diff --git a/apis/filesystem/src/main/java/org/jclouds/filesystem/FilesystemAsyncBlobStore.java b/apis/filesystem/src/main/java/org/jclouds/filesystem/FilesystemAsyncBlobStore.java
index 81b93f980f..aad185533a 100644
--- a/apis/filesystem/src/main/java/org/jclouds/filesystem/FilesystemAsyncBlobStore.java
+++ b/apis/filesystem/src/main/java/org/jclouds/filesystem/FilesystemAsyncBlobStore.java
@@ -457,17 +457,22 @@ public class FilesystemAsyncBlobStore extends BaseAsyncBlobStore {
       String blobKey = blob.getMetadata().getName();
 
       logger.debug("Put blob with key [%s] to container [%s]", blobKey, containerName);
-      String eTag = getEtag(blob);
+      if (!storageStrategy.containerExists(containerName)) {
+         return Futures.immediateFailedFuture(new IllegalStateException("containerName not found: " + containerName));
+      }
+
       try {
          // TODO
          // must override existing file?
 
-         storageStrategy.writePayloadOnFile(containerName, blobKey, blob.getPayload());
+         storageStrategy.putBlob(containerName, blob);
       } catch (IOException e) {
          logger.error(e, "An error occurred storing the new blob with name [%s] to container [%s].", blobKey,
                containerName);
          Throwables.propagate(e);
       }
+
+      String eTag = getEtag(blob);
       return immediateFuture(eTag);
    }
 
@@ -591,13 +596,6 @@ public class FilesystemAsyncBlobStore extends BaseAsyncBlobStore {
       }
    }
 
-   private Blob copyBlob(Blob blob) {
-      Blob returnVal = blobFactory.create(copy(blob.getMetadata()));
-      returnVal.setPayload(blob.getPayload());
-      copyPayloadHeadersToBlob(blob.getPayload(), returnVal);
-      return returnVal;
-   }
-
    /**
     * Calculates the object MD5 and returns it as eTag
     * 
@@ -616,6 +614,13 @@ public class FilesystemAsyncBlobStore extends BaseAsyncBlobStore {
       return eTag;
    }
 
+   private Blob copyBlob(Blob blob) {
+      Blob returnVal = blobFactory.create(copy(blob.getMetadata()));
+      returnVal.setPayload(blob.getPayload());
+      copyPayloadHeadersToBlob(blob.getPayload(), returnVal);
+      return returnVal;
+   }
+
    @Override
    protected boolean deleteAndVerifyContainerGone(final String container) {
       storageStrategy.deleteContainer(container);
diff --git a/apis/filesystem/src/main/java/org/jclouds/filesystem/strategy/FilesystemStorageStrategy.java b/apis/filesystem/src/main/java/org/jclouds/filesystem/strategy/FilesystemStorageStrategy.java
index a0c8662b63..fc648f1092 100644
--- a/apis/filesystem/src/main/java/org/jclouds/filesystem/strategy/FilesystemStorageStrategy.java
+++ b/apis/filesystem/src/main/java/org/jclouds/filesystem/strategy/FilesystemStorageStrategy.java
@@ -169,11 +169,11 @@ public interface FilesystemStorageStrategy {
     void removeBlob(String container, String key);
 
     /**
-     * Write a {@link Blob} {@link Payload} into a file
-     * @param fileName
-     * @param payload
+     * Write a {@link Blob} into a file
+     * @param container
+     * @param blob
      * @throws IOException
      */
-    void writePayloadOnFile(String container, String blobKey, Payload payload) throws IOException;
+    void putBlob(String containerName, Blob blob) throws IOException;
 
 }
diff --git a/apis/filesystem/src/main/java/org/jclouds/filesystem/strategy/internal/FilesystemStorageStrategyImpl.java b/apis/filesystem/src/main/java/org/jclouds/filesystem/strategy/internal/FilesystemStorageStrategyImpl.java
index b3ea8bf275..918f9d21c2 100644
--- a/apis/filesystem/src/main/java/org/jclouds/filesystem/strategy/internal/FilesystemStorageStrategyImpl.java
+++ b/apis/filesystem/src/main/java/org/jclouds/filesystem/strategy/internal/FilesystemStorageStrategyImpl.java
@@ -204,19 +204,13 @@ public class FilesystemStorageStrategyImpl implements FilesystemStorageStrategy
       return blobFile;
    }
 
-   /**
-    * Write a {@link Blob} {@link Payload} into a file
-    * 
-    * @param container
-    * @param blobKey
-    * @param payload
-    * @throws IOException
-    */
    @Override
-   public void writePayloadOnFile(String container, String blobKey, Payload payload) throws IOException {
-      filesystemContainerNameValidator.validate(container);
+   public void putBlob(final String containerName, final Blob blob) throws IOException {
+      String blobKey = blob.getMetadata().getName();
+      Payload payload = blob.getPayload();
+      filesystemContainerNameValidator.validate(containerName);
       filesystemBlobKeyValidator.validate(blobKey);
-      File outputFile = getFileForBlobKey(container, blobKey);
+      File outputFile = getFileForBlobKey(containerName, blobKey);
       FileOutputStream output = null;
       try {
          Files.createParentDirs(outputFile);
diff --git a/apis/filesystem/src/test/java/org/jclouds/filesystem/FilesystemAsyncBlobStoreTest.java b/apis/filesystem/src/test/java/org/jclouds/filesystem/FilesystemAsyncBlobStoreTest.java
index c8d3b0d844..aa6bbabcc0 100644
--- a/apis/filesystem/src/test/java/org/jclouds/filesystem/FilesystemAsyncBlobStoreTest.java
+++ b/apis/filesystem/src/test/java/org/jclouds/filesystem/FilesystemAsyncBlobStoreTest.java
@@ -740,6 +740,7 @@ public class FilesystemAsyncBlobStoreTest {
          * can't be deleted. See http://code.google.com/p/jclouds/issues/detail?id=737
          */
         final String containerName = "containerWithRanges";
+        blobStore.createContainerInLocation(null, containerName);
         String payload = "abcdefgh";
         InputStream is;
         Blob blob = blobStore.blobBuilder("test").payload(new StringPayload(payload)).build();
diff --git a/apis/filesystem/src/test/java/org/jclouds/filesystem/strategy/internal/FilesystemStorageStrategyImplTest.java b/apis/filesystem/src/test/java/org/jclouds/filesystem/strategy/internal/FilesystemStorageStrategyImplTest.java
index dd248ee802..69c6ce1a05 100644
--- a/apis/filesystem/src/test/java/org/jclouds/filesystem/strategy/internal/FilesystemStorageStrategyImplTest.java
+++ b/apis/filesystem/src/test/java/org/jclouds/filesystem/strategy/internal/FilesystemStorageStrategyImplTest.java
@@ -371,8 +371,10 @@ public class FilesystemStorageStrategyImplTest {
       blobKey = TestUtils.createRandomBlobKey("writePayload-", ".img");
       sourceFile = TestUtils.getImageForBlobPayload();
       filePayload = new FilePayload(sourceFile);
+      Blob blob = storageStrategy.newBlob(blobKey);
+      blob.setPayload(filePayload);
       // write files
-      storageStrategy.writePayloadOnFile(CONTAINER_NAME, blobKey, filePayload);
+      storageStrategy.putBlob(CONTAINER_NAME, blob);
       // verify that the files is equal
       File blobFullPath = new File(TARGET_CONTAINER_NAME, blobKey);
       InputSupplier<FileInputStream> expectedInput =
diff --git a/blobstore/src/main/java/org/jclouds/blobstore/TransientAsyncBlobStore.java b/blobstore/src/main/java/org/jclouds/blobstore/TransientAsyncBlobStore.java
index e8fcd51b1b..430c205866 100644
--- a/blobstore/src/main/java/org/jclouds/blobstore/TransientAsyncBlobStore.java
+++ b/blobstore/src/main/java/org/jclouds/blobstore/TransientAsyncBlobStore.java
@@ -472,7 +472,8 @@ public class TransientAsyncBlobStore extends BaseAsyncBlobStore {
 
       storageStrategy.putBlob(containerName, blob);
 
-      return immediateFuture(Iterables.getOnlyElement(blob.getAllHeaders().get(HttpHeaders.ETAG)));
+      String eTag = getEtag(blob);
+      return immediateFuture(eTag);
    }
 
    private Blob createUpdatedCopyOfBlobInContainer(String containerName, Blob in) {
@@ -635,6 +636,24 @@ public class TransientAsyncBlobStore extends BaseAsyncBlobStore {
       }
    }
 
+   /**
+    * Calculates the object MD5 and returns it as eTag
+    * 
+    * @param object
+    * @return
+    */
+   private String getEtag(Blob object) {
+      try {
+         Payloads.calculateMD5(object, crypto.md5());
+      } catch (IOException ex) {
+         logger.error(ex, "An error occurred calculating MD5 for object with name %s.", object.getMetadata().getName());
+         Throwables.propagate(ex);
+      }
+
+      String eTag = CryptoStreams.hex(object.getPayload().getContentMetadata().getContentMD5());
+      return eTag;
+   }
+
    private Blob copyBlob(Blob blob) {
       Blob returnVal = blobFactory.create(copy(blob.getMetadata()));
       returnVal.setPayload(blob.getPayload());