.5GB
rst0m - rewind device, format is: EXB-8200C (w/compression)
nrst0m - no rewind device, format is: EXB-8200C (w/compression)
urst0m - unload/reload device, format is: EXB-8200C (w/compression)
rst0h - rewind device, format is: EXB-8500 5.0GB
nrst0h - no rewind device, format is: EXB-8500 5.0GB
urst0h - unload/reload device, format is: EXB-8500 5.0GB
rst0a - rewind device, format is: EXB-8500C (w/compression)
nrst0a - no rewind device, format is: EXB-8500C (w/compression)
urst0a - unload/reload device, format is: EXB-8500C (w/compression)
na_dump(1) na_mt(1), na_sysconfig(1)
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