diff --git a/asterixdb/asterix-app/src/test/resources/cc-cloud-storage-gcs.conf b/asterixdb/asterix-app/src/test/resources/cc-cloud-storage-gcs.conf
index d0ebd24..ccb7f9d 100644
--- a/asterixdb/asterix-app/src/test/resources/cc-cloud-storage-gcs.conf
+++ b/asterixdb/asterix-app/src/test/resources/cc-cloud-storage-gcs.conf
@@ -64,7 +64,7 @@
 cloud.deployment=true
 storage.buffercache.pagesize=32KB
 storage.partitioning=static
-cloud.storage.scheme=gcs
+cloud.storage.scheme=gs
 cloud.storage.bucket=cloud-storage-container
 cloud.storage.region=us-west2
 cloud.storage.endpoint=http://127.0.0.1:4443
diff --git a/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/AbstractCloudIOManager.java b/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/AbstractCloudIOManager.java
index 8cf5ac5..9df26f2 100644
--- a/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/AbstractCloudIOManager.java
+++ b/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/AbstractCloudIOManager.java
@@ -239,14 +239,17 @@
     public final long doSyncWrite(IFileHandle fHandle, long offset, ByteBuffer[] dataArray)
             throws HyracksDataException {
         long writtenBytes = localIoManager.doSyncWrite(fHandle, offset, dataArray);
+        dataArray[0].flip();
+        dataArray[1].flip();
         cloudWrite(fHandle, dataArray);
         return writtenBytes;
     }
 
     @Override
-    public final int doSyncWrite(IFileHandle fHandle, long offset, ByteBuffer dataArray) throws HyracksDataException {
-        int writtenBytes = localIoManager.doSyncWrite(fHandle, offset, dataArray);
-        cloudWrite(fHandle, dataArray);
+    public final int doSyncWrite(IFileHandle fHandle, long offset, ByteBuffer data) throws HyracksDataException {
+        int writtenBytes = localIoManager.doSyncWrite(fHandle, offset, data);
+        data.flip();
+        cloudWrite(fHandle, data);
         return writtenBytes;
     }
 
diff --git a/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/clients/CloudClientProvider.java b/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/clients/CloudClientProvider.java
index 35ab467..d5f508d 100644
--- a/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/clients/CloudClientProvider.java
+++ b/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/clients/CloudClientProvider.java
@@ -27,7 +27,7 @@
 
 public class CloudClientProvider {
     private static final String S3 = "s3";
-    private static final String GCS = "gcs";
+    private static final String GCS = "gs";
 
     private CloudClientProvider() {
         throw new AssertionError("do not instantiate");
diff --git a/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/clients/google/gcs/GCSCloudClient.java b/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/clients/google/gcs/GCSCloudClient.java
index 9eb3fe0..9bcd386 100644
--- a/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/clients/google/gcs/GCSCloudClient.java
+++ b/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/clients/google/gcs/GCSCloudClient.java
@@ -204,7 +204,7 @@
     public boolean exists(String bucket, String path) {
         profiler.objectGet();
         Blob blob = gcsClient.get(bucket, path, Storage.BlobGetOption.fields(Storage.BlobField.values()));
-        return blob != null;
+        return blob != null && blob.exists();
     }
 
     @Override
diff --git a/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/clients/google/gcs/GCSWriter.java b/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/clients/google/gcs/GCSWriter.java
index cccd9ec..a6dade5 100644
--- a/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/clients/google/gcs/GCSWriter.java
+++ b/asterixdb/asterix-cloud/src/main/java/org/apache/asterix/cloud/clients/google/gcs/GCSWriter.java
@@ -40,7 +40,6 @@
     private final String path;
     private final IRequestProfiler profiler;
     private final Storage gcsClient;
-    private boolean uploadStarted = false;
     private WriteChannel writer = null;
 
     public GCSWriter(String bucket, String path, Storage gcsClient, IRequestProfiler profiler) {
@@ -88,7 +87,6 @@
         try {
             writer.close();
             writer = null;
-            uploadStarted = false;
         } catch (IOException e) {
             throw HyracksDataException.create(e);
         }
@@ -104,8 +102,7 @@
     }
 
     private void setUploadId() {
-        if (!uploadStarted) {
-            uploadStarted = true;
+        if (writer == null) {
             writer = gcsClient.writer(BlobInfo.newBuilder(BlobId.of(bucket, path)).build());
             writer.setChunkSize(WRITE_BUFFER_SIZE);
             log("STARTED");