diff --git a/internal/storagenode/client/log_client.go b/internal/storagenode/client/log_client.go
index 1ac3abe58..331165c6d 100644
--- a/internal/storagenode/client/log_client.go
+++ b/internal/storagenode/client/log_client.go
@@ -41,12 +41,11 @@ func (c *LogClient) reset(rpcConn *rpc.Conn, _ types.ClusterID, target varlogpb.
 // Append stores data to the log stream specified with the topicID and the logStreamID.
 // The backup indicates the storage nodes that have backup replicas of that log stream.
 // It returns valid GLSN if the append completes successfully.
-func (c *LogClient) Append(ctx context.Context, tpid types.TopicID, lsid types.LogStreamID, data [][]byte, backups ...varlogpb.StorageNode) ([]snpb.AppendResult, error) {
+func (c *LogClient) Append(ctx context.Context, tpid types.TopicID, lsid types.LogStreamID, data [][]byte) ([]snpb.AppendResult, error) {
 	req := &snpb.AppendRequest{
 		TopicID:     tpid,
 		LogStreamID: lsid,
 		Payload:     data,
-		Backups:     backups,
 	}
 	rsp, err := c.rpcClient.Append(ctx, req)
 	if err != nil {
diff --git a/internal/storagenode/testing.go b/internal/storagenode/testing.go
index 693315e58..2187cf7e7 100644
--- a/internal/storagenode/testing.go
+++ b/internal/storagenode/testing.go
@@ -132,14 +132,7 @@ func TestAppend(t *testing.T, tpid types.TopicID, lsid types.LogStreamID, dataBa
 	lc, closer := TestNewLogIOClient(t, replicas[0].StorageNodeID, replicas[0].Address)
 	defer closer()
 
-	var backups []varlogpb.StorageNode
-	for _, replica := range replicas[1:] {
-		backups = append(backups, varlogpb.StorageNode{
-			StorageNodeID: replica.StorageNodeID,
-			Address:       replica.Address,
-		})
-	}
-	res, err := lc.Append(context.Background(), tpid, lsid, dataBatch, backups...)
+	res, err := lc.Append(context.Background(), tpid, lsid, dataBatch)
 	assert.NoError(t, err)
 	return res
 }
diff --git a/pkg/varlog/operations.go b/pkg/varlog/operations.go
index 01b7fa580..5e41f939a 100644
--- a/pkg/varlog/operations.go
+++ b/pkg/varlog/operations.go
@@ -102,13 +102,7 @@ func (v *logImpl) appendTo(ctx context.Context, tpid types.TopicID, lsid types.L
 		return nil, fmt.Errorf("append: %w", err)
 	}
 
-	backup := make([]varlogpb.StorageNode, len(replicas)-1)
-	for i := 0; i < len(replicas)-1; i++ {
-		backup[i].StorageNodeID = replicas[i+1].StorageNodeID
-		backup[i].Address = replicas[i+1].Address
-	}
-
-	res, err := cl.Append(ctx, tpid, lsid, data, backup...)
+	res, err := cl.Append(ctx, tpid, lsid, data)
 	if err != nil {
 		if strings.Contains(err.Error(), "sealed") {
 			err = fmt.Errorf("append: %s: %w", err.Error(), verrors.ErrSealed)
diff --git a/proto/snpb/log_io.pb.go b/proto/snpb/log_io.pb.go
index 4f14a1866..f8d4382de 100644
--- a/proto/snpb/log_io.pb.go
+++ b/proto/snpb/log_io.pb.go
@@ -38,7 +38,6 @@ type AppendRequest struct {
 	TopicID     github_com_kakao_varlog_pkg_types.TopicID     `protobuf:"varint,1,opt,name=topic_id,json=topicId,proto3,casttype=github.com/kakao/varlog/pkg/types.TopicID" json:"topic_id,omitempty"`
 	LogStreamID github_com_kakao_varlog_pkg_types.LogStreamID `protobuf:"varint,2,opt,name=log_stream_id,json=logStreamId,proto3,casttype=github.com/kakao/varlog/pkg/types.LogStreamID" json:"log_stream_id,omitempty"`
 	Payload     [][]byte                                      `protobuf:"bytes,3,rep,name=payload,proto3" json:"payload,omitempty"`
-	Backups     []varlogpb.StorageNode                        `protobuf:"bytes,4,rep,name=backups,proto3" json:"backups"`
 }
 
 func (m *AppendRequest) Reset()         { *m = AppendRequest{} }
@@ -95,13 +94,6 @@ func (m *AppendRequest) GetPayload() [][]byte {
 	return nil
 }
 
-func (m *AppendRequest) GetBackups() []varlogpb.StorageNode {
-	if m != nil {
-		return m.Backups
-	}
-	return nil
-}
-
 type AppendResult struct {
 	Meta  varlogpb.LogEntryMeta `protobuf:"bytes,1,opt,name=meta,proto3" json:"meta"`
 	Error string                `protobuf:"bytes,2,opt,name=error,proto3" json:"error,omitempty"`
@@ -832,66 +824,64 @@ func init() {
 func init() { proto.RegisterFile("proto/snpb/log_io.proto", fileDescriptor_7692726f23e518ee) }
 
 var fileDescriptor_7692726f23e518ee = []byte{
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+	0xf7, 0x59, 0x89, 0x99, 0x59, 0xcf, 0x77, 0x36, 0xc0, 0xac, 0x32, 0x98, 0x9e, 0xef, 0x14, 0x44,
+	0x53, 0xd9, 0x9a, 0x68, 0xe4, 0x6d, 0x88, 0xe6, 0x37, 0x09, 0x5e, 0xcb, 0x31, 0x7f, 0xe5, 0x94,
+	0xf3, 0x4f, 0x19, 0x50, 0x16, 0xff, 0x90, 0x5e, 0x83, 0xfe, 0xfc, 0x04, 0x80, 0x2c, 0x65, 0x5f,
+	0x59, 0xca, 0xbe, 0xbf, 0x99, 0xec, 0x39, 0x7d, 0x35, 0x92, 0x97, 0x3d, 0x49, 0x65, 0x2f, 0x2f,
+	0x65, 0xdf, 0xdf, 0x44, 0xf6, 0x1c, 0xb3, 0x4a, 0x12, 0xd9, 0x6b, 0x03, 0xd8, 0x2f, 0x50, 0x2f,
+	0xc4, 0xf3, 0x10, 0x6a, 0x8c, 0x26, 0xcc, 0x9e, 0x06, 0xf1, 0x76, 0x34, 0xd7, 0xbe, 0x1d, 0xa2,
+	0xaf, 0xef, 0x12, 0xb1, 0xd6, 0x7e, 0x91, 0xe0, 0xce, 0x30, 0xf4, 0xc6, 0x47, 0x38, 0x08, 0xf1,
+	0xc8, 0x8a, 0xf1, 0x76, 0xdf, 0xdc, 0x54, 0xe9, 0xe5, 0xff, 0xa7, 0x74, 0xed, 0x77, 0x09, 0x1a,
+	0x59, 0x49, 0x1f, 0x8b, 0xf1, 0xe1, 0xea, 0xab, 0x51, 0xfb, 0x11, 0x9a, 0x2b, 0xd2, 0x12, 0x95,
+	0xfe, 0x06, 0xee, 0xe4, 0x42, 0x70, 0x30, 0x93, 0x42, 0x10, 0xd3, 0x50, 0x54, 0xfd, 0xcd, 0x55,
+	0x55, 0x4f, 0xa0, 0x8e, 0x32, 0x5b, 0x21, 0x80, 0x7d, 0xf2, 0xf2, 0x91, 0xf6, 0xa7, 0x04, 0x6a,
+	0xe6, 0x62, 0xe2, 0x80, 0x78, 0x23, 0xeb, 0x1a, 0x71, 0xfb, 0x93, 0x04, 0xed, 0xf5, 0xe9, 0x09,
+	0x8e, 0x47, 0x80, 0x72, 0xa1, 0x84, 0x89, 0x95, 0x20, 0xd8, 0x28, 0x8c, 0x4b, 0xeb, 0xa0, 0x5e,
+	0xe2, 0xfa, 0x36, 0x39, 0x67, 0xd9, 0xf9, 0xb7, 0x02, 0x3b, 0x7d, 0xea, 0x1e, 0x7f, 0x81, 0x3e,
+	0x85, 0x1b, 0xc9, 0xd8, 0x85, 0x94, 0x95, 0xb3, 0x18, 0x27, 0x5d, 0xb9, 0xb7, 0x7a, 0x4e, 0xe3,
+	0x11, 0x6b, 0x25, 0xf4, 0x11, 0xc8, 0x6c, 0x10, 0x41, 0x8d, 0x82, 0x59, 0x6e, 0x5c, 0x53, 0x9a,
+	0x2b, 0x4e, 0x32, 0xf7, 0x13, 0xa8, 0x65, 0x7d, 0x05, 0xdd, 0x2f, 0x58, 0x9e, 0x1f, 0x12, 0x94,
+	0xd6, 0xba, 0xe3, 0x14, 0xed, 0x5d, 0x09, 0x0d, 0xa1, 0x9e, 0xeb, 0x53, 0x48, 0x5d, 0xed, 0x92,
+	0x3d, 0x1e, 0x4a, 0x7b, 0xbd, 0x41, 0x0e, 0xf5, 0x04, 0x6e, 0x15, 0xfb, 0x14, 0xd2, 0x0a, 0x7e,
+	0x2b, 0x9b, 0x98, 0xf2, 0x86, 0x9e, 0xfc, 0x96, 0xe8, 0xe9, 0x6f, 0x89, 0xde, 0x63, 0xbf, 0x25,
+	0x5a, 0x09, 0x4d, 0x73, 0x0d, 0xe4, 0x5c, 0x05, 0xd1, 0x3b, 0x97, 0x2a, 0x74, 0x7a, 0xc7, 0xe1,
+	0x25, 0xad, 0xd3, 0x64, 0xba, 0x0f, 0x9f, 0xcd, 0x5b, 0xd2, 0xf3, 0x79, 0x4b, 0x7a, 0xba, 0x68,
+	0x95, 0x7e, 0x5e, 0xb4, 0xa4, 0xe7, 0x8b, 0x56, 0xe9, 0x8f, 0x45, 0xab, 0xf4, 0x95, 0xb6, 0x56,
+	0xde, 0xd9, 0x1f, 0x9b, 0x7d, 0x83, 0x7f, 0xbf, 0xf7, 0x5f, 0x00, 0x00, 0x00, 0xff, 0xff, 0xb7,
+	0xee, 0x16, 0xb1, 0xc6, 0x0d, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -1299,20 +1289,6 @@ func (m *AppendRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
-	if len(m.Backups) > 0 {
-		for iNdEx := len(m.Backups) - 1; iNdEx >= 0; iNdEx-- {
-			{
-				size, err := m.Backups[iNdEx].MarshalToSizedBuffer(dAtA[:i])
-				if err != nil {
-					return 0, err
-				}
-				i -= size
-				i = encodeVarintLogIo(dAtA, i, uint64(size))
-			}
-			i--
-			dAtA[i] = 0x22
-		}
-	}
 	if len(m.Payload) > 0 {
 		for iNdEx := len(m.Payload) - 1; iNdEx >= 0; iNdEx-- {
 			i -= len(m.Payload[iNdEx])
@@ -1843,12 +1819,6 @@ func (m *AppendRequest) ProtoSize() (n int) {
 			n += 1 + l + sovLogIo(uint64(l))
 		}
 	}
-	if len(m.Backups) > 0 {
-		for _, e := range m.Backups {
-			l = e.ProtoSize()
-			n += 1 + l + sovLogIo(uint64(l))
-		}
-	}
 	return n
 }
 
@@ -2163,40 +2133,6 @@ func (m *AppendRequest) Unmarshal(dAtA []byte) error {
 			m.Payload = append(m.Payload, make([]byte, postIndex-iNdEx))
 			copy(m.Payload[len(m.Payload)-1], dAtA[iNdEx:postIndex])
 			iNdEx = postIndex
-		case 4:
-			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Backups", wireType)
-			}
-			var msglen int
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowLogIo
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				msglen |= int(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			if msglen < 0 {
-				return ErrInvalidLengthLogIo
-			}
-			postIndex := iNdEx + msglen
-			if postIndex < 0 {
-				return ErrInvalidLengthLogIo
-			}
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.Backups = append(m.Backups, varlogpb.StorageNode{})
-			if err := m.Backups[len(m.Backups)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
-				return err
-			}
-			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipLogIo(dAtA[iNdEx:])
diff --git a/proto/snpb/log_io.proto b/proto/snpb/log_io.proto
index 29b3bf551..e0efad5c1 100644
--- a/proto/snpb/log_io.proto
+++ b/proto/snpb/log_io.proto
@@ -29,7 +29,6 @@ message AppendRequest {
     (gogoproto.customname) = "LogStreamID"
   ];
   repeated bytes payload = 3;
-  repeated varlogpb.StorageNode backups = 4 [(gogoproto.nullable) = false];
 }
 
 message AppendResult {