1 '\" te 2 .\" Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved. 3 .\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License. 4 .\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License. 5 .\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner] 6 .TH MT 1 "Jun 21, 2007" 7 .SH NAME 8 mt \- magnetic tape control 9 .SH SYNOPSIS 10 .LP 11 .nf 12 \fBmt\fR [\fB-f\fR \fItapename\fR] \fIcommand\fR... [\fIcount\fR] 13 .fi 14 15 .SH DESCRIPTION 16 .sp 17 .LP 18 The \fBmt\fR utility sends commands to a magnetic tape drive. If \fB-f\fR 19 \fItapename\fR is not specified, the environment variable \fBTAPE\fR is used. 20 If \fBTAPE\fR does not exist, \fBmt\fR uses the device \fB/dev/rmt/0n\fR. 21 .SH OPTIONS 22 .sp 23 .LP 24 The following options are supported: 25 .sp 26 .ne 2 27 .na 28 \fB\fB-f\fR \fItapename\fR\fR 29 .ad 30 .RS 15n 31 Specifies the raw tape device. 32 .RE 33 34 .SH OPERANDS 35 .sp 36 .LP 37 The following operands are supported: 38 .sp 39 .ne 2 40 .na 41 \fB\fIcount\fR\fR 42 .ad 43 .RS 11n 44 The number of times that the requested operation is to be performed. By 45 default, \fBmt\fR performs \fIcommand\fR once. Multiple operations of 46 \fIcommand\fR can be performed by specifying \fIcount\fR. 47 .RE 48 49 .sp 50 .ne 2 51 .na 52 \fB\fIcommand\fR\fR 53 .ad 54 .RS 11n 55 The following available commands that can be sent to a magnetic tape drive are 56 supported. Only as many characters as are required to uniquely identify a 57 \fIcommand\fR need be specified. 58 .sp 59 .ne 2 60 .na 61 \fB\fBasf\fR\fR 62 .ad 63 .RS 10n 64 Specifies absolute space to \fIcount\fR file number. This is equivalent to a 65 \fBrewind\fR followed by a \fBfsf\fR \fIcount\fR. 66 .RE 67 68 .sp 69 .ne 2 70 .na 71 \fB\fBbsf\fR\fR 72 .ad 73 .RS 10n 74 Back spaces over \fIcount\fR EOF marks. The tape is positioned on the 75 beginning-of-tape side of the EOF mark. 76 .RE 77 78 .sp 79 .ne 2 80 .na 81 \fB\fBbsr\fR\fR 82 .ad 83 .RS 10n 84 Back spaces \fIcount\fR records. 85 .RE 86 87 .sp 88 .ne 2 89 .na 90 \fB\fBbssf\fR\fR 91 .ad 92 .RS 10n 93 Back spaces over the requested number of sequential file marks. Sequential file 94 marks are where the file marks are one right after the other with no other 95 blocks of any kind between the file marks. The number argument specifies how 96 many sequential file marks to which to space. For example, \fBbssf 4\fR 97 searches backwards to the first place where there are 4 sequential file marks 98 and positions to the BOP side of the 4th file mark. 99 .sp 100 This command is not supported by all drives. 101 .RE 102 103 .sp 104 .ne 2 105 .na 106 \fB\fBeof\fR\fR 107 .ad 108 .br 109 .na 110 \fB\fBweof\fR\fR 111 .ad 112 .RS 10n 113 Writes \fIcount\fR EOF marks at the current position on the tape. 114 .RE 115 116 .sp 117 .ne 2 118 .na 119 \fB\fBfsf\fR\fR 120 .ad 121 .RS 10n 122 Forward spaces over \fIcount\fR EOF marks. The tape is positioned on the first 123 block of the file. 124 .RE 125 126 .sp 127 .ne 2 128 .na 129 \fB\fBfsr\fR\fR 130 .ad 131 .RS 10n 132 Forward spaces \fIcount\fR records. 133 .RE 134 135 .sp 136 .ne 2 137 .na 138 \fB\fBfssf\fR\fR 139 .ad 140 .RS 10n 141 Forward spaces the over requested number of sequential file marks. Sequential 142 file marks are where the file marks are one right after the other with no other 143 blocks of any kind between the file marks. The number argument specifies how 144 many sequential file marks to which to space. For example, \fBfssf 4\fR 145 searches forwards to the first place where there are 4 sequential file marks 146 and positions after the 4th file mark. 147 .sp 148 This command is not supported by all drives. 149 .RE 150 151 .sp 152 .ne 2 153 .na 154 \fB\fBload\fR\fR 155 .ad 156 .RS 10n 157 Requests drive load and thread current media. Not supported by all drives. 158 .RE 159 160 .sp 161 .ne 2 162 .na 163 \fB\fBlock\fR\fR 164 .ad 165 .RS 10n 166 Prevents media removal. 167 .RE 168 169 .sp 170 .ne 2 171 .na 172 \fB\fBnbsf\fR\fR 173 .ad 174 .RS 10n 175 Back spaces \fIcount\fR files. The tape is positioned on the first block of the 176 file. This is equivalent to \fIcount+1\fR \fBbsf\fRs ollowed by one \fBfsf\fR. 177 .RE 178 179 .sp 180 .ne 2 181 .na 182 \fB\fBseek\fR\fR 183 .ad 184 .RS 10n 185 Positions to requested logical tape position. 186 .RE 187 188 .sp 189 .ne 2 190 .na 191 \fB\fBtell\fR\fR 192 .ad 193 .RS 10n 194 Gets and prints current logical tape position. 195 .RE 196 197 .sp 198 .ne 2 199 .na 200 \fB\fBunlock\fR\fR 201 .ad 202 .RS 10n 203 Allows media removal. 204 .RE 205 206 If \fIcount\fR is specified with any of the following commands, the \fIcount\fR 207 is ignored and the command is performed only once. 208 .sp 209 .ne 2 210 .na 211 \fB\fBconfig\fR\fR 212 .ad 213 .RS 16n 214 Reads the drives current configuration from the driver and displays it in 215 \fBst.conf\fR format. See \fBst\fR(7D) for definition of fields and there 216 meanings. 217 .RE 218 219 .sp 220 .ne 2 221 .na 222 \fB\fBeom\fR\fR 223 .ad 224 .RS 16n 225 Spaces to the end of recorded media on the tape. This is useful for appending 226 files onto previously written tapes. 227 .RE 228 229 .sp 230 .ne 2 231 .na 232 \fB\fBerase\fR\fR 233 .ad 234 .RS 16n 235 Erases the entire tape. 236 .sp 237 Some tape drives have option settings where only portions of the tape can be 238 erased. Be sure to select the correct setting to erase the whole tape. Erasing 239 a tape can take a long time depending on the device and/or tape. Refer to the 240 device specific manual for time details. 241 .RE 242 243 .sp 244 .ne 2 245 .na 246 \fB\fBforcereserve\fR\fR 247 .ad 248 .RS 16n 249 Attempts to break a SCSI II reserve issued by another initiator. When this 250 command completes, the drive is not reserved for the current initiator, but is 251 available for use. This command can be only be executed by those with 252 super-user privileges. 253 .RE 254 255 .sp 256 .ne 2 257 .na 258 \fB\fBoffline\fR\fR 259 .ad 260 .br 261 .na 262 \fB\fBrewoffl\fR\fR 263 .ad 264 .RS 16n 265 Rewinds the tape and, if appropriate, takes the drive unit off-line by 266 unloading the tape. 267 .RE 268 269 .sp 270 .ne 2 271 .na 272 \fB\fBrelease\fR\fR 273 .ad 274 .RS 16n 275 Re-establishes the default behavior of releasing at close. 276 .RE 277 278 .sp 279 .ne 2 280 .na 281 \fB\fBreserve\fR\fR 282 .ad 283 .RS 16n 284 Allows the tape drive to remain reserved after closing the device. The drive 285 must then be explicitly released. 286 .RE 287 288 .sp 289 .ne 2 290 .na 291 \fB\fBretension\fR\fR 292 .ad 293 .RS 16n 294 Rewinds the cartridge tape completely, then winds it forward to the end of the 295 reel and back to beginning-of-tape to smooth out tape tension. 296 .RE 297 298 .sp 299 .ne 2 300 .na 301 \fB\fBrewind\fR\fR 302 .ad 303 .RS 16n 304 Rewinds the tape. 305 .RE 306 307 .sp 308 .ne 2 309 .na 310 \fB\fBstatus\fR\fR 311 .ad 312 .RS 16n 313 Prints status information about the tape unit. 314 .sp 315 Status information can include the sense key reported by the drive, the 316 residual and retries for the last operation, the current tape position reported 317 in file number, and the number of blocks from the beginning of that file. It 318 might also report that WORM media is loaded in that drive. 319 .RE 320 321 .RE 322 323 .SH EXIT STATUS 324 .sp 325 .ne 2 326 .na 327 \fB\fB0\fR\fR 328 .ad 329 .RS 5n 330 All operations were successful. 331 .RE 332 333 .sp 334 .ne 2 335 .na 336 \fB\fB1\fR\fR 337 .ad 338 .RS 5n 339 Command was unrecognized or \fBmt\fR was unable to open the specified tape 340 drive. 341 .RE 342 343 .sp 344 .ne 2 345 .na 346 \fB\fB2\fR\fR 347 .ad 348 .RS 5n 349 An operation failed. 350 .RE 351 352 .SH FILES 353 .sp 354 .ne 2 355 .na 356 \fB\fB/dev/rmt/*\fR\fR 357 .ad 358 .RS 14n 359 magnetic tape interface 360 .RE 361 362 .SH SEE ALSO 363 .sp 364 .LP 365 \fBtar\fR(1), \fBtcopy\fR(1), \fBar.h\fR(3HEAD), \fBattributes\fR(5), 366 \fBmtio\fR(7I), \fBst\fR(7D) 367 .SH BUGS 368 .sp 369 .LP 370 Not all devices support all options. Some options are hardware-dependent. Refer 371 to the corresponding device manual page. 372 .sp 373 .LP 374 \fBmt\fR is architecture sensitive. Heterogeneous operation (that is, SPARC to 375 x86 or the reverse) is not supported.