--- /dev/null
+Index: src/stored/mount.c
+===================================================================
+--- src/stored/mount.c (revision 6978)
++++ src/stored/mount.c (working copy)
+@@ -290,7 +290,9 @@
+ if (!is_eod_valid()) {
+ goto mount_next_vol;
+ }
+-
++ if (!dev->VolCatInfo.VolFirstWritten) {
++ dev->VolCatInfo.VolFirstWritten = time(NULL);
++ }
+ dev->VolCatInfo.VolCatMounts++; /* Update mounts */
+ Dmsg1(150, "update volinfo mounts=%d\n", dev->VolCatInfo.VolCatMounts);
+ if (!dir_update_volume_info(dcr, false, false)) {