2 Bacula® - The Network Backup Solution
4 Copyright (C) 2002-2010 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
37 #include "bacula.h" /* pull in global headers */
38 #include "stored.h" /* pull in Storage Deamon headers */
56 * If release is set, we rewind the current volume,
57 * which we no longer want, and ask the user (console)
58 * to mount the next volume.
60 * Continue trying until we get it, and then ensure
61 * that we can write on it.
63 * This routine returns a 0 only if it is REALLY
64 * impossible to get the requested Volume.
66 * This routine is entered with the device blocked, but not
70 bool DCR::mount_next_write_volume()
73 bool ask = false, recycle, autochanger;
77 Dmsg2(150, "Enter mount_next_volume(release=%d) dev=%s\n", dev->must_unload(),
80 init_device_wait_timers(dcr);
84 * Attempt to mount the next volume. If something non-fatal goes
85 * wrong, we come back here to re-try (new op messages, re-read
89 Dmsg1(150, "mount_next_vol retry=%d\n", retry);
90 /* Ignore retry if this is poll request */
91 if (!dev->poll && retry++ > 4) {
92 /* Last ditch effort before giving up, force operator to respond */
95 if (!dir_ask_sysop_to_mount_volume(dcr, ST_APPEND)) {
96 Jmsg(jcr, M_FATAL, 0, _("Too many errors trying to mount device %s.\n"),
98 goto no_lock_bail_out;
101 Dmsg1(150, "Continue after dir_ask_sysop_to_mount. must_load=%d\n", dev->must_load());
103 if (job_canceled(jcr)) {
104 Jmsg(jcr, M_FATAL, 0, _("Job %d canceled.\n"), jcr->JobId);
109 if (dev->must_unload()) {
110 ask = true; /* ask operator to mount tape */
114 do_swapping(true /*is_writing*/);
115 do_load(true /*is_writing*/);
118 if (!find_a_volume()) {
119 goto no_lock_bail_out;
122 if (job_canceled(jcr)) {
125 Dmsg3(150, "After find_next_append. Vol=%s Slot=%d Parts=%d\n",
126 VolCatInfo.VolCatName, VolCatInfo.Slot, VolCatInfo.VolCatParts);
129 * Get next volume and ready it for append
130 * This code ensures that the device is ready for
131 * writing. We start from the assumption that there
132 * may not be a tape mounted.
134 * If the device is a file, we create the output
135 * file. If it is a tape, we check the volume name
136 * and move the tape to the end of data.
140 if (autoload_device(dcr, true/*writing*/, NULL) > 0) {
149 Dmsg1(150, "autoload_dev returns %d\n", autochanger);
151 * If we autochanged to correct Volume or (we have not just
152 * released the Volume AND we can automount) we go ahead
153 * and read the label. If there is no tape in the drive,
154 * we will fail, recurse and ask the operator the next time.
156 if (!dev->must_unload() && dev->is_tape() && dev->has_cap(CAP_AUTOMOUNT)) {
157 Dmsg0(250, "(1)Ask=0\n");
158 ask = false; /* don't ask SYSOP this time */
160 /* Don't ask if not removable */
161 if (!dev->is_removable()) {
162 Dmsg0(250, "(2)Ask=0\n");
165 Dmsg2(250, "Ask=%d autochanger=%d\n", ask, autochanger);
169 if (!dir_ask_sysop_to_mount_volume(dcr, ST_APPEND)) {
170 Dmsg0(150, "Error return ask_sysop ...\n");
171 goto no_lock_bail_out;
175 if (job_canceled(jcr)) {
178 Dmsg3(150, "want vol=%s devvol=%s dev=%s\n", VolumeName,
179 dev->VolHdr.VolumeName, dev->print_name());
181 if (dev->poll && dev->has_cap(CAP_CLOSEONPOLL)) {
186 /* Ensure the device is open */
187 if (dev->has_cap(CAP_STREAM)) {
188 mode = OPEN_WRITE_ONLY;
190 mode = OPEN_READ_WRITE;
192 /* Try autolabel if enabled */
193 if (dev->open(dcr, mode) < 0) {
194 try_autolabel(false); /* try to create a new volume label */
196 while (dev->open(dcr, mode) < 0) {
197 Dmsg1(150, "open_device failed: ERR=%s\n", dev->bstrerror());
198 if ((dev->is_file() && dev->is_removable()) || dev->is_dvd()) {
200 Dmsg0(150, "call scan_dir_for_vol\n");
202 if (!dev->mount(0)) {
206 if (ok && dev->scan_dir_for_volume(dcr)) {
207 if (dev->open(dcr, mode) >= 0) {
208 break; /* got a valid volume */
211 if (ok && dev->is_dvd()) {
215 if (try_autolabel(false) == try_read_vol) {
216 break; /* created a new volume label */
218 Jmsg3(jcr, M_WARNING, 0, _("Open device %s Volume \"%s\" failed: ERR=%s\n"),
219 dev->print_name(), dcr->VolumeName, dev->bstrerror());
220 Dmsg0(50, "set_unload\n");
221 dev->set_unload(); /* force ask sysop */
223 Dmsg0(150, "goto mount_next_vol\n");
228 * Now check the volume label to make sure we have the right tape mounted
231 switch (check_volume_label(ask, autochanger)) {
233 Dmsg0(50, "set_unload\n");
234 dev->set_unload(); /* want a different Volume */
235 Dmsg0(150, "goto mount_next_vol\n");
246 * See if we have a fresh tape or a tape with data.
248 * Note, if the LabelType is PRE_LABEL, it was labeled
249 * but never written. If so, rewrite the label but set as
250 * VOL_LABEL. We rewind and return the label (reconstructed)
251 * in the block so that in the case of a new tape, data can
252 * be appended just after the block label. If we are writing
253 * a second volume, the calling routine will write the label
254 * before writing the overflow block.
256 * If the tape is marked as Recycle, we rewrite the label.
258 recycle = strcmp(dev->VolCatInfo.VolCatStatus, "Recycle") == 0;
259 if (dev->VolHdr.LabelType == PRE_LABEL || recycle) {
260 if (!rewrite_volume_label(dcr, recycle)) {
261 mark_volume_in_error();
266 * OK, at this point, we have a valid Bacula label, but
267 * we need to position to the end of the volume, since we are
268 * just now putting it into append mode.
270 Dmsg1(100, "Device previously written, moving to end of data. Expect %lld bytes\n",
271 dev->VolCatInfo.VolCatBytes);
272 Jmsg(jcr, M_INFO, 0, _("Volume \"%s\" previously written, moving to end of data.\n"),
275 if (!dev->eod(dcr)) {
276 Dmsg2(050, "Unable to position to end of data on device %s: ERR=%s\n",
277 dev->print_name(), dev->bstrerror());
278 Jmsg(jcr, M_ERROR, 0, _("Unable to position to end of data on device %s: ERR=%s\n"),
279 dev->print_name(), dev->bstrerror());
280 mark_volume_in_error();
283 if (!is_eod_valid()) {
284 Dmsg0(100, "goto mount_next_vol\n");
288 dev->VolCatInfo.VolCatMounts++; /* Update mounts */
289 Dmsg1(150, "update volinfo mounts=%d\n", dev->VolCatInfo.VolCatMounts);
290 if (!dir_update_volume_info(dcr, false, false)) {
294 /* Return an empty block */
295 empty_block(block); /* we used it for reading so set for write */
298 Dmsg1(150, "set APPEND, normal return from mount_next_write_volume. dev=%s\n",
312 * This routine is meant to be called once the first pass
313 * to ensure that we have a candidate volume to mount.
314 * Otherwise, we ask the sysop to created one.
315 * Note, the the Volumes are locked on entry.
316 * They are unlocked on failure and remain locked on
317 * success. The caller must know this!!!
319 bool DCR::find_a_volume()
322 if (!is_suitable_volume_mounted()) {
323 bool have_vol = false;
324 /* Do we have a candidate volume? */
326 bstrncpy(VolumeName, dev->vol->vol_name, sizeof(VolumeName));
327 have_vol = dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE);
330 * Get Director's idea of what tape we should have mounted.
334 Dmsg0(200, "Before dir_find_next_appendable_volume.\n");
335 while (!dir_find_next_appendable_volume(dcr)) {
336 Dmsg0(200, "not dir_find_next\n");
337 if (job_canceled(jcr)) {
342 if (!dir_ask_sysop_to_create_appendable_volume(dcr)) {
346 Dmsg0(150, "Again dir_find_next_append...\n");
353 int DCR::check_volume_label(bool &ask, bool &autochanger)
355 int vol_label_status;
357 * If we are writing to a stream device, ASSUME the volume label
360 if (dev->has_cap(CAP_STREAM)) {
361 vol_label_status = VOL_OK;
362 create_volume_label(dev, VolumeName, "Default", false /* not DVD */);
363 dev->VolHdr.LabelType = PRE_LABEL;
365 vol_label_status = read_dev_volume_label(this);
367 if (job_canceled(jcr)) {
371 Dmsg2(150, "Want dirVol=%s dirStat=%s\n", VolumeName,
372 VolCatInfo.VolCatStatus);
374 * At this point, dev->VolCatInfo has what is in the drive, if anything,
375 * and dcr->VolCatInfo has what the Director wants.
377 switch (vol_label_status) {
379 Dmsg1(150, "Vol OK name=%s\n", dev->VolHdr.VolumeName);
380 dev->VolCatInfo = VolCatInfo; /* structure assignment */
381 break; /* got a Volume */
383 VOLUME_CAT_INFO dcrVolCatInfo, devVolCatInfo;
384 char saveVolumeName[MAX_NAME_LENGTH];
386 Dmsg2(150, "Vol NAME Error Have=%s, want=%s\n", dev->VolHdr.VolumeName, VolumeName);
387 if (dev->is_volume_to_unload()) {
389 goto check_next_volume;
392 /* If not removable, Volume is broken */
393 if (!dev->is_removable()) {
394 Jmsg(jcr, M_WARNING, 0, _("Volume \"%s\" not on device %s.\n"),
395 VolumeName, dev->print_name());
396 mark_volume_in_error();
397 goto check_next_volume;
401 * OK, we got a different volume mounted. First save the
402 * requested Volume info (dcr) structure, then query if
403 * this volume is really OK. If not, put back the desired
404 * volume name, mark it not in changer and continue.
406 dcrVolCatInfo = VolCatInfo; /* structure assignment */
407 devVolCatInfo = dev->VolCatInfo; /* structure assignment */
408 /* Check if this is a valid Volume in the pool */
409 bstrncpy(saveVolumeName, VolumeName, sizeof(saveVolumeName));
410 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
411 if (!dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE)) {
412 POOL_MEM vol_info_msg;
413 pm_strcpy(vol_info_msg, jcr->dir_bsock->msg); /* save error message */
414 /* Restore desired volume name, note device info out of sync */
415 /* This gets the info regardless of the Pool */
416 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
417 if (autochanger && !dir_get_volume_info(this, GET_VOL_INFO_FOR_READ)) {
419 * If we get here, we know we cannot write on the Volume,
420 * and we know that we cannot read it either, so it
421 * is not in the autochanger.
423 mark_volume_not_inchanger();
425 dev->VolCatInfo = devVolCatInfo; /* structure assignment */
426 dev->set_unload(); /* unload this volume */
427 Jmsg(jcr, M_WARNING, 0, _("Director wanted Volume \"%s\".\n"
428 " Current Volume \"%s\" not acceptable because:\n"
430 dcrVolCatInfo.VolCatName, dev->VolHdr.VolumeName,
431 vol_info_msg.c_str());
433 /* Restore saved DCR before continuing */
434 bstrncpy(VolumeName, saveVolumeName, sizeof(VolumeName));
435 VolCatInfo = dcrVolCatInfo; /* structure assignment */
436 goto check_next_volume;
439 * This was not the volume we expected, but it is OK with
440 * the Director, so use it.
442 Dmsg1(150, "Got new Volume name=%s\n", VolumeName);
443 dev->VolCatInfo = VolCatInfo; /* structure assignment */
444 Dmsg1(100, "Call reserve_volume=%s\n", dev->VolHdr.VolumeName);
445 if (reserve_volume(this, dev->VolHdr.VolumeName) == NULL) {
446 Jmsg2(jcr, M_WARNING, 0, _("Could not reserve volume %s on %s\n"),
447 dev->VolHdr.VolumeName, dev->print_name());
449 goto check_next_volume;
451 break; /* got a Volume */
453 * At this point, we assume we have a blank tape mounted.
457 Jmsg(jcr, M_FATAL, 0, "%s", jcr->errmsg);
458 mark_volume_in_error();
459 goto check_bail_out; /* we could not write on DVD */
461 /* Fall through wanted */
463 switch (try_autolabel(true)) {
465 goto check_next_volume;
467 goto check_read_volume;
473 /* NOTE! Fall-through wanted. */
476 Dmsg0(200, "VOL_NO_MEDIA or default.\n");
477 /* Send error message */
480 Dmsg1(200, "Msg suppressed by poll: %s\n", jcr->errmsg);
483 /* Needed, so the medium can be changed */
484 if (dev->requires_mount()) {
488 goto check_next_volume;
493 return check_next_vol;
499 return check_read_vol;
504 bool DCR::is_suitable_volume_mounted()
506 /* Volume mounted? */
507 if (dev->VolHdr.VolumeName[0] == 0 || dev->swap_dev || dev->must_unload()) {
508 return false; /* no */
510 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
511 return dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE);
514 bool DCR::do_unload()
516 if (dev->must_unload()) {
517 Dmsg1(100, "must_unload release %s\n", dev->print_name());
523 bool DCR::do_load(bool is_writing)
525 if (dev->must_load()) {
526 Dmsg1(100, "Must load %s\n", dev->print_name());
527 if (autoload_device(this, is_writing, NULL) > 0) {
536 void DCR::do_swapping(bool is_writing)
539 * See if we are asked to swap the Volume from another device
540 * if so, unload the other device here, and attach the
541 * volume to our drive.
544 if (dev->swap_dev->must_unload()) {
546 dev->swap_dev->set_slot(dev->vol->get_slot());
548 Dmsg2(100, "Swap unloading slot=%d %s\n", dev->swap_dev->get_slot(),
549 dev->swap_dev->print_name());
550 unload_dev(this, dev->swap_dev);
553 dev->vol->clear_swapping();
554 Dmsg1(100, "=== set in_use vol=%s\n", dev->vol->vol_name);
555 dev->vol->set_in_use();
556 dev->VolHdr.VolumeName[0] = 0; /* don't yet have right Volume */
558 Dmsg1(100, "No vol on dev=%s\n", dev->print_name());
560 if (dev->swap_dev->vol) {
561 Dmsg2(100, "Vol=%s on dev=%s\n", dev->swap_dev->vol->vol_name,
562 dev->swap_dev->print_name());
564 dev->swap_dev = NULL;
570 * Check if the current position on the volume corresponds to
571 * what is in the catalog.
573 bool DCR::is_eod_valid()
576 char ed1[50], ed2[50];
577 if (dev->VolCatInfo.VolCatBytes == dev->part_start + dev->part_size) {
578 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\""
579 " part=%d size=%s\n"), VolumeName,
580 dev->part, edit_uint64(dev->VolCatInfo.VolCatBytes,ed1));
582 Jmsg(jcr, M_ERROR, 0, _("Bacula cannot write on DVD Volume \"%s\" because: "
583 "The sizes do not match! Volume=%s Catalog=%s\n"),
585 edit_uint64(dev->part_start + dev->part_size, ed1),
586 edit_uint64(dev->VolCatInfo.VolCatBytes, ed2));
587 mark_volume_in_error();
590 } else if (dev->is_tape()) {
592 * Check if we are positioned on the tape at the same place
593 * that the database says we should be.
595 if (dev->VolCatInfo.VolCatFiles == dev->get_file()) {
596 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\" at file=%d.\n"),
597 VolumeName, dev->get_file());
599 Jmsg(jcr, M_ERROR, 0, _("Bacula cannot write on tape Volume \"%s\" because:\n"
600 "The number of files mismatch! Volume=%u Catalog=%u\n"),
601 VolumeName, dev->get_file(), dev->VolCatInfo.VolCatFiles);
602 mark_volume_in_error();
605 } else if (dev->is_file()) {
606 char ed1[50], ed2[50];
608 pos = dev->lseek(this, (boffset_t)0, SEEK_END);
609 if (dev->VolCatInfo.VolCatBytes == (uint64_t)pos) {
610 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\""
611 " size=%s\n"), VolumeName,
612 edit_uint64(dev->VolCatInfo.VolCatBytes, ed1));
614 Mmsg(jcr->errmsg, _("Bacula cannot write on disk Volume \"%s\" because: "
615 "The sizes do not match! Volume=%s Catalog=%s\n"),
617 edit_uint64(pos, ed1),
618 edit_uint64(dev->VolCatInfo.VolCatBytes, ed2));
619 Jmsg(jcr, M_ERROR, 0, jcr->errmsg);
620 Dmsg0(050, jcr->errmsg);
621 mark_volume_in_error();
630 * If permitted, we label the device, make sure we can do
631 * it by checking that the VolCatBytes is zero => not labeled,
632 * once the Volume is labeled we don't want to label another
633 * blank tape with the same name. For disk, we go ahead and
634 * label it anyway, because the OS insures that there is only
635 * one Volume with that name.
636 * As noted above, at this point dcr->VolCatInfo has what
637 * the Director wants and dev->VolCatInfo has info on the
638 * previous tape (or nothing).
641 * try_next_vol label failed, look for another volume
642 * try_read_vol labeled volume, now re-read the label
643 * try_error hard error (catalog update)
644 * try_default I couldn't do anything
646 int DCR::try_autolabel(bool opened)
650 if (dev->poll && !dev->is_tape()) {
651 return try_default; /* if polling, don't try to create new labels */
653 /* For a tape require it to be opened and read before labeling */
654 if (!opened && dev->is_tape()) {
657 if (dev->has_cap(CAP_LABEL) && (VolCatInfo.VolCatBytes == 0 ||
658 (!dev->is_tape() && strcmp(VolCatInfo.VolCatStatus,
660 Dmsg0(150, "Create volume label\n");
661 /* Create a new Volume label and write it to the device */
662 if (!write_new_volume_label_to_dev(dcr, VolumeName,
663 pool_name, false, /* no relabel */ false /* defer DVD label */)) {
664 Dmsg2(150, "write_vol_label failed. vol=%s, pool=%s\n",
665 VolumeName, pool_name);
667 mark_volume_in_error();
671 Dmsg0(150, "dir_update_vol_info. Set Append\n");
672 /* Copy Director's info into the device info */
673 dev->VolCatInfo = VolCatInfo; /* structure assignment */
674 if (!dir_update_volume_info(dcr, true, true)) { /* indicate tape labeled */
677 Jmsg(dcr->jcr, M_INFO, 0, _("Labeled new Volume \"%s\" on device %s.\n"),
678 VolumeName, dev->print_name());
679 return try_read_vol; /* read label we just wrote */
681 if (!dev->has_cap(CAP_LABEL) && VolCatInfo.VolCatBytes == 0) {
682 Jmsg(jcr, M_WARNING, 0, _("Device %s not configured to autolabel Volumes.\n"),
685 /* If not removable, Volume is broken */
686 if (!dev->is_removable()) {
687 Jmsg(jcr, M_WARNING, 0, _("Volume \"%s\" not on device %s.\n"),
688 VolumeName, dev->print_name());
689 mark_volume_in_error();
697 * Mark volume in error in catalog
699 void DCR::mark_volume_in_error()
701 Jmsg(jcr, M_INFO, 0, _("Marking Volume \"%s\" in Error in Catalog.\n"),
703 dev->VolCatInfo = VolCatInfo; /* structure assignment */
704 bstrncpy(dev->VolCatInfo.VolCatStatus, "Error", sizeof(dev->VolCatInfo.VolCatStatus));
705 Dmsg0(150, "dir_update_vol_info. Set Error.\n");
706 dir_update_volume_info(this, false, false);
708 Dmsg0(50, "set_unload\n");
709 dev->set_unload(); /* must get a new volume */
713 * The Volume is not in the correct slot, so mark this
714 * Volume as not being in the Changer.
716 void DCR::mark_volume_not_inchanger()
718 Jmsg(jcr, M_ERROR, 0, _("Autochanger Volume \"%s\" not found in slot %d.\n"
719 " Setting InChanger to zero in catalog.\n"),
720 VolCatInfo.VolCatName, VolCatInfo.Slot);
721 dev->VolCatInfo = VolCatInfo; /* structure assignment */
722 VolCatInfo.InChanger = false;
723 dev->VolCatInfo.InChanger = false;
724 Dmsg0(400, "update vol info in mount\n");
725 dir_update_volume_info(this, true, false); /* set new status */
729 * Either because we are going to hang a new volume, or because
730 * of explicit user request, we release the current volume.
732 void DCR::release_volume()
734 unload_autochanger(this, -1);
737 Jmsg0(jcr, M_ERROR, 0, _("Hey!!!!! WroteVol non-zero !!!!!\n"));
738 Pmsg0(190, "Hey!!!!! WroteVol non-zero !!!!!\n");
741 * First erase all memory of the current volume
744 dev->block_num = dev->file = 0;
745 dev->EndBlock = dev->EndFile = 0;
746 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
748 /* Force re-read of label */
749 dev->clear_labeled();
752 dev->label_type = B_BACULA_LABEL;
755 if (dev->is_open() && (!dev->is_tape() || !dev->has_cap(CAP_ALWAYSOPEN))) {
759 /* If we have not closed the device, then at least rewind the tape */
760 if (dev->is_open()) {
761 dev->offline_or_rewind();
763 // Dmsg0(50, "set_unload\n");
764 // dev->set_unload();
765 Dmsg0(190, "release_volume\n");
771 * Check to see if the tape position as defined by the OS is
772 * the same as our concept. If it is not,
773 * it means the user has probably manually rewound the tape.
774 * Note, we check only if num_writers == 0, but this code will
775 * also work fine for any number of writers. If num_writers > 0,
776 * we probably should cancel all jobs using this device, or
777 * perhaps even abort the SD, or at a minimum, mark the tape
778 * in error. Another strategy with num_writers == 0, would be
779 * to rewind the tape and do a new eod() request.
781 bool DCR::is_tape_position_ok()
783 if (dev->is_tape() && dev->num_writers == 0) {
784 int32_t file = dev->get_os_tape_file();
785 if (file >= 0 && file != (int32_t)dev->get_file()) {
786 Jmsg(jcr, M_ERROR, 0, _("Invalid tape position on volume \"%s\""
787 " on device %s. Expected %d, got %d\n"),
788 dev->VolHdr.VolumeName, dev->print_name(), dev->get_file(), file);
790 * If the current file is greater than zero, it means we probably
791 * have some bad count of EOF marks, so mark tape in error. Otherwise
792 * the operator might have moved the tape, so we just release it
796 mark_volume_in_error();
807 * If we are reading, we come here at the end of the tape
808 * and see if there are more volumes to be mounted.
810 bool mount_next_read_volume(DCR *dcr)
812 DEVICE *dev = dcr->dev;
814 Dmsg2(90, "NumReadVolumes=%d CurReadVolume=%d\n", jcr->NumReadVolumes, jcr->CurReadVolume);
816 volume_unused(dcr); /* release current volume */
818 * End Of Tape -- mount next Volume (if another specified)
820 if (jcr->NumReadVolumes > 1 && jcr->CurReadVolume < jcr->NumReadVolumes) {
822 if (!acquire_device_for_read(dcr)) {
823 Jmsg2(jcr, M_FATAL, 0, _("Cannot open Dev=%s, Vol=%s\n"), dev->print_name(),
827 return true; /* next volume mounted */
829 Dmsg0(90, "End of Device reached.\n");