commit 9ddecaa80c15d1abd89f29c9185a464103d9d5aa
Author: Kern Sibbald <kern AT sibbald DOT com>
Date:   Fri Oct 16 07:50:48 2009 +0200

    Fix switching read device reported by Nicolae Mihalache <mache AT abcpages DOT com>

diff --git a/bacula/src/stored/acquire.c b/bacula/src/stored/acquire.c
index b2bf07e..7042440 100644
--- a/bacula/src/stored/acquire.c
+++ b/bacula/src/stored/acquire.c
@@ -63,7 +63,8 @@ bool acquire_device_for_read(DCR *dcr)
    int vol_label_status;
    int retry = 0;
    
-   Dmsg1(950, "jcr->dcr=%p\n", jcr->dcr);
+   Dmsg2(950, "dcr=%p dev=%p\n", dcr, dcr->dev);
+   Dmsg2(950, "MediaType dcr=%s dev=%s\n", dcr->media_type, dev->device->media_type);
    dev->dblock(BST_DOING_ACQUIRE);
 
    if (dev->num_writers > 0) {
@@ -123,6 +124,7 @@ bool acquire_device_for_read(DCR *dcr)
       lock_reservations();
       memset(&rctx, 0, sizeof(RCTX));
       rctx.jcr = jcr;
+      jcr->read_dcr = dcr;
       jcr->reserve_msgs = New(alist(10, not_owned_by_alist));
       rctx.any_drive = true;
       rctx.device_name = vol->device;
@@ -166,6 +168,7 @@ bool acquire_device_for_read(DCR *dcr)
          goto get_out;
       }
    }
+   Dmsg2(400, "MediaType dcr=%s dev=%s\n", dcr->media_type, dev->device->media_type);
 
    dev->clear_unload();
 
@@ -329,7 +332,8 @@ get_out:
    } else {
       dev->dunlock();               /* dunblock() unlock the device too */
    }
-   Dmsg1(950, "jcr->dcr=%p\n", jcr->dcr);
+   Dmsg2(950, "dcr=%p dev=%p\n", dcr, dcr->dev);
+   Dmsg2(950, "MediaType dcr=%s dev=%s\n", dcr->media_type, dev->device->media_type);
    return ok;
 }
 
diff --git a/bacula/src/stored/reserve.c b/bacula/src/stored/reserve.c
index a4fe70c..6824d16 100644
--- a/bacula/src/stored/reserve.c
+++ b/bacula/src/stored/reserve.c
@@ -634,7 +634,11 @@ static int reserve_device(RCTX &rctx)
 
    rctx.suitable_device = true;
    Dmsg1(dbglvl, "try reserve %s\n", rctx.device->hdr.name);
-   dcr = new_dcr(rctx.jcr, rctx.jcr->dcr, rctx.device->dev);
+   if (rctx.store->append) {
+      dcr = new_dcr(rctx.jcr, rctx.jcr->dcr, rctx.device->dev);
+   } else {
+      dcr = new_dcr(rctx.jcr, rctx.jcr->read_dcr, rctx.device->dev);
+   }
    if (!dcr) {
       BSOCK *dir = rctx.jcr->dir_bsock;
       dir->fsend(_("3926 Could not get dcr for device: %s\n"), rctx.device_name);