2 Bacula® - The Network Backup Solution
4 Copyright (C) 2002-2009 Free Software Foundation Europe e.V.
6 The main author of Bacula is Kern Sibbald, with contributions from
7 many others, a complete list can be found in the file AUTHORS.
8 This program is Free Software; you can redistribute it and/or
9 modify it under the terms of version two of the GNU General Public
10 License as published by the Free Software Foundation and included
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 Bacula® is a registered trademark of Kern Sibbald.
24 The licensor of Bacula is the Free Software Foundation Europe
25 (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
26 Switzerland, email:ftf@fsfeurope.org.
30 * Routines for handling mounting tapes for reading and for
33 * Kern Sibbald, August MMII
38 #include "bacula.h" /* pull in global headers */
39 #include "stored.h" /* pull in Storage Deamon headers */
57 * If release is set, we rewind the current volume,
58 * which we no longer want, and ask the user (console)
59 * to mount the next volume.
61 * Continue trying until we get it, and then ensure
62 * that we can write on it.
64 * This routine returns a 0 only if it is REALLY
65 * impossible to get the requested Volume.
67 * This routine is entered with the device blocked, but not
71 bool DCR::mount_next_write_volume()
74 bool ask = false, recycle, autochanger;
79 Dmsg2(150, "Enter mount_next_volume(release=%d) dev=%s\n", dev->must_unload(),
82 init_device_wait_timers(dcr);
86 * Attempt to mount the next volume. If something non-fatal goes
87 * wrong, we come back here to re-try (new op messages, re-read
91 Dmsg1(150, "mount_next_vol retry=%d\n", retry);
92 /* Ignore retry if this is poll request */
93 if (!dev->poll && retry++ > 4) {
94 /* Last ditch effort before giving up, force operator to respond */
97 if (!dir_ask_sysop_to_mount_volume(dcr, ST_APPEND)) {
98 Jmsg(jcr, M_FATAL, 0, _("Too many errors trying to mount device %s.\n"),
100 goto no_lock_bail_out;
103 Dmsg1(150, "Continue after dir_ask_sysop_to_mount. must_load=%d\n", dev->must_load());
105 if (job_canceled(jcr)) {
106 Jmsg(jcr, M_FATAL, 0, _("Job %d canceled.\n"), jcr->JobId);
115 if (dev->must_unload()) {
116 ask = true; /* ask operator to mount tape */
117 do_find = true; /* re-find a volume after unload */
121 do_swapping(true /*is_writing*/);
122 do_load(true /*is_writing*/);
125 if (do_find && !find_a_volume()) {
126 goto no_lock_bail_out;
129 if (job_canceled(jcr)) {
132 Dmsg3(150, "After find_next_append. Vol=%s Slot=%d Parts=%d\n",
133 VolCatInfo.VolCatName, VolCatInfo.Slot, VolCatInfo.VolCatParts);
136 * Get next volume and ready it for append
137 * This code ensures that the device is ready for
138 * writing. We start from the assumption that there
139 * may not be a tape mounted.
141 * If the device is a file, we create the output
142 * file. If it is a tape, we check the volume name
143 * and move the tape to the end of data.
147 if (autoload_device(dcr, true/*writing*/, NULL) > 0) {
154 do_find = true; /* do find_a_volume if we retry */
157 Dmsg1(150, "autoload_dev returns %d\n", autochanger);
159 * If we autochanged to correct Volume or (we have not just
160 * released the Volume AND we can automount) we go ahead
161 * and read the label. If there is no tape in the drive,
162 * we will fail, recurse and ask the operator the next time.
164 if (!dev->must_unload() && dev->is_tape() && dev->has_cap(CAP_AUTOMOUNT)) {
165 Dmsg0(250, "(1)Ask=0\n");
166 ask = false; /* don't ask SYSOP this time */
168 /* Don't ask if not removable */
169 if (!dev->is_removable()) {
170 Dmsg0(250, "(2)Ask=0\n");
173 Dmsg2(250, "Ask=%d autochanger=%d\n", ask, autochanger);
177 if (!dir_ask_sysop_to_mount_volume(dcr, ST_APPEND)) {
178 Dmsg0(150, "Error return ask_sysop ...\n");
179 goto no_lock_bail_out;
183 if (job_canceled(jcr)) {
186 Dmsg3(150, "want vol=%s devvol=%s dev=%s\n", VolumeName,
187 dev->VolHdr.VolumeName, dev->print_name());
189 if (dev->poll && dev->has_cap(CAP_CLOSEONPOLL)) {
194 /* Ensure the device is open */
195 if (dev->has_cap(CAP_STREAM)) {
196 mode = OPEN_WRITE_ONLY;
198 mode = OPEN_READ_WRITE;
200 /* Try autolabel if enabled */
201 if (dev->open(dcr, mode) < 0) {
202 try_autolabel(false); /* try to create a new volume label */
204 while (dev->open(dcr, mode) < 0) {
205 Dmsg1(150, "open_device failed: ERR=%s\n", dev->bstrerror());
206 if ((dev->is_file() && dev->is_removable()) || dev->is_dvd()) {
208 Dmsg0(150, "call scan_dir_for_vol\n");
210 if (!dev->mount(0)) {
214 if (ok && dev->scan_dir_for_volume(dcr)) {
215 if (dev->open(dcr, mode) >= 0) {
216 break; /* got a valid volume */
219 if (ok && dev->is_dvd()) {
223 if (try_autolabel(false) == try_read_vol) {
224 break; /* created a new volume label */
226 Jmsg3(jcr, M_WARNING, 0, _("Open device %s Volume \"%s\" failed: ERR=%s\n"),
227 dev->print_name(), dcr->VolumeName, dev->bstrerror());
228 Dmsg0(50, "set_unload\n");
229 dev->set_unload(); /* force ask sysop */
231 Dmsg0(150, "goto mount_next_vol\n");
236 * Now check the volume label to make sure we have the right tape mounted
239 switch (check_volume_label(ask, autochanger)) {
241 Dmsg0(50, "set_unload\n");
242 dev->set_unload(); /* want a different Volume */
243 Dmsg0(150, "goto mount_next_vol\n");
254 * See if we have a fresh tape or a tape with data.
256 * Note, if the LabelType is PRE_LABEL, it was labeled
257 * but never written. If so, rewrite the label but set as
258 * VOL_LABEL. We rewind and return the label (reconstructed)
259 * in the block so that in the case of a new tape, data can
260 * be appended just after the block label. If we are writing
261 * a second volume, the calling routine will write the label
262 * before writing the overflow block.
264 * If the tape is marked as Recycle, we rewrite the label.
266 recycle = strcmp(dev->VolCatInfo.VolCatStatus, "Recycle") == 0;
267 if (dev->VolHdr.LabelType == PRE_LABEL || recycle) {
268 if (!rewrite_volume_label(dcr, recycle)) {
269 mark_volume_in_error();
274 * OK, at this point, we have a valid Bacula label, but
275 * we need to position to the end of the volume, since we are
276 * just now putting it into append mode.
278 Dmsg0(200, "Device previously written, moving to end of data\n");
279 Jmsg(jcr, M_INFO, 0, _("Volume \"%s\" previously written, moving to end of data.\n"),
282 if (!dev->eod(dcr)) {
283 Jmsg(jcr, M_ERROR, 0, _("Unable to position to end of data on device %s: ERR=%s\n"),
284 dev->print_name(), dev->bstrerror());
285 mark_volume_in_error();
288 if (!is_eod_valid()) {
289 Dmsg0(150, "goto mount_next_vol\n");
293 dev->VolCatInfo.VolCatMounts++; /* Update mounts */
294 Dmsg1(150, "update volinfo mounts=%d\n", dev->VolCatInfo.VolCatMounts);
295 if (!dir_update_volume_info(dcr, false, false)) {
299 /* Return an empty block */
300 empty_block(block); /* we used it for reading so set for write */
303 Dmsg1(150, "set APPEND, normal return from mount_next_write_volume. dev=%s\n",
317 * This routine is meant to be called once the first pass
318 * to ensure that we have a candidate volume to mount.
319 * Otherwise, we ask the sysop to created one.
320 * Note, the the Volumes are locked on entry.
321 * They are unlocked on failure and remain locked on
322 * success. The caller must know this!!!
324 bool DCR::find_a_volume()
327 if (!is_suitable_volume_mounted()) {
328 bool have_vol = false;
329 /* Do we have a candidate volume? */
331 bstrncpy(VolumeName, dev->vol->vol_name, sizeof(VolumeName));
332 have_vol = dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE);
335 * Get Director's idea of what tape we should have mounted.
339 Dmsg0(200, "Before dir_find_next_appendable_volume.\n");
340 while (!dir_find_next_appendable_volume(dcr)) {
341 Dmsg0(200, "not dir_find_next\n");
342 if (job_canceled(jcr)) {
347 if (!dir_ask_sysop_to_create_appendable_volume(dcr)) {
351 Dmsg0(150, "Again dir_find_next_append...\n");
358 int DCR::check_volume_label(bool &ask, bool &autochanger)
360 int vol_label_status;
362 * If we are writing to a stream device, ASSUME the volume label
365 if (dev->has_cap(CAP_STREAM)) {
366 vol_label_status = VOL_OK;
367 create_volume_label(dev, VolumeName, "Default", false /* not DVD */);
368 dev->VolHdr.LabelType = PRE_LABEL;
370 vol_label_status = read_dev_volume_label(this);
372 if (job_canceled(jcr)) {
376 Dmsg2(150, "Want dirVol=%s dirStat=%s\n", VolumeName,
377 VolCatInfo.VolCatStatus);
379 * At this point, dev->VolCatInfo has what is in the drive, if anything,
380 * and dcr->VolCatInfo has what the Director wants.
382 switch (vol_label_status) {
384 Dmsg1(150, "Vol OK name=%s\n", dev->VolHdr.VolumeName);
385 dev->VolCatInfo = VolCatInfo; /* structure assignment */
386 break; /* got a Volume */
388 VOLUME_CAT_INFO dcrVolCatInfo, devVolCatInfo;
389 char saveVolumeName[MAX_NAME_LENGTH];
391 Dmsg2(150, "Vol NAME Error Have=%s, want=%s\n", dev->VolHdr.VolumeName, VolumeName);
392 if (dev->is_volume_to_unload()) {
394 goto check_next_volume;
397 /* If not removable, Volume is broken */
398 if (!dev->is_removable()) {
399 Jmsg(jcr, M_WARNING, 0, _("Volume \"%s\" not on device %s.\n"),
400 VolumeName, dev->print_name());
401 mark_volume_in_error();
402 goto check_next_volume;
406 * OK, we got a different volume mounted. First save the
407 * requested Volume info (dcr) structure, then query if
408 * this volume is really OK. If not, put back the desired
409 * volume name, mark it not in changer and continue.
411 dcrVolCatInfo = VolCatInfo; /* structure assignment */
412 devVolCatInfo = dev->VolCatInfo; /* structure assignment */
413 /* Check if this is a valid Volume in the pool */
414 bstrncpy(saveVolumeName, VolumeName, sizeof(saveVolumeName));
415 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
416 if (!dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE)) {
417 POOL_MEM vol_info_msg;
418 pm_strcpy(vol_info_msg, jcr->dir_bsock->msg); /* save error message */
419 /* Restore desired volume name, note device info out of sync */
420 /* This gets the info regardless of the Pool */
421 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
422 if (autochanger && !dir_get_volume_info(this, GET_VOL_INFO_FOR_READ)) {
424 * If we get here, we know we cannot write on the Volume,
425 * and we know that we cannot read it either, so it
426 * is not in the autochanger.
428 mark_volume_not_inchanger();
430 dev->VolCatInfo = devVolCatInfo; /* structure assignment */
431 dev->set_unload(); /* unload this volume */
432 Jmsg(jcr, M_WARNING, 0, _("Director wanted Volume \"%s\".\n"
433 " Current Volume \"%s\" not acceptable because:\n"
435 dcrVolCatInfo.VolCatName, dev->VolHdr.VolumeName,
436 vol_info_msg.c_str());
438 /* Restore saved DCR before continuing */
439 bstrncpy(VolumeName, saveVolumeName, sizeof(VolumeName));
440 VolCatInfo = dcrVolCatInfo; /* structure assignment */
441 goto check_next_volume;
444 * This was not the volume we expected, but it is OK with
445 * the Director, so use it.
447 Dmsg1(150, "Got new Volume name=%s\n", VolumeName);
448 dev->VolCatInfo = VolCatInfo; /* structure assignment */
449 Dmsg1(100, "Call reserve_volume=%s\n", dev->VolHdr.VolumeName);
450 if (reserve_volume(this, dev->VolHdr.VolumeName) == NULL) {
451 Jmsg2(jcr, M_WARNING, 0, _("Could not reserve volume %s on %s\n"),
452 dev->VolHdr.VolumeName, dev->print_name());
454 goto check_next_volume;
456 break; /* got a Volume */
458 * At this point, we assume we have a blank tape mounted.
462 Jmsg(jcr, M_FATAL, 0, "%s", jcr->errmsg);
463 mark_volume_in_error();
464 goto check_bail_out; /* we could not write on DVD */
466 /* Fall through wanted */
468 switch (try_autolabel(true)) {
470 goto check_next_volume;
472 goto check_read_volume;
478 /* NOTE! Fall-through wanted. */
481 Dmsg0(200, "VOL_NO_MEDIA or default.\n");
482 /* Send error message */
485 Dmsg1(200, "Msg suppressed by poll: %s\n", jcr->errmsg);
488 /* Needed, so the medium can be changed */
489 if (dev->requires_mount()) {
493 goto check_next_volume;
498 return check_next_vol;
504 return check_read_vol;
509 bool DCR::is_suitable_volume_mounted()
511 /* Volume mounted? */
512 if (dev->VolHdr.VolumeName[0] == 0 || dev->swap_dev || dev->must_unload()) {
513 return false; /* no */
515 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
516 return dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE);
519 bool DCR::do_unload()
521 if (dev->must_unload()) {
522 Dmsg1(100, "must_unload release %s\n", dev->print_name());
528 bool DCR::do_load(bool is_writing)
530 if (dev->must_load()) {
531 Dmsg1(100, "Must load %s\n", dev->print_name());
532 if (autoload_device(this, is_writing, NULL) > 0) {
541 void DCR::do_swapping(bool is_writing)
544 * See if we are asked to swap the Volume from another device
545 * if so, unload the other device here, and attach the
546 * volume to our drive.
549 if (dev->swap_dev->must_unload()) {
551 dev->swap_dev->set_slot(dev->vol->get_slot());
553 Dmsg2(100, "Swap unloading slot=%d %s\n", dev->swap_dev->get_slot(),
554 dev->swap_dev->print_name());
555 unload_dev(this, dev->swap_dev);
558 dev->vol->clear_swapping();
559 Dmsg1(100, "=== set in_use vol=%s\n", dev->vol->vol_name);
560 dev->vol->set_in_use();
561 dev->VolHdr.VolumeName[0] = 0; /* don't yet have right Volume */
563 Dmsg1(100, "No vol on dev=%s\n", dev->print_name());
565 if (dev->swap_dev->vol) {
566 Dmsg2(100, "Vol=%s on dev=%s\n", dev->swap_dev->vol->vol_name,
567 dev->swap_dev->print_name());
569 dev->swap_dev = NULL;
575 * Check if the current position on the volume corresponds to
576 * what is in the catalog.
578 bool DCR::is_eod_valid()
581 char ed1[50], ed2[50];
582 if (dev->VolCatInfo.VolCatBytes == dev->part_start + dev->part_size) {
583 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\""
584 " part=%d size=%s\n"), VolumeName,
585 dev->part, edit_uint64(dev->VolCatInfo.VolCatBytes,ed1));
587 Jmsg(jcr, M_ERROR, 0, _("Bacula cannot write on DVD Volume \"%s\" because: "
588 "The sizes do not match! Volume=%s Catalog=%s\n"),
590 edit_uint64(dev->part_start + dev->part_size, ed1),
591 edit_uint64(dev->VolCatInfo.VolCatBytes, ed2));
592 mark_volume_in_error();
595 } else if (dev->is_tape()) {
597 * Check if we are positioned on the tape at the same place
598 * that the database says we should be.
600 if (dev->VolCatInfo.VolCatFiles == dev->get_file()) {
601 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\" at file=%d.\n"),
602 VolumeName, dev->get_file());
604 Jmsg(jcr, M_ERROR, 0, _("Bacula cannot write on tape Volume \"%s\" because:\n"
605 "The number of files mismatch! Volume=%u Catalog=%u\n"),
606 VolumeName, dev->get_file(), dev->VolCatInfo.VolCatFiles);
607 mark_volume_in_error();
610 } else if (dev->is_file()) {
611 char ed1[50], ed2[50];
613 pos = dev->lseek(this, (boffset_t)0, SEEK_END);
614 if (dev->VolCatInfo.VolCatBytes == (uint64_t)pos) {
615 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\""
616 " size=%s\n"), VolumeName,
617 edit_uint64(dev->VolCatInfo.VolCatBytes, ed1));
619 Jmsg(jcr, M_ERROR, 0, _("Bacula cannot write on disk Volume \"%s\" because: "
620 "The sizes do not match! Volume=%s Catalog=%s\n"),
622 edit_uint64(pos, ed1),
623 edit_uint64(dev->VolCatInfo.VolCatBytes, ed2));
624 mark_volume_in_error();
633 * If permitted, we label the device, make sure we can do
634 * it by checking that the VolCatBytes is zero => not labeled,
635 * once the Volume is labeled we don't want to label another
636 * blank tape with the same name. For disk, we go ahead and
637 * label it anyway, because the OS insures that there is only
638 * one Volume with that name.
639 * As noted above, at this point dcr->VolCatInfo has what
640 * the Director wants and dev->VolCatInfo has info on the
641 * previous tape (or nothing).
644 * try_next_vol label failed, look for another volume
645 * try_read_vol labeled volume, now re-read the label
646 * try_error hard error (catalog update)
647 * try_default I couldn't do anything
649 int DCR::try_autolabel(bool opened)
653 if (dev->poll && !dev->is_tape()) {
654 return try_default; /* if polling, don't try to create new labels */
656 /* For a tape require it to be opened and read before labeling */
657 if (!opened && dev->is_tape()) {
660 if (dev->has_cap(CAP_LABEL) && (VolCatInfo.VolCatBytes == 0 ||
661 (!dev->is_tape() && strcmp(VolCatInfo.VolCatStatus,
663 Dmsg0(150, "Create volume label\n");
664 /* Create a new Volume label and write it to the device */
665 if (!write_new_volume_label_to_dev(dcr, VolumeName,
666 pool_name, false, /* no relabel */ false /* defer DVD label */)) {
667 Dmsg2(150, "write_vol_label failed. vol=%s, pool=%s\n",
668 VolumeName, pool_name);
670 mark_volume_in_error();
674 Dmsg0(150, "dir_update_vol_info. Set Append\n");
675 /* Copy Director's info into the device info */
676 dev->VolCatInfo = VolCatInfo; /* structure assignment */
677 if (!dir_update_volume_info(dcr, true, true)) { /* indicate tape labeled */
680 Jmsg(dcr->jcr, M_INFO, 0, _("Labeled new Volume \"%s\" on device %s.\n"),
681 VolumeName, dev->print_name());
682 return try_read_vol; /* read label we just wrote */
684 if (!dev->has_cap(CAP_LABEL) && VolCatInfo.VolCatBytes == 0) {
685 Jmsg(jcr, M_WARNING, 0, _("Device %s not configured to autolabel Volumes.\n"),
688 /* If not removable, Volume is broken */
689 if (!dev->is_removable()) {
690 Jmsg(jcr, M_WARNING, 0, _("Volume \"%s\" not on device %s.\n"),
691 VolumeName, dev->print_name());
692 mark_volume_in_error();
700 * Mark volume in error in catalog
702 void DCR::mark_volume_in_error()
704 Jmsg(jcr, M_INFO, 0, _("Marking Volume \"%s\" in Error in Catalog.\n"),
706 dev->VolCatInfo = VolCatInfo; /* structure assignment */
707 bstrncpy(dev->VolCatInfo.VolCatStatus, "Error", sizeof(dev->VolCatInfo.VolCatStatus));
708 Dmsg0(150, "dir_update_vol_info. Set Error.\n");
709 dir_update_volume_info(this, false, false);
711 Dmsg0(50, "set_unload\n");
712 dev->set_unload(); /* must get a new volume */
716 * The Volume is not in the correct slot, so mark this
717 * Volume as not being in the Changer.
719 void DCR::mark_volume_not_inchanger()
721 Jmsg(jcr, M_ERROR, 0, _("Autochanger Volume \"%s\" not found in slot %d.\n"
722 " Setting InChanger to zero in catalog.\n"),
723 VolCatInfo.VolCatName, VolCatInfo.Slot);
724 dev->VolCatInfo = VolCatInfo; /* structure assignment */
725 VolCatInfo.InChanger = false;
726 dev->VolCatInfo.InChanger = false;
727 Dmsg0(400, "update vol info in mount\n");
728 dir_update_volume_info(this, true, false); /* set new status */
732 * Either because we are going to hang a new volume, or because
733 * of explicit user request, we release the current volume.
735 void DCR::release_volume()
737 unload_autochanger(this, -1);
740 Jmsg0(jcr, M_ERROR, 0, _("Hey!!!!! WroteVol non-zero !!!!!\n"));
741 Pmsg0(190, "Hey!!!!! WroteVol non-zero !!!!!\n");
744 * First erase all memory of the current volume
747 dev->block_num = dev->file = 0;
748 dev->EndBlock = dev->EndFile = 0;
749 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
751 /* Force re-read of label */
752 dev->clear_labeled();
755 dev->label_type = B_BACULA_LABEL;
758 if (dev->is_open() && (!dev->is_tape() || !dev->has_cap(CAP_ALWAYSOPEN))) {
762 /* If we have not closed the device, then at least rewind the tape */
763 if (dev->is_open()) {
764 dev->offline_or_rewind();
766 // Dmsg0(50, "set_unload\n");
767 // dev->set_unload();
768 Dmsg0(190, "release_volume\n");
774 * Check to see if the tape position as defined by the OS is
775 * the same as our concept. If it is not,
776 * it means the user has probably manually rewound the tape.
777 * Note, we check only if num_writers == 0, but this code will
778 * also work fine for any number of writers. If num_writers > 0,
779 * we probably should cancel all jobs using this device, or
780 * perhaps even abort the SD, or at a minimum, mark the tape
781 * in error. Another strategy with num_writers == 0, would be
782 * to rewind the tape and do a new eod() request.
784 bool DCR::is_tape_position_ok()
786 if (dev->is_tape() && dev->num_writers == 0) {
787 int32_t file = dev->get_os_tape_file();
788 if (file >= 0 && file != (int32_t)dev->get_file()) {
789 Jmsg(jcr, M_ERROR, 0, _("Invalid tape position on volume \"%s\""
790 " on device %s. Expected %d, got %d\n"),
791 dev->VolHdr.VolumeName, dev->print_name(), dev->get_file(), file);
793 * If the current file is greater than zero, it means we probably
794 * have some bad count of EOF marks, so mark tape in error. Otherwise
795 * the operator might have moved the tape, so we just release it
799 mark_volume_in_error();
810 * If we are reading, we come here at the end of the tape
811 * and see if there are more volumes to be mounted.
813 bool mount_next_read_volume(DCR *dcr)
815 DEVICE *dev = dcr->dev;
817 Dmsg2(90, "NumReadVolumes=%d CurReadVolume=%d\n", jcr->NumReadVolumes, jcr->CurReadVolume);
819 volume_unused(dcr); /* release current volume */
821 * End Of Tape -- mount next Volume (if another specified)
823 if (jcr->NumReadVolumes > 1 && jcr->CurReadVolume < jcr->NumReadVolumes) {
825 if (!acquire_device_for_read(dcr)) {
826 Jmsg2(jcr, M_FATAL, 0, _("Cannot open Dev=%s, Vol=%s\n"), dev->print_name(),
830 return true; /* next volume mounted */
832 Dmsg0(90, "End of Device reached.\n");