Technical data

st(7D) Devices SunOS 5.5
ST_VARIABLE
The flag indicates the tape device supports variable length record sizes.
ST_QIC
The flag indicates a Quarter Inch Cartridge (QIC) tape device.
ST_REEL
The flag indicates a 1/2−inch reel tape device.
ST_BSF If flag is set, the device supports backspace over EOF marks (bsf - see
mt(1)).
ST_BSR
If flag is set, the tape device supports the backspace record operation (bsr
- see mt(1)). If the device does not support bsr, the st driver emulates the
action by rewinding the tape and using the forward space record (fsf)
operation to forward the tape to the correct file. The driver then uses for-
ward space record (fsr - see mt(1)) to forward the tape to the correct
record.
ST_LONG_ERASE
The flag indicates the tape device needs a longer time than normal to
erase.
ST_AUTODEN_OVERRIDE
The auto-density override flag. The device is capable of determiningthe
tape density automatically without issuing a “mode-select”/“mode-
sense command”.
ST_NOBUF
The flag disables the device’s ability to perform buffered writes. A buf-
fered write occurs when the device acknowledges the completion of a
write request after the data has been written to the device’s buffer, but
before all of the data has been written to the tape.
ST_KNOWS_EOD
If flag is set, the device can determine when EOD (End of Data) has been
reached. When this flag is set, the st driver uses fast file skipping. Other-
wise, file skippinghappens one file at a time.
ST_UNLOADABLE
The flag indicates the device will not complain if the st driver is
unloaded and loaded again (see modload(1M) and modunload(1M)).
That is, the driver will return the correct inquiry string.
ST_SOFT_ERROR_REPORTING
The flag indicates the tape device will perform a “request sense” or “log
sense” command when the device is closed. Currently, only Exabyte and
DAT drives support this feature.
ST_LONG_TIMEOUTS
The flag indicates the tape device requires timeouts that are 5 times
longer than usual for normal operation.
7D-306 modified 30 Aug 1995