Index: gui/services/models.py
===================================================================
--- gui/services/models.py      (revision 9434)
+++ gui/services/models.py      (working copy)
@@ -156,21 +156,21 @@
             help_text=_("These extensions enable Samba to better serve UNIX CIFS clients by supporting features such as symbolic links, hard links, etc..."),
             )
     cifs_srv_aio_enable = models.BooleanField(
-            default=True,
+            default=False,
             verbose_name=_("Enable AIO"),
             help_text=_("Enable/disable AIO support.")
             )
     cifs_srv_aio_rs = models.IntegerField(
             max_length=120,
             verbose_name=_("Minimum AIO read size"),
-            help_text=_("Samba will read asynchronously if request size is larger than this value. The default read size is 1."),
-            default = 1,
+            help_text=_("Samba will read asynchronously if request size is larger than this value."),
+            default=4096,
             )
     cifs_srv_aio_ws = models.IntegerField(
             max_length=120,
             verbose_name=_("Minimum AIO write size"),
-            help_text=_("Samba will write asynchronously if request size is larger than this value. The default write size is 1."),
-            default = 1,
+            help_text=_("Samba will write asynchronously if request size is larger than this value."),
+            default=4096,
             )
     cifs_srv_zeroconf = models.BooleanField(
             verbose_name=_("Zeroconf share discovery"),
Index: gui/services/migrations/0002_auto__add_field_cifs_cifs_srv_homedir_enable__add_field_cifs_cifs_srv_.py
===================================================================
--- gui/services/migrations/0002_auto__add_field_cifs_cifs_srv_homedir_enable__add_field_cifs_cifs_srv_.py      (revision 9434)
+++ gui/services/migrations/0002_auto__add_field_cifs_cifs_srv_homedir_enable__add_field_cifs_cifs_srv_.py      (working copy)
@@ -12,13 +12,13 @@
         db.add_column('services_cifs', 'cifs_srv_homedir_enable', self.gf('django.db.models.fields.BooleanField')(default=0), keep_default=False)

         # Adding field 'CIFS.cifs_srv_aio_enable'
-        db.add_column('services_cifs', 'cifs_srv_aio_enable', self.gf('django.db.models.fields.BooleanField')(default=1), keep_default=False)
+        db.add_column('services_cifs', 'cifs_srv_aio_enable', self.gf('django.db.models.fields.BooleanField')(default=0), keep_default=False)

         # Adding field 'CIFS.cifs_srv_aio_rs'
-        db.add_column('services_cifs', 'cifs_srv_aio_rs', self.gf('django.db.models.fields.IntegerField')(default='1', max_length=120), keep_default=False)
+        db.add_column('services_cifs', 'cifs_srv_aio_rs', self.gf('django.db.models.fields.IntegerField')(default='4096', max_length=120), keep_default=False)

         # Adding field 'CIFS.cifs_srv_aio_ws'
-        db.add_column('services_cifs', 'cifs_srv_aio_ws', self.gf('django.db.models.fields.IntegerField')(default='1', max_length=120), keep_default=False)
+        db.add_column('services_cifs', 'cifs_srv_aio_ws', self.gf('django.db.models.fields.IntegerField')(default='4096', max_length=120), keep_default=False)


     def backwards(self, orm):