diff --git a/hbs2-storage-ncq/lib/HBS2/Storage/NCQ3/Internal.hs b/hbs2-storage-ncq/lib/HBS2/Storage/NCQ3/Internal.hs
index 353c255b..534b4f22 100644
--- a/hbs2-storage-ncq/lib/HBS2/Storage/NCQ3/Internal.hs
+++ b/hbs2-storage-ncq/lib/HBS2/Storage/NCQ3/Internal.hs
@@ -28,11 +28,12 @@ ncqStorageOpen :: MonadIO m => FilePath -> (NCQStorage -> NCQStorage) -> m NCQSt
 ncqStorageOpen fp upd = do
   let ncqRoot           = fp
   let ncqGen            = 0
-  let ncqFsync          = 16 * megabytes
+  -- let ncqFsync          = 16 * megabytes
+  let ncqFsync          = 32   * megabytes
   let ncqWriteQLen      = 1024 * 4
-  let ncqMinLog         = 2  * gigabytes
-  let ncqMaxLog         = 32 * gigabytes
-  let ncqWriteBlock     = max 128 $ ncqWriteQLen `div` 2
+  let ncqMinLog         = 512  * megabytes
+  let ncqMaxLog         = 32   * gigabytes
+  let ncqWriteBlock     = max 256 $ ncqWriteQLen `div` 2
   let ncqMaxCachedIndex = 64
   let ncqMaxCachedData  = 64
   let ncqIdleThrsh      = 50.0
@@ -117,14 +118,16 @@ ncqPutBlock0 :: MonadUnliftIO m
              -> m (Maybe HashRef)
 ncqPutBlock0 sto lbs wait = do
   ncqLocate sto ohash >>= \case
-    Nothing -> Just <$> work sto (Just B) (Just ohash) bs
-    _       -> pure (Just ohash)
+    Nothing                -> Just <$> work
+    Just l | ncqIsTomb l   -> Just <$> work
+    _                      -> pure (Just ohash)
   where
     bs =  LBS.toStrict lbs
     ohash = HashRef $ hashObject @HbSync bs
 
-    work | wait = ncqPutBS
-         | otherwise = ncqTossBS
+    work | wait      = ncqPutBS sto (Just B) (Just ohash) bs
+         | otherwise = ncqTossBS sto (Just B) (Just ohash) bs
+    {-# INLINE work #-}
 
 {-# INLINE ncqPutBlock0 #-}
 
diff --git a/hbs2-storage-ncq/lib/HBS2/Storage/NCQ3/Internal/Run.hs b/hbs2-storage-ncq/lib/HBS2/Storage/NCQ3/Internal/Run.hs
index c477a538..155e6f88 100644
--- a/hbs2-storage-ncq/lib/HBS2/Storage/NCQ3/Internal/Run.hs
+++ b/hbs2-storage-ncq/lib/HBS2/Storage/NCQ3/Internal/Run.hs
@@ -147,6 +147,7 @@ ncqStorageRun ncq@NCQStorage{..} = flip runContT pure do
 
                   -- ss <- liftIO (PFS.getFdStatus fh) <&> fromIntegral . PFS.fileSize
 
+                  -- atomically $ ncqDeferredWriteOpSTM ncq do
                   ncqStateUpdate ncq do
                     ncqStateAddFact (P (PData (DataFile fk) ss))
 
@@ -168,7 +169,7 @@ ncqStorageRun ncq@NCQStorage{..} = flip runContT pure do
 
     RunWrite (fk, fh, w, total') -> do
 
-      let timeoutMicro = 10_000_000
+      let timeoutMicro = 30_000_000
 
       chunk <- liftIO $ timeout timeoutMicro $ atomically do
         stop  <- readTVar ncqStopReq
diff --git a/hbs2-storage-ncq/lib/HBS2/Storage/NCQ3/Internal/Types.hs b/hbs2-storage-ncq/lib/HBS2/Storage/NCQ3/Internal/Types.hs
index ab200932..5f92d374 100644
--- a/hbs2-storage-ncq/lib/HBS2/Storage/NCQ3/Internal/Types.hs
+++ b/hbs2-storage-ncq/lib/HBS2/Storage/NCQ3/Internal/Types.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE OverloadedLabels #-}
 {-# LANGUAGE UndecidableInstances #-}
 module HBS2.Storage.NCQ3.Internal.Types where
 
@@ -11,6 +10,7 @@ import Data.HashSet qualified as HS
 import Text.Printf
 import Control.Concurrent.STM.TSem (TSem,waitTSem,signalTSem)
 import System.FileLock (FileLock)
+import Data.Vector qualified as V
 
 data CachedData =  CachedData !ByteString
 data CachedIndex = CachedIndex !ByteString !NWayHash
@@ -200,3 +200,8 @@ ncqIsTombEntrySize :: Integral a => a -> Bool
 ncqIsTombEntrySize s = fromIntegral s <= ncqTombEntrySize
 {-# INLINE ncqIsTombEntrySize #-}
 
+ncqDeferredWriteOpSTM :: NCQStorage -> IO () -> STM ()
+ncqDeferredWriteOpSTM NCQStorage{..} work = do
+    nw <- readTVar ncqWrites <&> (`mod` V.length ncqWriteOps)
+    writeTQueue (ncqWriteOps ! nw) work
+
diff --git a/hbs2-tests/test/NCQ3.hs b/hbs2-tests/test/NCQ3.hs
index d0341e32..a7c71cb6 100644
--- a/hbs2-tests/test/NCQ3.hs
+++ b/hbs2-tests/test/NCQ3.hs
@@ -606,6 +606,7 @@ ncq3Tests = do
 
       chu <- S.toList_ (readChunkedBS lbs (256*1024))
       hashes <- forConcurrently chu $ \chunk -> do
+        -- ncqPutBS ncq (Just B) Nothing (LBS.toStrict chunk)
         ncqTossBlock ncq chunk >>= orThrowUser "can't save"
 
       none