diff --git a/block-storage/src/main/java/org/lucares/pdb/blockstorage/intsequence/LongSequenceEncoderDecoder.java b/block-storage/src/main/java/org/lucares/pdb/blockstorage/intsequence/LongSequenceEncoderDecoder.java
index f51243a..b75f285 100644
--- a/block-storage/src/main/java/org/lucares/pdb/blockstorage/intsequence/LongSequenceEncoderDecoder.java
+++ b/block-storage/src/main/java/org/lucares/pdb/blockstorage/intsequence/LongSequenceEncoderDecoder.java
@@ -148,22 +148,4 @@ public class LongSequenceEncoderDecoder {
 			}
 		}
 	}
-
-//	public void encode(final LongList values, final byte[] buffer) {
-//
-//		int offsetInBuffer = 0;
-//
-//		for (int i = 0; i < values.size(); i++) {
-//
-//			final long value = values.get(i);
-//			final int encodedBytes = encodeInto(value, buffer, offsetInBuffer);
-//
-//			if (encodedBytes == 0 || offsetInBuffer >= 509) {
-//				System.out.println("first header block is full");
-//			}
-//
-//			offsetInBuffer += encodedBytes;
-//		}
-//	}
-
 }
diff --git a/block-storage/src/main/java/org/lucares/pdb/diskstorage/DiskBlock.java b/block-storage/src/main/java/org/lucares/pdb/diskstorage/DiskBlock.java
index 35b4653..376ce80 100644
--- a/block-storage/src/main/java/org/lucares/pdb/diskstorage/DiskBlock.java
+++ b/block-storage/src/main/java/org/lucares/pdb/diskstorage/DiskBlock.java
@@ -49,14 +49,6 @@ public class DiskBlock {
 		this.nextBlockNumber = nextBlockNumber;
 	}
 
-//	public void replace(final byte[] serialized) {
-//		if (buffer.length != serialized.length) {
-//			throw new IllegalArgumentException(
-//					"existing buffer has length " + buffer.length + ", but new buffer has length " + serialized.length);
-//		}
-//		buffer = serialized;
-//	}
-
 	private void writeBufferToByteBuffer() {
 		byteBuffer.position(INT_SEQUENCE_OFFSET);
 		byteBuffer.put(buffer);
@@ -111,8 +103,4 @@ public class DiskBlock {
 		final LongList bufferDecoded = new LongSequenceEncoderDecoder().decode(buffer);
 		return "DiskBlock[" + blockNumber + ", bufferDecoded=" + bufferDecoded + "]";
 	}
-//
-//	public void putNoNextBlockNumber() {
-//		nextBlockNumber = NO_NEXT_POINTER;
-//	}
 }