diff --git a/retrieval/miner.go b/retrieval/miner.go
index c8d8a2ccf..1555836ef 100644
--- a/retrieval/miner.go
+++ b/retrieval/miner.go
@@ -31,17 +31,25 @@ func NewMiner(sblks *sectorblocks.SectorBlocks) *Miner {
 	}
 }
 
+func writeErr(stream network.Stream, err error) {
+	log.Errorf("Retrieval deal error: %s", err)
+	_ = cborrpc.WriteCborRPC(stream, DealResponse{
+		Status:  Error,
+		Message: err.Error(),
+	})
+}
+
 func (m *Miner) HandleQueryStream(stream network.Stream) {
 	defer stream.Close()
 
 	var query Query
 	if err := cborrpc.ReadCborRPC(stream, &query); err != nil {
-		log.Errorf("Retrieval query: ReadCborRPC: %s", err)
+		writeErr(stream, err)
 		return
 	}
 
-	refs, err := m.sectorBlocks.GetRefs(query.Piece)
-	if err != nil {
+	size, err := m.sectorBlocks.GetSize(query.Piece)
+	if err != nil && err != sectorblocks.ErrNotFound {
 		log.Errorf("Retrieval query: GetRefs: %s", err)
 		return
 	}
@@ -49,12 +57,12 @@ func (m *Miner) HandleQueryStream(stream network.Stream) {
 	answer := QueryResponse{
 		Status: Unavailable,
 	}
-	if len(refs) > 0 {
+	if err == nil {
 		answer.Status = Available
 
 		// TODO: get price, look for already unsealed ref to reduce work
-		answer.MinPrice = types.BigMul(types.NewInt(uint64(refs[0].Size)), m.pricePerByte)
-		answer.Size = uint64(refs[0].Size) // TODO: verify on intermediate
+		answer.MinPrice = types.BigMul(types.NewInt(uint64(size)), m.pricePerByte)
+		answer.Size = uint64(size) // TODO: verify on intermediate
 	}
 
 	if err := cborrpc.WriteCborRPC(stream, answer); err != nil {
@@ -63,14 +71,6 @@ func (m *Miner) HandleQueryStream(stream network.Stream) {
 	}
 }
 
-func writeErr(stream network.Stream, err error) {
-	log.Errorf("Retrieval deal error: %s", err)
-	_ = cborrpc.WriteCborRPC(stream, DealResponse{
-		Status:  Error,
-		Message: err.Error(),
-	})
-}
-
 func (m *Miner) HandleDealStream(stream network.Stream) { // TODO: should we block in stream handlers
 	defer stream.Close()
 
diff --git a/storage/sectorblocks/blocks.go b/storage/sectorblocks/blocks.go
index cebb8132c..90d691660 100644
--- a/storage/sectorblocks/blocks.go
+++ b/storage/sectorblocks/blocks.go
@@ -2,6 +2,7 @@ package sectorblocks
 
 import (
 	"context"
+	"errors"
 	"github.com/filecoin-project/go-lotus/api"
 	"github.com/filecoin-project/go-lotus/lib/sectorbuilder"
 	"github.com/filecoin-project/go-lotus/node/modules/dtypes"
@@ -9,6 +10,7 @@ import (
 	"github.com/ipfs/go-datastore/query"
 	blockstore "github.com/ipfs/go-ipfs-blockstore"
 	ipld "github.com/ipfs/go-ipld-format"
+	"github.com/ipfs/go-unixfs"
 	"sync"
 
 	"github.com/ipfs/go-cid"
@@ -29,6 +31,8 @@ const (
 var dsPrefix = datastore.NewKey("/sealedblocks")
 var imBlocksPrefix = datastore.NewKey("/intermediate")
 
+var ErrNotFound = errors.New("not found")
+
 type SectorBlocks struct {
 	*sector.Store
 
@@ -69,14 +73,14 @@ type UnixfsReader interface {
 
 type refStorer struct {
 	blockReader  UnixfsReader
-	writeRef     func(cid cid.Cid, offset uint64, size uint32) error
+	writeRef     func(cid cid.Cid, pieceRef string, offset uint64, size uint32) error
 	intermediate blockstore.Blockstore
 
 	pieceRef  string
 	remaining []byte
 }
 
-func (st *SectorBlocks) writeRef(cid cid.Cid, offset uint64, size uint32) error {
+func (st *SectorBlocks) writeRef(cid cid.Cid, pieceRef string, offset uint64, size uint32) error {
 	st.keyLk.Lock() // TODO: make this multithreaded
 	defer st.keyLk.Unlock()
 
@@ -96,7 +100,7 @@ func (st *SectorBlocks) writeRef(cid cid.Cid, offset uint64, size uint32) error
 	}
 
 	refs = append(refs, api.SealedRef{
-		Piece:  string(SerializationUnixfs0) + cid.String(),
+		Piece:  pieceRef,
 		Offset: offset,
 		Size:   size,
 	})
@@ -136,7 +140,7 @@ func (r *refStorer) Read(p []byte) (n int, err error) {
 			continue
 		}
 
-		if err := r.writeRef(nd.Cid(), offset, uint32(len(data))); err != nil {
+		if err := r.writeRef(nd.Cid(), r.pieceRef, offset, uint32(len(data))); err != nil {
 			return 0, err
 		}
 
@@ -196,6 +200,9 @@ func (st *SectorBlocks) List() (map[cid.Cid][]api.SealedRef, error) {
 
 func (st *SectorBlocks) GetRefs(k cid.Cid) ([]api.SealedRef, error) { // TODO: track local sectors
 	ent, err := st.keys.Get(dshelp.CidToDsKey(k))
+	if err == datastore.ErrNotFound {
+		err = ErrNotFound
+	}
 	if err != nil {
 		return nil, err
 	}
@@ -208,6 +215,33 @@ func (st *SectorBlocks) GetRefs(k cid.Cid) ([]api.SealedRef, error) { // TODO: t
 	return refs, nil
 }
 
+func (st *SectorBlocks) GetSize(k cid.Cid) (uint64, error) {
+	blk, err := st.intermediate.Get(k)
+	if err == blockstore.ErrNotFound {
+		refs, err := st.GetRefs(k)
+		if err != nil {
+			return 0, err
+		}
+
+		return uint64(refs[0].Size), nil
+	}
+	if err != nil {
+		return 0, err
+	}
+
+	nd, err := ipld.Decode(blk)
+	if err != nil {
+		return 0, err
+	}
+
+	fsn, err := unixfs.ExtractFSNode(nd)
+	if err != nil {
+		return 0, err
+	}
+
+	return fsn.FileSize(), nil
+}
+
 func (st *SectorBlocks) Has(k cid.Cid) (bool, error) {
 	// TODO: ensure sector is still there
 	return st.keys.Has(dshelp.CidToDsKey(k))
diff --git a/storage/sectorblocks/unsealed.go b/storage/sectorblocks/unsealed.go
index d211910d3..d532b82ab 100644
--- a/storage/sectorblocks/unsealed.go
+++ b/storage/sectorblocks/unsealed.go
@@ -85,11 +85,14 @@ func (ub *unsealedBlocks) maybeUnseal(ctx context.Context, pieceKey string, appr
 
 	log.Infof("Unsealing piece '%s'", pieceKey)
 	data, err := ub.sb.ReadPieceFromSealedSector(pieceKey)
+	ub.lk.Lock()
+
 	if err != nil {
+		// TODO: tell subs
+		log.Error(err)
 		return nil, err
 	}
 
-	ub.lk.Lock()
 	ub.unsealed[pieceKey] = data
 	close(ub.unsealing[pieceKey])
 	return data, nil