Lines Matching +full:non +full:- +full:default
1 .. SPDX-License-Identifier: GPL-2.0
23 flexible method and applicable to single-user workstations. However,
27 2. The system manager (root) can define default values for some tape
32 drive performs auto-detection of the tape format well (like some
33 QIC-drives). The result is that any tape can be read, writing can be
34 continued using existing format, and the default format is used if
37 does not perform auto-detection well enough and there is a single
40 or not :-).
46 3. By default, up to four modes can be defined and selected using the minor
57 between formats in multi-tape operations (the explicitly overridden
72 limits). Both the auto-rewind (minor equals device number) and
73 non-rewind devices (minor is 128 + device number) are implemented.
86 of the tape with one or two partitions. By default support for
90 By default the driver writes one filemark when the device is closed after
128 dev_upper non-rew mode dev-lower
129 20 - 8 7 6 5 4 0
131 The non-rewind bit is always bit 7 (the uppermost bit in the lowermost
132 byte). The bits defining the mode are below the non-rewind bit. The
143 and non-rewind entries for each mode. The names are stxy and nstxy, where x
151 the defaults set by the user. The value -1 means the default is not set. The
166 directory corresponding to the mode 0 auto-rewind device (e.g., st0).
179 regular expression "^st[0-9]+$"
191 - The number of I/Os currently outstanding to this device.
193 - The amount of time spent waiting (in nanoseconds) for all I/O
198 - The number of I/Os issued to the tape drive other than read or
200 following calculation io_ms-read_ms-write_ms.
202 - The number of bytes read from the tape drive.
204 - The number of read requests issued to the tape drive.
206 - The amount of time (in nanoseconds) spent waiting for read
209 - The number of bytes written to the tape drive.
211 - The number of write requests issued to the tape drive.
213 - The amount of time (in nanoseconds) spent waiting for write
216 - The number of times during a read or write we found
217 the residual amount to be non-zero. This should mean that a program
250 The default is BSD semantics.
257 is not possible, a driver buffer allocated at run-time is used. If
262 - one or more pages are at addresses not reachable by the HBA
263 - the number of pages in the transfer exceeds the number of
265 - one or more pages can't be locked into memory (should not happen in
273 allowed if ST_BUFFER_WRITES is non-zero and direct i/o is not used.
280 -b option) may have had good throughput but this is not true any more with
282 is to use bigger write() byte counts (e.g., tar -b 64).
291 tape after the early-warning mark to flush the driver buffer.
298 Scatter/gather buffers (buffers that consist of chunks non-contiguous
309 the size and tries again until the size of one page. The default
317 are used to extend the buffer at run-time if this is necessary. The
330 returns -1 and errno is set to ENOSPC. To enable writing a trailer,
332 bytes is returned. After this, -1 and the number of bytes are
349 tape drive if this is non-zero
353 set, the write threshold is set to the new buffer size - 2 kB.
368 the driver as module. If several parameters are set, the keyword-value
381 - aa is the buffer size for fixed block mode in 1024 byte units
382 - bb is the write threshold in 1024 byte units
383 - dd is the maximum number of scatter/gather segments
393 (look for a package mt-st* from the Linux ftp sites; the GNU mt does
431 Re-tension tape.
439 Seek to tape block count. Uses Tandberg-compatible seek (QFA)
440 for SCSI-1 drives and SCSI-2 seek for SCSI-2 drives. The file and
474 partitions (argument non-zero). If the argument is positive,
480 LTO drives from LTO-5 upwards. The drive has to support partitions
524 the MTSEEK and MTIOCPOS for SCSI-2 drives instead of
554 Defines the default block size set automatically. Value
555 0xffffff means that the default is not used any more.
559 (0xfffff) the default will not be used any more. Otherwise
563 The compression default will not be used if the value of
565 contains the new default. If the bits 8-15 are set to a
566 non-zero number, and this number is not 0xff, the number is
569 default.
572 default is 900 seconds (15 minutes). The timeout should be
577 known to take a long time. The default is 14000 seconds
586 cleaning. The bits are device-dependent. The driver is
588 bits of the argument; must be >= 18 (values 1 - 17
590 a mask to select the relevant bits (the bits 9-16), and the
591 bit pattern (bits 17-23). If the bit pattern is zero, one
593 the pattern is non-zero, the pattern must match the masked
604 Tandberg-compatible QFA for SCSI-1 drives and the SCSI-2
605 command for the SCSI-2 drives.
612 block is -1 when it can't be determined (e.g., after MTBSF).
641 The MTEOM command is by default implemented as spacing over 32767
659 Debugging code is now compiled in by default but debugging is turned off
668 the driver is waiting. With the command 'ps -l' you can see the state