| The Linux SCSI subsystem in 2.4 | ||
|---|---|---|
| Prev | Appendix D. Compile options and System calls including ioctls | Next |
Most of the following compile options can be overridden with boot/module parameters and/or runtime configuration (i.e. ioctls).
The following parameters are defined in linux/drivers/scsi/st_options.h
ST_NOWAIT {0}
ST_IN_FILE_POS {0}
ST_RECOVERED_WRITE_FATAL {0}
ST_DEFAULT_BLOCK {0}
ST_BUFFER_BLOCKS {32}
ST_WRITE_THRESHOLD_BLOCKS {30}
ST_MAX_BUFFERS {4}
ST_MAX_SG {16}
ST_FIRST_SG {8}
ST_FIRST_ORDER {5}
ST_TWO_FM {0}
ST_BUFFER_WRITES {1}
ST_ASYNC_WRITES {1}
ST_READ_AHEAD {1}
ST_AUTO_LOCK {0}
ST_FAST_MTEOM {0}
ST_SCSI2LOGICAL {0}
ST_SYSV {0} |
The following parameters are defined in linux/drivers/scsi/st.c
ST_TIMEOUT {900*HZ}
ST_LONG_TIMEOUT {14000*HZ} |
The Linux tape interface is defined in /usr/src/linux/include/linux/mtio.h .
The following ioctl()s are listed in alphabetical order with a brief explanation to the right. [See st documentation (especially man 4 st) for more details.]
MTIOCTOP [execute tape commands and set drive/driver options] MTIOCGET [get the status of the drive] MTIOCPOS [get the current tape location] open() O_RDONLY, O_RDWR close() read() write() ioctl() |