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.
68 bool DCR::mount_next_write_volume()
71 bool ask = false, recycle, autochanger;
76 Dmsg2(150, "Enter mount_next_volume(release=%d) dev=%s\n", dev->must_unload(),
79 init_device_wait_timers(dcr);
83 * Attempt to mount the next volume. If something non-fatal goes
84 * wrong, we come back here to re-try (new op messages, re-read
88 Dmsg1(150, "mount_next_vol retry=%d\n", retry);
89 /* Ignore retry if this is poll request */
90 if (!dev->poll && retry++ > 4) {
91 /* Last ditch effort before giving up, force operator to respond */
94 if (!dir_ask_sysop_to_mount_volume(dcr, ST_APPEND)) {
95 Jmsg(jcr, M_FATAL, 0, _("Too many errors trying to mount device %s.\n"),
97 goto no_lock_bail_out;
100 Dmsg1(150, "Continue after dir_ask_sysop_to_mount. must_load=%d\n", dev->must_load());
102 if (job_canceled(jcr)) {
103 Jmsg(jcr, M_FATAL, 0, _("Job %d canceled.\n"), jcr->JobId);
112 if (dev->must_unload()) {
113 ask = true; /* ask operator to mount tape */
114 do_find = true; /* re-find a volume after unload */
117 do_swapping(true /*is_writing*/);
118 do_load(true /*is_writing*/);
120 if (do_find && !find_a_volume()) {
121 goto no_lock_bail_out;
124 if (job_canceled(jcr)) {
127 Dmsg3(150, "After find_next_append. Vol=%s Slot=%d Parts=%d\n",
128 VolCatInfo.VolCatName, VolCatInfo.Slot, VolCatInfo.VolCatParts);
131 * Get next volume and ready it for append
132 * This code ensures that the device is ready for
133 * writing. We start from the assumption that there
134 * may not be a tape mounted.
136 * If the device is a file, we create the output
137 * file. If it is a tape, we check the volume name
138 * and move the tape to the end of data.
141 if (autoload_device(dcr, true/*writing*/, NULL) > 0) {
148 do_find = true; /* do find_a_volume if we retry */
150 Dmsg1(150, "autoload_dev returns %d\n", autochanger);
152 * If we autochanged to correct Volume or (we have not just
153 * released the Volume AND we can automount) we go ahead
154 * and read the label. If there is no tape in the drive,
155 * we will fail, recurse and ask the operator the next time.
157 if (!dev->must_unload() && dev->is_tape() && dev->has_cap(CAP_AUTOMOUNT)) {
158 Dmsg0(250, "(1)Ask=0\n");
159 ask = false; /* don't ask SYSOP this time */
161 /* Don't ask if not removable */
162 if (!dev->is_removable()) {
163 Dmsg0(250, "(2)Ask=0\n");
166 Dmsg2(250, "Ask=%d autochanger=%d\n", ask, autochanger);
170 if (!dir_ask_sysop_to_mount_volume(dcr, ST_APPEND)) {
171 Dmsg0(150, "Error return ask_sysop ...\n");
172 goto no_lock_bail_out;
176 if (job_canceled(jcr)) {
179 Dmsg3(150, "want vol=%s devvol=%s dev=%s\n", VolumeName,
180 dev->VolHdr.VolumeName, dev->print_name());
182 if (dev->poll && dev->has_cap(CAP_CLOSEONPOLL)) {
187 /* Ensure the device is open */
188 if (dev->has_cap(CAP_STREAM)) {
189 mode = OPEN_WRITE_ONLY;
191 mode = OPEN_READ_WRITE;
193 /* Try autolabel if enabled */
194 if (dev->open(dcr, mode) < 0) {
195 try_autolabel(false); /* try to create a new volume label */
197 while (dev->open(dcr, mode) < 0) {
198 Dmsg1(150, "open_device failed: ERR=%s\n", dev->bstrerror());
199 if ((dev->is_file() && dev->is_removable()) || dev->is_dvd()) {
201 Dmsg0(150, "call scan_dir_for_vol\n");
203 if (!dev->mount(0)) {
207 if (ok && dev->scan_dir_for_volume(dcr)) {
208 if (dev->open(dcr, mode) >= 0) {
209 break; /* got a valid volume */
212 if (ok && dev->is_dvd()) {
216 if (try_autolabel(false) == try_read_vol) {
217 break; /* created a new volume label */
219 Jmsg3(jcr, M_WARNING, 0, _("Open device %s Volume \"%s\" failed: ERR=%s\n"),
220 dev->print_name(), dcr->VolumeName, dev->bstrerror());
221 Dmsg0(50, "set_unload\n");
222 dev->set_unload(); /* force ask sysop */
224 Dmsg0(150, "goto mount_next_vol\n");
229 * Now check the volume label to make sure we have the right tape mounted
232 switch (check_volume_label(ask, autochanger)) {
234 Dmsg0(50, "set_unload\n");
235 dev->set_unload(); /* want a different Volume */
236 Dmsg0(150, "goto mount_next_vol\n");
247 * See if we have a fresh tape or a tape with data.
249 * Note, if the LabelType is PRE_LABEL, it was labeled
250 * but never written. If so, rewrite the label but set as
251 * VOL_LABEL. We rewind and return the label (reconstructed)
252 * in the block so that in the case of a new tape, data can
253 * be appended just after the block label. If we are writing
254 * a second volume, the calling routine will write the label
255 * before writing the overflow block.
257 * If the tape is marked as Recycle, we rewrite the label.
259 recycle = strcmp(dev->VolCatInfo.VolCatStatus, "Recycle") == 0;
260 if (dev->VolHdr.LabelType == PRE_LABEL || recycle) {
261 if (!rewrite_volume_label(dcr, recycle)) {
262 mark_volume_in_error();
267 * OK, at this point, we have a valid Bacula label, but
268 * we need to position to the end of the volume, since we are
269 * just now putting it into append mode.
271 Dmsg0(200, "Device previously written, moving to end of data\n");
272 Jmsg(jcr, M_INFO, 0, _("Volume \"%s\" previously written, moving to end of data.\n"),
275 if (!dev->eod(dcr)) {
276 Jmsg(jcr, M_ERROR, 0, _("Unable to position to end of data on device %s: ERR=%s\n"),
277 dev->print_name(), dev->bstrerror());
278 mark_volume_in_error();
281 if (!is_eod_valid()) {
282 Dmsg0(150, "goto mount_next_vol\n");
286 dev->VolCatInfo.VolCatMounts++; /* Update mounts */
287 Dmsg1(150, "update volinfo mounts=%d\n", dev->VolCatInfo.VolCatMounts);
288 if (!dir_update_volume_info(dcr, false, false)) {
292 /* Return an empty block */
293 empty_block(block); /* we used it for reading so set for write */
296 Dmsg1(150, "set APPEND, normal return from mount_next_write_volume. dev=%s\n",
310 * This routine is meant to be called once the first pass
311 * to ensure that we have a candidate volume to mount.
312 * Otherwise, we ask the sysop to created one.
314 bool DCR::find_a_volume()
317 if (!is_suitable_volume_mounted()) {
318 bool have_vol = false;
319 /* Do we have a candidate volume? */
321 bstrncpy(VolumeName, dev->vol->vol_name, sizeof(VolumeName));
322 have_vol = dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE);
325 * Get Director's idea of what tape we should have mounted.
329 Dmsg0(200, "Before dir_find_next_appendable_volume.\n");
330 while (!dir_find_next_appendable_volume(dcr)) {
331 Dmsg0(200, "not dir_find_next\n");
332 if (job_canceled(jcr)) {
337 if (!dir_ask_sysop_to_create_appendable_volume(dcr)) {
341 Dmsg0(150, "Again dir_find_next_append...\n");
348 int DCR::check_volume_label(bool &ask, bool &autochanger)
350 int vol_label_status;
352 * If we are writing to a stream device, ASSUME the volume label
355 if (dev->has_cap(CAP_STREAM)) {
356 vol_label_status = VOL_OK;
357 create_volume_label(dev, VolumeName, "Default", false /* not DVD */);
358 dev->VolHdr.LabelType = PRE_LABEL;
360 vol_label_status = read_dev_volume_label(this);
362 if (job_canceled(jcr)) {
366 Dmsg2(150, "Want dirVol=%s dirStat=%s\n", VolumeName,
367 VolCatInfo.VolCatStatus);
369 * At this point, dev->VolCatInfo has what is in the drive, if anything,
370 * and dcr->VolCatInfo has what the Director wants.
372 switch (vol_label_status) {
374 Dmsg1(150, "Vol OK name=%s\n", dev->VolHdr.VolumeName);
375 dev->VolCatInfo = VolCatInfo; /* structure assignment */
376 break; /* got a Volume */
378 VOLUME_CAT_INFO dcrVolCatInfo, devVolCatInfo;
379 char saveVolumeName[MAX_NAME_LENGTH];
381 Dmsg2(150, "Vol NAME Error Have=%s, want=%s\n", dev->VolHdr.VolumeName, VolumeName);
382 if (dev->is_volume_to_unload()) {
384 goto check_next_volume;
387 /* If not removable, Volume is broken */
388 if (!dev->is_removable()) {
389 Jmsg(jcr, M_WARNING, 0, _("Volume \"%s\" not on device %s.\n"),
390 VolumeName, dev->print_name());
391 mark_volume_in_error();
392 goto check_next_volume;
396 * OK, we got a different volume mounted. First save the
397 * requested Volume info (dcr) structure, then query if
398 * this volume is really OK. If not, put back the desired
399 * volume name, mark it not in changer and continue.
401 dcrVolCatInfo = VolCatInfo; /* structure assignment */
402 devVolCatInfo = dev->VolCatInfo; /* structure assignment */
403 /* Check if this is a valid Volume in the pool */
404 bstrncpy(saveVolumeName, VolumeName, sizeof(saveVolumeName));
405 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
406 if (!dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE)) {
407 POOL_MEM vol_info_msg;
408 pm_strcpy(vol_info_msg, jcr->dir_bsock->msg); /* save error message */
409 /* Restore desired volume name, note device info out of sync */
410 /* This gets the info regardless of the Pool */
411 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
412 if (autochanger && !dir_get_volume_info(this, GET_VOL_INFO_FOR_READ)) {
414 * If we get here, we know we cannot write on the Volume,
415 * and we know that we cannot read it either, so it
416 * is not in the autochanger.
418 mark_volume_not_inchanger();
420 dev->VolCatInfo = devVolCatInfo; /* structure assignment */
421 dev->set_unload(); /* unload this volume */
422 Jmsg(jcr, M_WARNING, 0, _("Director wanted Volume \"%s\".\n"
423 " Current Volume \"%s\" not acceptable because:\n"
425 dcrVolCatInfo.VolCatName, dev->VolHdr.VolumeName,
426 vol_info_msg.c_str());
428 /* Restore saved DCR before continuing */
429 bstrncpy(VolumeName, saveVolumeName, sizeof(VolumeName));
430 VolCatInfo = dcrVolCatInfo; /* structure assignment */
431 goto check_next_volume;
434 * This was not the volume we expected, but it is OK with
435 * the Director, so use it.
437 Dmsg1(150, "Got new Volume name=%s\n", VolumeName);
438 dev->VolCatInfo = VolCatInfo; /* structure assignment */
439 Dmsg1(100, "Call reserve_volume=%s\n", dev->VolHdr.VolumeName);
440 if (reserve_volume(this, dev->VolHdr.VolumeName) == NULL) {
441 Jmsg2(jcr, M_WARNING, 0, _("Could not reserve volume %s on %s\n"),
442 dev->VolHdr.VolumeName, dev->print_name());
444 goto check_next_volume;
446 break; /* got a Volume */
448 * At this point, we assume we have a blank tape mounted.
452 Jmsg(jcr, M_FATAL, 0, "%s", jcr->errmsg);
453 mark_volume_in_error();
454 goto check_bail_out; /* we could not write on DVD */
456 /* Fall through wanted */
458 switch (try_autolabel(true)) {
460 goto check_next_volume;
462 goto check_read_volume;
468 /* NOTE! Fall-through wanted. */
471 Dmsg0(200, "VOL_NO_MEDIA or default.\n");
472 /* Send error message */
475 Dmsg1(200, "Msg suppressed by poll: %s\n", jcr->errmsg);
478 /* Needed, so the medium can be changed */
479 if (dev->requires_mount()) {
483 goto check_next_volume;
488 return check_next_vol;
494 return check_read_vol;
499 bool DCR::is_suitable_volume_mounted()
501 /* Volume mounted? */
502 if (dev->VolHdr.VolumeName[0] == 0 || dev->swap_dev || dev->must_unload()) {
503 return false; /* no */
505 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
506 return dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE);
509 bool DCR::do_unload()
511 if (dev->must_unload()) {
512 Dmsg1(100, "must_unload release %s\n", dev->print_name());
518 bool DCR::do_load(bool is_writing)
520 if (dev->must_load()) {
521 Dmsg1(100, "Must load %s\n", dev->print_name());
522 if (autoload_device(this, is_writing, NULL) > 0) {
531 void DCR::do_swapping(bool is_writing)
534 * See if we are asked to swap the Volume from another device
535 * if so, unload the other device here, and attach the
536 * volume to our drive.
539 if (dev->swap_dev->must_unload()) {
541 dev->swap_dev->set_slot(dev->vol->get_slot());
543 Dmsg2(100, "Swap unloading slot=%d %s\n", dev->swap_dev->get_slot(),
544 dev->swap_dev->print_name());
545 unload_dev(this, dev->swap_dev);
548 dev->vol->clear_swapping();
549 Dmsg1(100, "=== set in_use vol=%s\n", dev->vol->vol_name);
550 dev->vol->set_in_use();
551 dev->VolHdr.VolumeName[0] = 0; /* don't yet have right Volume */
553 Dmsg1(100, "No vol on dev=%s\n", dev->print_name());
555 if (dev->swap_dev->vol) {
556 Dmsg2(100, "Vol=%s on dev=%s\n", dev->swap_dev->vol->vol_name,
557 dev->swap_dev->print_name());
559 dev->swap_dev = NULL;
565 * Check if the current position on the volume corresponds to
566 * what is in the catalog.
568 bool DCR::is_eod_valid()
571 char ed1[50], ed2[50];
572 if (dev->VolCatInfo.VolCatBytes == dev->part_start + dev->part_size) {
573 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\""
574 " part=%d size=%s\n"), VolumeName,
575 dev->part, edit_uint64(dev->VolCatInfo.VolCatBytes,ed1));
577 Jmsg(jcr, M_ERROR, 0, _("Bacula cannot write on DVD Volume \"%s\" because: "
578 "The sizes do not match! Volume=%s Catalog=%s\n"),
580 edit_uint64(dev->part_start + dev->part_size, ed1),
581 edit_uint64(dev->VolCatInfo.VolCatBytes, ed2));
582 mark_volume_in_error();
585 } else if (dev->is_tape()) {
587 * Check if we are positioned on the tape at the same place
588 * that the database says we should be.
590 if (dev->VolCatInfo.VolCatFiles == dev->get_file()) {
591 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\" at file=%d.\n"),
592 VolumeName, dev->get_file());
594 Jmsg(jcr, M_ERROR, 0, _("Bacula cannot write on tape Volume \"%s\" because:\n"
595 "The number of files mismatch! Volume=%u Catalog=%u\n"),
596 VolumeName, dev->get_file(), dev->VolCatInfo.VolCatFiles);
597 mark_volume_in_error();
600 } else if (dev->is_file()) {
601 char ed1[50], ed2[50];
603 pos = dev->lseek(this, (boffset_t)0, SEEK_END);
604 if (dev->VolCatInfo.VolCatBytes == (uint64_t)pos) {
605 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\""
606 " size=%s\n"), VolumeName,
607 edit_uint64(dev->VolCatInfo.VolCatBytes, ed1));
609 Jmsg(jcr, M_ERROR, 0, _("Bacula cannot write on disk Volume \"%s\" because: "
610 "The sizes do not match! Volume=%s Catalog=%s\n"),
612 edit_uint64(pos, ed1),
613 edit_uint64(dev->VolCatInfo.VolCatBytes, ed2));
614 mark_volume_in_error();
623 * If permitted, we label the device, make sure we can do
624 * it by checking that the VolCatBytes is zero => not labeled,
625 * once the Volume is labeled we don't want to label another
626 * blank tape with the same name. For disk, we go ahead and
627 * label it anyway, because the OS insures that there is only
628 * one Volume with that name.
629 * As noted above, at this point dcr->VolCatInfo has what
630 * the Director wants and dev->VolCatInfo has info on the
631 * previous tape (or nothing).
634 * try_next_vol label failed, look for another volume
635 * try_read_vol labeled volume, now re-read the label
636 * try_error hard error (catalog update)
637 * try_default I couldn't do anything
639 int DCR::try_autolabel(bool opened)
643 if (dev->poll && !dev->is_tape()) {
644 return try_default; /* if polling, don't try to create new labels */
646 /* For a tape require it to be opened and read before labeling */
647 if (!opened && dev->is_tape()) {
650 if (dev->has_cap(CAP_LABEL) && (VolCatInfo.VolCatBytes == 0 ||
651 (!dev->is_tape() && strcmp(VolCatInfo.VolCatStatus,
653 Dmsg0(150, "Create volume label\n");
654 /* Create a new Volume label and write it to the device */
655 if (!write_new_volume_label_to_dev(dcr, VolumeName,
656 pool_name, false, /* no relabel */ false /* defer DVD label */)) {
657 Dmsg2(150, "write_vol_label failed. vol=%s, pool=%s\n",
658 VolumeName, pool_name);
660 mark_volume_in_error();
664 Dmsg0(150, "dir_update_vol_info. Set Append\n");
665 /* Copy Director's info into the device info */
666 dev->VolCatInfo = VolCatInfo; /* structure assignment */
667 if (!dir_update_volume_info(dcr, true, true)) { /* indicate tape labeled */
670 Jmsg(dcr->jcr, M_INFO, 0, _("Labeled new Volume \"%s\" on device %s.\n"),
671 VolumeName, dev->print_name());
672 return try_read_vol; /* read label we just wrote */
674 if (!dev->has_cap(CAP_LABEL) && VolCatInfo.VolCatBytes == 0) {
675 Jmsg(jcr, M_WARNING, 0, _("Device %s not configured to autolabel Volumes.\n"),
678 /* If not removable, Volume is broken */
679 if (!dev->is_removable()) {
680 Jmsg(jcr, M_WARNING, 0, _("Volume \"%s\" not on device %s.\n"),
681 VolumeName, dev->print_name());
682 mark_volume_in_error();
690 * Mark volume in error in catalog
692 void DCR::mark_volume_in_error()
694 Jmsg(jcr, M_INFO, 0, _("Marking Volume \"%s\" in Error in Catalog.\n"),
696 dev->VolCatInfo = VolCatInfo; /* structure assignment */
697 bstrncpy(dev->VolCatInfo.VolCatStatus, "Error", sizeof(dev->VolCatInfo.VolCatStatus));
698 Dmsg0(150, "dir_update_vol_info. Set Error.\n");
699 dir_update_volume_info(this, false, false);
701 Dmsg0(50, "set_unload\n");
702 dev->set_unload(); /* must get a new volume */
706 * The Volume is not in the correct slot, so mark this
707 * Volume as not being in the Changer.
709 void DCR::mark_volume_not_inchanger()
711 Jmsg(jcr, M_ERROR, 0, _("Autochanger Volume \"%s\" not found in slot %d.\n"
712 " Setting InChanger to zero in catalog.\n"),
713 VolCatInfo.VolCatName, VolCatInfo.Slot);
714 dev->VolCatInfo = VolCatInfo; /* structure assignment */
715 VolCatInfo.InChanger = false;
716 dev->VolCatInfo.InChanger = false;
717 Dmsg0(400, "update vol info in mount\n");
718 dir_update_volume_info(this, true, false); /* set new status */
722 * Either because we are going to hang a new volume, or because
723 * of explicit user request, we release the current volume.
725 void DCR::release_volume()
727 unload_autochanger(this, -1);
730 Jmsg0(jcr, M_ERROR, 0, _("Hey!!!!! WroteVol non-zero !!!!!\n"));
731 Pmsg0(190, "Hey!!!!! WroteVol non-zero !!!!!\n");
734 * First erase all memory of the current volume
737 dev->block_num = dev->file = 0;
738 dev->EndBlock = dev->EndFile = 0;
739 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
741 /* Force re-read of label */
742 dev->clear_labeled();
745 dev->label_type = B_BACULA_LABEL;
748 if (dev->is_open() && (!dev->is_tape() || !dev->has_cap(CAP_ALWAYSOPEN))) {
752 /* If we have not closed the device, then at least rewind the tape */
753 if (dev->is_open()) {
754 dev->offline_or_rewind();
756 // Dmsg0(50, "set_unload\n");
757 // dev->set_unload();
758 Dmsg0(190, "release_volume\n");
764 * Check to see if the tape position as defined by the OS is
765 * the same as our concept. If it is not,
766 * it means the user has probably manually rewound the tape.
767 * Note, we check only if num_writers == 0, but this code will
768 * also work fine for any number of writers. If num_writers > 0,
769 * we probably should cancel all jobs using this device, or
770 * perhaps even abort the SD, or at a minimum, mark the tape
771 * in error. Another strategy with num_writers == 0, would be
772 * to rewind the tape and do a new eod() request.
774 bool DCR::is_tape_position_ok()
776 if (dev->is_tape() && dev->num_writers == 0) {
777 int32_t file = dev->get_os_tape_file();
778 if (file >= 0 && file != (int32_t)dev->get_file()) {
779 Jmsg(jcr, M_ERROR, 0, _("Invalid tape position on volume \"%s\""
780 " on device %s. Expected %d, got %d\n"),
781 dev->VolHdr.VolumeName, dev->print_name(), dev->get_file(), file);
783 * If the current file is greater than zero, it means we probably
784 * have some bad count of EOF marks, so mark tape in error. Otherwise
785 * the operator might have moved the tape, so we just release it
789 mark_volume_in_error();
800 * If we are reading, we come here at the end of the tape
801 * and see if there are more volumes to be mounted.
803 bool mount_next_read_volume(DCR *dcr)
805 DEVICE *dev = dcr->dev;
807 Dmsg2(90, "NumReadVolumes=%d CurReadVolume=%d\n", jcr->NumReadVolumes, jcr->CurReadVolume);
809 volume_unused(dcr); /* release current volume */
811 * End Of Tape -- mount next Volume (if another specified)
813 if (jcr->NumReadVolumes > 1 && jcr->CurReadVolume < jcr->NumReadVolumes) {
815 if (!acquire_device_for_read(dcr)) {
816 Jmsg2(jcr, M_FATAL, 0, _("Cannot open Dev=%s, Vol=%s\n"), dev->print_name(),
820 return true; /* next volume mounted */
822 Dmsg0(90, "End of Device reached.\n");