Lines Matching +full:sub +full:- +full:block

65 .Bl -enum
68 referred to as sub-mode 00 below.
84 .Sh SUB-MODES
86 .Sq sub-modes .
87 The sub-modes differ in the action taken when the device is closed:
88 .Bl -tag -width XXXX
112 block-size modes.
114 .Tn QIC Ns -type
115 devices run in fixed block-size mode, where most nine-track tapes and
116 many new cartridge formats allow variable block-size.
118 .Bl -inset
119 .It Variable block-size:
124 of a record from tape (though you may request a larger block and read
127 The block size used
133 When reading a variable record/block from the tape, the head is
138 process to read will immediately hit the file mark and receive an end-of-file notification.
139 .It Fixed block-size:
148 and vice-versa.
158 process to read if in no-rewind mode.)
160 .Sh BLOCK SIZES
165 are respected in terms of the block size written to tape.
166 For example, if the user tries to write a 256KB block to the tape, but the
175 The problem with that behavior, though, is that it hides the actual on-tape
176 block size from the application writer, at least in variable block mode.
183 .Bl -tag -width 12
199 variables available to view block handling parameters:
200 .Bl -tag -width 12
216 READ BLOCK LIMITS command.
240 block devices.
248 .Dq mt param -l
252 .Dq mt param -s
263 .Bl -tag -width 5n
269 application reads a block that is not the same length as the amount of data
272 See the SSC-5 spec (available at t10.org), specifically the section on the
292 This is a read-only parameter, and is set to 1 if the tape drive supports
297 As of SSC-5r03 (available at t10.org), the protection method values are:
298 .Bl -tag -width 3n
302 Reed-Solomon CRC, 4 bytes in length.
309 If set to 1, enable logical block protection on writes.
310 The CRC must be appended to the end of the block written to the tape driver.
311 The tape drive will verify the CRC when it receives the block.
313 If set to 1, enable logical block protection on reads.
314 The CRC will be appended to the end of the block read from the tape driver.
315 The application should verify the CRC when it receives the block.
317 If set to 1, enable logical block protection on the RECOVER BUFFERED DATA
330 For newer tape drives that claim to support the SPC-4
366 To set timeouts after boot, the per-instance timeout values, for example:
370 If a tape drive arrives after boot, the global tunables or per-instance
375 .Bl -tag -compact
397 .Bl -tag -compact
424 .Bl -tag -width /dev/[n][e]sa[0-9] -compact
425 .It Pa /dev/[n][e]sa[0-9]
463 .An -nosplit
488 .Tn SCSI-1
496 explicitly set variable block mode or set to the blocksize that works best