diff --git a/server/scanner.js b/server/scanner.js
index b74944c..058dc2e 100755
--- a/server/scanner.js
+++ b/server/scanner.js
@@ -281,19 +281,30 @@ const processBlock = async (items) => {
     return b.stats.mtime - a.stats.mtime;
   });
 
-  let toProcess = processing.length, lastMessage = moment();
+  let toProcess = processing.length;
 
   setStatus(`Items to be processed: ${toProcess}`);
 
   const updateHash = [],
     insertHash = [],
     updateAsset = [];
+
+  let last = 0,
+    lastTime = Date.now(),
+    start = Date.now();
     
   await Promise.map(processing, async (asset) => {
     toProcess--;
-    if (moment().add(-5, 'seconds') > lastMessage) {
-      setStatus("Items to be processed: " + toProcess);
-      lastMessage = moment();
+    const elapsed = Date.now() - lastTime;
+    if (elapsed > 5000) {
+      const processed = processing.length - toProcess,
+        rate = Math.ceil(100 * (processed - last) / elapsed) / 100,
+        eta = Math.ceil(toProcess * 
+          (((Date.now() - start) / 1000) / processed));
+      setStatus(`Processed ${processed}/${processing.length} ` +
+        `(${rate} assets/second). ETA ${eta}s`);
+      last = processed;
+      lastTime = Date.now();
     }
 
     /* Create JPG from RAW if there is a RAW file and no JPG */
@@ -311,38 +322,55 @@ const processBlock = async (items) => {
     asset.hash = await computeHash(
       picturesPath + asset.album.path + asset.filename)
   
+    /* Scan for existing DB entries -- this is a promise, which
+     * means the closure for the *Hash lists could introduce a race 
+     * condition where the array didn't contain a match prior to calling
+     * the DB, but during the DB transaction, a match came into being
+     */
+    const results = await photoDB.sequelize.query(
+      "SELECT photohashes.*,photos.filename,albums.path FROM photohashes " +
+      "LEFT JOIN photos ON (photos.id=photohashes.photoId) " +
+      "LEFT JOIN albums ON (albums.id=photos.albumId) " +
+      "WHERE hash=:hash OR photoId=:id", {
+      replacements: asset,
+      type: photoDB.sequelize.QueryTypes.SELECT
+    });
+
     /* Writes to DB for new assets hasn't happened yet, so the DB
-     * won't have new duplicates */
-    let duplicate = insertHash.find(entry => entry.hash === asset.hash)
-      || updateHash.find(entry => entry.hash === asset.hash);
+    * won't have new duplicates */
+    let duplicate;
 
-    let results = [];
-    
-    /* In addition to checking new entries, check the DB for old
-     * duplicates */
-    if (!duplicate) {
-        results = await photoDB.sequelize.query(
-        "SELECT photohashes.*,photos.filename,albums.path FROM photohashes " +
-        "LEFT JOIN photos ON (photos.id=photohashes.photoId) " +
-        "LEFT JOIN albums ON (albums.id=photos.albumId) " +
-        "WHERE hash=:hash OR photoId=:id", {
-        replacements: asset,
-        type: photoDB.sequelize.QueryTypes.SELECT
-      });
-
-      if (results.length == 0) {
+    if (results.length == 0) {
+      duplicate = insertHash.find(entry => entry.hash === asset.hash);
+      if (duplicate) {
+        console.log(`DUPLICATE in INSERT hash list (${insertHash.length}) ` +
+          `for ${duplicate.filename}`);
+      } else {
         insertHash.push(asset);
-      } else if (results[0].hash != asset.hash) {
-        updateHash.push(asset);
-      } else if (results[0].photoId != asset.id) {
-        duplicate = results[0];
       }
+    } else if (results[0].hash != asset.hash) {
+      duplicate = updateHash.find(entry => entry.hash === asset.hash);
+      if (duplicate) {
+        console.log(`DUPLICATE in UPDATE hash list (${updateHash.length}) ` +
+          `for ${duplicate.filename}`);
+      } else {
+        updateHash.push(asset);
+      }
+    } else if (results[0].photoId != asset.id) {
+      duplicate = results[0];
+      console.log(`DUPLICATE in HASH db for ${duplicate.filename}`);
     }
 
+    /* Output log information about duplicates */
     if (duplicate) {
-      setStatus("Duplicate asset: " + 
-        "'" + asset.album.path + asset.filename + "' is a copy of " +
-        "'" + duplicate.album.path + duplicate.filename + "'");
+      /* Fixup structure based on whether obtained from *Hash array or
+       * from DB */
+      if (!duplicate.path && duplicate.album) {
+        duplicate.path = duplicate.album.path;
+      }
+      setStatus(`Duplicate asset: ` + 
+        `'${asset.album.path}${asset.filename}' is a copy of ` +
+        `'${duplicate.path}${duplicate.filename}'`);
       if (asset.duplicate != duplicate.photoId) {
         asset.duplicate = duplicate.photoId;
         duplicates.push(asset);
@@ -374,6 +402,33 @@ const processBlock = async (items) => {
   });
 
   try {
+    console.log(`Updating ${updateAsset.length} asset entries.`);
+    await photoDB.sequelize.transaction(async (t) => {
+      /* Update the DB with the image information */
+      await Promise.mapSeries(updateAsset, async (item) => {
+        await photoDB.sequelize.query("UPDATE photos SET " +
+          "added=:added,modified=:modified,taken=:taken,width=:width," +
+          "height=:height,size=:size,scanned=CURRENT_TIMESTAMP " +
+          "WHERE id=:id", {
+          replacements: item,
+          transaction: t
+        });
+      });
+    });
+  } catch (error) {
+    console.error(error);
+    process.exit(-1);
+  }
+
+  /* Run UPDATE for hashes first in case a new photo is being added
+   * that has the same hash as an OLD entry. This could happen
+   * if an original file is COPIED and the original DB entry is 
+   * edited (UPDATE), and the original is moved elsewhere (INSERT)
+   * 
+   * If the UPDATE does not occur first, the INSERT will fail.
+   */
+  try {
+    console.log(`Updating ${updateHash.length} asset HASH entries.`);
     await photoDB.sequelize.transaction(async (t) => {
       await Promise.mapSeries(updateHash, async (item) => {
         await photoDB.sequelize.query(
@@ -383,17 +438,8 @@ const processBlock = async (items) => {
         });
       });
     });
-    await photoDB.sequelize.transaction(async (t) => {
-      /* Update the DB with the image information */
-      await Promise.mapSeries(updateAsset, async (item) => {
-        await photoDB.sequelize.query("UPDATE photos SET " +
-          "added=:added,modified=:modified,taken=:taken,width=:width,height=:height,size=:size,scanned=CURRENT_TIMESTAMP " +
-          "WHERE id=:id", {
-          replacements: item,
-          transaction: t
-        });
-      });
-    });
+
+    console.log(`Inserting ${insertHash.length} HASH entries.`);
     await photoDB.sequelize.transaction(async (t) => {
       await Promise.mapSeries(insertHash, async (item) => {
         await photoDB.sequelize.query(