diff --git a/extern/sector-storage/cbor_gen.go b/extern/sector-storage/cbor_gen.go
index 7ec29c795..a291487f0 100644
--- a/extern/sector-storage/cbor_gen.go
+++ b/extern/sector-storage/cbor_gen.go
@@ -17,12 +17,51 @@ func (t *Call) MarshalCBOR(w io.Writer) error {
 		_, err := w.Write(cbg.CborNull)
 		return err
 	}
-	if _, err := w.Write([]byte{162}); err != nil {
+	if _, err := w.Write([]byte{164}); err != nil {
 		return err
 	}
 
 	scratch := make([]byte, 9)
 
+	// t.ID (storiface.CallID) (struct)
+	if len("ID") > cbg.MaxLength {
+		return xerrors.Errorf("Value in field \"ID\" was too long")
+	}
+
+	if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajTextString, uint64(len("ID"))); err != nil {
+		return err
+	}
+	if _, err := io.WriteString(w, string("ID")); err != nil {
+		return err
+	}
+
+	if err := t.ID.MarshalCBOR(w); err != nil {
+		return err
+	}
+
+	// t.RetType (sectorstorage.ReturnType) (string)
+	if len("RetType") > cbg.MaxLength {
+		return xerrors.Errorf("Value in field \"RetType\" was too long")
+	}
+
+	if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajTextString, uint64(len("RetType"))); err != nil {
+		return err
+	}
+	if _, err := io.WriteString(w, string("RetType")); err != nil {
+		return err
+	}
+
+	if len(t.RetType) > cbg.MaxLength {
+		return xerrors.Errorf("Value in field t.RetType was too long")
+	}
+
+	if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajTextString, uint64(len(t.RetType))); err != nil {
+		return err
+	}
+	if _, err := io.WriteString(w, string(t.RetType)); err != nil {
+		return err
+	}
+
 	// t.State (sectorstorage.CallState) (uint64)
 	if len("State") > cbg.MaxLength {
 		return xerrors.Errorf("Value in field \"State\" was too long")
@@ -98,7 +137,28 @@ func (t *Call) UnmarshalCBOR(r io.Reader) error {
 		}
 
 		switch name {
-		// t.State (sectorstorage.CallState) (uint64)
+		// t.ID (storiface.CallID) (struct)
+		case "ID":
+
+			{
+
+				if err := t.ID.UnmarshalCBOR(br); err != nil {
+					return xerrors.Errorf("unmarshaling t.ID: %w", err)
+				}
+
+			}
+			// t.RetType (sectorstorage.ReturnType) (string)
+		case "RetType":
+
+			{
+				sval, err := cbg.ReadStringBuf(br, scratch)
+				if err != nil {
+					return err
+				}
+
+				t.RetType = ReturnType(sval)
+			}
+			// t.State (sectorstorage.CallState) (uint64)
 		case "State":
 
 			{
diff --git a/extern/sector-storage/manager_test.go b/extern/sector-storage/manager_test.go
index 8ddfd822e..9a47c3b55 100644
--- a/extern/sector-storage/manager_test.go
+++ b/extern/sector-storage/manager_test.go
@@ -11,6 +11,7 @@ import (
 	"strings"
 	"sync"
 	"testing"
+	"time"
 
 	"github.com/google/uuid"
 	"github.com/ipfs/go-datastore"
@@ -203,6 +204,7 @@ func TestRedoPC1(t *testing.T) {
 	require.Equal(t, 2, tw.pc1s)
 }
 
+// Manager restarts in the middle of a task, restarts it, it completes
 func TestRestartManager(t *testing.T) {
 	logging.SetAllLoggers(logging.LevelDebug)
 
@@ -262,6 +264,8 @@ func TestRestartManager(t *testing.T) {
 
 	m, lstor, _, _ = newTestMgr(ctx, t, ds)
 	tw.ret = m // simulate jsonrpc auto-reconnect
+	err = m.AddWorker(ctx, tw)
+	require.NoError(t, err)
 
 	tw.pc1lk.Unlock()
 
@@ -270,3 +274,68 @@ func TestRestartManager(t *testing.T) {
 
 	require.Equal(t, 1, tw.pc1s)
 }
+
+// Worker restarts in the middle of a task, task fails after restart
+func TestRestartWorker(t *testing.T) {
+	logging.SetAllLoggers(logging.LevelDebug)
+
+	ctx, done := context.WithCancel(context.Background())
+	defer done()
+
+	ds := datastore.NewMapDatastore()
+
+	m, lstor, stor, idx := newTestMgr(ctx, t, ds)
+
+	localTasks := []sealtasks.TaskType{
+		sealtasks.TTAddPiece, sealtasks.TTPreCommit1, sealtasks.TTCommit1, sealtasks.TTFinalize, sealtasks.TTFetch,
+	}
+
+	wds := datastore.NewMapDatastore()
+
+	arch := make(chan chan apres)
+	w := newLocalWorker(func() (ffiwrapper.Storage, error) {
+		return &testExec{apch: arch}, nil
+	}, WorkerConfig{
+		SealProof: 0,
+		TaskTypes: localTasks,
+	}, stor, lstor, idx, m, statestore.New(wds))
+
+	err := m.AddWorker(ctx, w)
+	require.NoError(t, err)
+
+	sid := abi.SectorID{Miner: 1000, Number: 1}
+
+	apDone := make(chan struct{})
+
+	go func() {
+		defer close(apDone)
+
+		_, err := m.AddPiece(ctx, sid, nil, 1016, strings.NewReader(strings.Repeat("testthis", 127)))
+		require.Error(t, err)
+	}()
+
+	// kill the worker
+	<-arch
+	require.NoError(t, w.Close())
+
+	for {
+		if len(m.WorkerStats()) == 0 {
+			break
+		}
+
+		time.Sleep(time.Millisecond * 3)
+	}
+
+	// restart the worker
+	w = newLocalWorker(func() (ffiwrapper.Storage, error) {
+		return &testExec{apch: arch}, nil
+	}, WorkerConfig{
+		SealProof: 0,
+		TaskTypes: localTasks,
+	}, stor, lstor, idx, m, statestore.New(wds))
+
+	err = m.AddWorker(ctx, w)
+	require.NoError(t, err)
+
+	<-apDone
+}
diff --git a/extern/sector-storage/teststorage_test.go b/extern/sector-storage/teststorage_test.go
new file mode 100644
index 000000000..da575a491
--- /dev/null
+++ b/extern/sector-storage/teststorage_test.go
@@ -0,0 +1,81 @@
+package sectorstorage
+
+import (
+	"context"
+	"io"
+
+	"github.com/ipfs/go-cid"
+
+	"github.com/filecoin-project/go-state-types/abi"
+	"github.com/filecoin-project/specs-actors/actors/runtime/proof"
+	"github.com/filecoin-project/specs-storage/storage"
+
+	"github.com/filecoin-project/lotus/extern/sector-storage/ffiwrapper"
+	"github.com/filecoin-project/lotus/extern/sector-storage/storiface"
+)
+
+type apres struct {
+	pi abi.PieceInfo
+	err error
+}
+
+type testExec struct {
+	apch chan chan apres
+}
+
+func (t *testExec) GenerateWinningPoSt(ctx context.Context, minerID abi.ActorID, sectorInfo []proof.SectorInfo, randomness abi.PoStRandomness) ([]proof.PoStProof, error) {
+	panic("implement me")
+}
+
+func (t *testExec) GenerateWindowPoSt(ctx context.Context, minerID abi.ActorID, sectorInfo []proof.SectorInfo, randomness abi.PoStRandomness) (proof []proof.PoStProof, skipped []abi.SectorID, err error) {
+	panic("implement me")
+}
+
+func (t *testExec) SealPreCommit1(ctx context.Context, sector abi.SectorID, ticket abi.SealRandomness, pieces []abi.PieceInfo) (storage.PreCommit1Out, error) {
+	panic("implement me")
+}
+
+func (t *testExec) SealPreCommit2(ctx context.Context, sector abi.SectorID, pc1o storage.PreCommit1Out) (storage.SectorCids, error) {
+	panic("implement me")
+}
+
+func (t *testExec) SealCommit1(ctx context.Context, sector abi.SectorID, ticket abi.SealRandomness, seed abi.InteractiveSealRandomness, pieces []abi.PieceInfo, cids storage.SectorCids) (storage.Commit1Out, error) {
+	panic("implement me")
+}
+
+func (t *testExec) SealCommit2(ctx context.Context, sector abi.SectorID, c1o storage.Commit1Out) (storage.Proof, error) {
+	panic("implement me")
+}
+
+func (t *testExec) FinalizeSector(ctx context.Context, sector abi.SectorID, keepUnsealed []storage.Range) error {
+	panic("implement me")
+}
+
+func (t *testExec) ReleaseUnsealed(ctx context.Context, sector abi.SectorID, safeToFree []storage.Range) error {
+	panic("implement me")
+}
+
+func (t *testExec) Remove(ctx context.Context, sector abi.SectorID) error {
+	panic("implement me")
+}
+
+func (t *testExec) NewSector(ctx context.Context, sector abi.SectorID) error {
+	panic("implement me")
+}
+
+func (t *testExec) AddPiece(ctx context.Context, sector abi.SectorID, pieceSizes []abi.UnpaddedPieceSize, newPieceSize abi.UnpaddedPieceSize, pieceData storage.Data) (abi.PieceInfo, error) {
+	resp := make(chan apres)
+	t.apch <- resp
+	ar := <-resp
+	return ar.pi, ar.err
+}
+
+func (t *testExec) UnsealPiece(ctx context.Context, sector abi.SectorID, offset storiface.UnpaddedByteIndex, size abi.UnpaddedPieceSize, randomness abi.SealRandomness, commd cid.Cid) error {
+	panic("implement me")
+}
+
+func (t *testExec) ReadPiece(ctx context.Context, writer io.Writer, sector abi.SectorID, offset storiface.UnpaddedByteIndex, size abi.UnpaddedPieceSize) (bool, error) {
+	panic("implement me")
+}
+
+var _ ffiwrapper.Storage = &testExec{}
\ No newline at end of file
diff --git a/extern/sector-storage/worker_calltracker.go b/extern/sector-storage/worker_calltracker.go
index a16ee33be..38fb39ee1 100644
--- a/extern/sector-storage/worker_calltracker.go
+++ b/extern/sector-storage/worker_calltracker.go
@@ -19,13 +19,18 @@ const (
 )
 
 type Call struct {
+	ID      storiface.CallID
+	RetType ReturnType
+
 	State CallState
 
 	Result []byte // json bytes
 }
 
-func (wt *workerCallTracker) onStart(ci storiface.CallID) error {
+func (wt *workerCallTracker) onStart(ci storiface.CallID, rt ReturnType) error {
 	return wt.st.Begin(ci, &Call{
+		ID: ci,
+		RetType:rt,
 		State: CallStarted,
 	})
 }
@@ -43,3 +48,8 @@ func (wt *workerCallTracker) onReturned(ci storiface.CallID) error {
 	st := wt.st.Get(ci)
 	return st.End()
 }
+
+func (wt *workerCallTracker) unfinished() ([]Call, error) {
+	var out []Call
+	return out, wt.st.List(&out)
+}
diff --git a/extern/sector-storage/worker_local.go b/extern/sector-storage/worker_local.go
index 210ea340c..009e11921 100644
--- a/extern/sector-storage/worker_local.go
+++ b/extern/sector-storage/worker_local.go
@@ -38,18 +38,21 @@ type LocalWorker struct {
 	localStore *stores.Local
 	sindex     stores.SectorIndex
 	ret        storiface.WorkerReturn
+	executor   func() (ffiwrapper.Storage, error)
 
 	ct          *workerCallTracker
 	acceptTasks map[sealtasks.TaskType]struct{}
+
+	closing chan struct{}
 }
 
-func NewLocalWorker(wcfg WorkerConfig, store stores.Store, local *stores.Local, sindex stores.SectorIndex, ret storiface.WorkerReturn, cst *statestore.StateStore) *LocalWorker {
+func newLocalWorker(executor func() (ffiwrapper.Storage, error), wcfg WorkerConfig, store stores.Store, local *stores.Local, sindex stores.SectorIndex, ret storiface.WorkerReturn, cst *statestore.StateStore) *LocalWorker {
 	acceptTasks := map[sealtasks.TaskType]struct{}{}
 	for _, taskType := range wcfg.TaskTypes {
 		acceptTasks[taskType] = struct{}{}
 	}
 
-	return &LocalWorker{
+	w := &LocalWorker{
 		scfg: &ffiwrapper.Config{
 			SealProofType: wcfg.SealProof,
 		},
@@ -62,7 +65,37 @@ func NewLocalWorker(wcfg WorkerConfig, store stores.Store, local *stores.Local,
 			st: cst,
 		},
 		acceptTasks: acceptTasks,
+		executor: executor,
+
+		closing: make(chan struct{}),
 	}
+
+	if w.executor == nil {
+		w.executor = w.ffiExec
+	}
+
+	unfinished, err := w.ct.unfinished()
+	if err != nil {
+		log.Errorf("reading unfinished tasks: %+v", err)
+		return w
+	}
+
+	go func() {
+		for _, call := range unfinished {
+			err := xerrors.Errorf("worker restarted")
+
+			if err := returnFunc[call.RetType](context.TODO(), call.ID, ret, nil, err); err != nil {
+				log.Errorf("return error: %s: %+v", call.RetType, err)
+			}
+		}
+	}()
+
+
+	return w
+}
+
+func NewLocalWorker(wcfg WorkerConfig, store stores.Store, local *stores.Local, sindex stores.SectorIndex, ret storiface.WorkerReturn, cst *statestore.StateStore) *LocalWorker {
+	return newLocalWorker(nil, wcfg, store, local, sindex, ret, cst)
 }
 
 type localWorkerPathProvider struct {
@@ -101,11 +134,11 @@ func (l *localWorkerPathProvider) AcquireSector(ctx context.Context, sector abi.
 	}, nil
 }
 
-func (l *LocalWorker) sb() (ffiwrapper.Storage, error) {
+func (l *LocalWorker) ffiExec() (ffiwrapper.Storage, error) {
 	return ffiwrapper.New(&localWorkerPathProvider{w: l}, l.scfg)
 }
 
-type returnType string
+type ReturnType string
 
 // in: func(WorkerReturn, context.Context, CallID, err string)
 // in: func(WorkerReturn, context.Context, CallID, ret T, err string)
@@ -123,7 +156,12 @@ func rfunc(in interface{}) func(context.Context, storiface.CallID, storiface.Wor
 		var ro []reflect.Value
 
 		if withRet {
-			ro = rf.Call([]reflect.Value{rwr, rctx, rci, reflect.ValueOf(i), rerr})
+			ret := reflect.ValueOf(i)
+			if i == nil {
+				ret = reflect.Zero(rf.Type().In(3))
+			}
+
+			ro = rf.Call([]reflect.Value{rwr, rctx, rci, ret, rerr})
 		} else {
 			ro = rf.Call([]reflect.Value{rwr, rctx, rci, rerr})
 		}
@@ -136,7 +174,7 @@ func rfunc(in interface{}) func(context.Context, storiface.CallID, storiface.Wor
 	}
 }
 
-var returnFunc = map[returnType]func(context.Context, storiface.CallID, storiface.WorkerReturn, interface{}, error) error{
+var returnFunc = map[ReturnType]func(context.Context, storiface.CallID, storiface.WorkerReturn, interface{}, error) error{
 	"AddPiece":        rfunc(storiface.WorkerReturn.ReturnAddPiece),
 	"SealPreCommit1":  rfunc(storiface.WorkerReturn.ReturnSealPreCommit1),
 	"SealPreCommit2":  rfunc(storiface.WorkerReturn.ReturnSealPreCommit2),
@@ -150,13 +188,13 @@ var returnFunc = map[returnType]func(context.Context, storiface.CallID, storifac
 	"Fetch":           rfunc(storiface.WorkerReturn.ReturnFetch),
 }
 
-func (l *LocalWorker) asyncCall(ctx context.Context, sector abi.SectorID, rt returnType, work func(ci storiface.CallID) (interface{}, error)) (storiface.CallID, error) {
+func (l *LocalWorker) asyncCall(ctx context.Context, sector abi.SectorID, rt ReturnType, work func(ci storiface.CallID) (interface{}, error)) (storiface.CallID, error) {
 	ci := storiface.CallID{
 		Sector: sector,
 		ID:     uuid.New(),
 	}
 
-	if err := l.ct.onStart(ci); err != nil {
+	if err := l.ct.onStart(ci, rt); err != nil {
 		log.Errorf("tracking call (start): %+v", err)
 	}
 
@@ -196,7 +234,7 @@ func errstr(err error) string {
 }
 
 func (l *LocalWorker) NewSector(ctx context.Context, sector abi.SectorID) error {
-	sb, err := l.sb()
+	sb, err := l.executor()
 	if err != nil {
 		return err
 	}
@@ -205,7 +243,7 @@ func (l *LocalWorker) NewSector(ctx context.Context, sector abi.SectorID) error
 }
 
 func (l *LocalWorker) AddPiece(ctx context.Context, sector abi.SectorID, epcs []abi.UnpaddedPieceSize, sz abi.UnpaddedPieceSize, r io.Reader) (storiface.CallID, error) {
-	sb, err := l.sb()
+	sb, err := l.executor()
 	if err != nil {
 		return storiface.UndefCall, err
 	}
@@ -240,7 +278,7 @@ func (l *LocalWorker) SealPreCommit1(ctx context.Context, sector abi.SectorID, t
 			}
 		}
 
-		sb, err := l.sb()
+		sb, err := l.executor()
 		if err != nil {
 			return nil, err
 		}
@@ -250,7 +288,7 @@ func (l *LocalWorker) SealPreCommit1(ctx context.Context, sector abi.SectorID, t
 }
 
 func (l *LocalWorker) SealPreCommit2(ctx context.Context, sector abi.SectorID, phase1Out storage2.PreCommit1Out) (storiface.CallID, error) {
-	sb, err := l.sb()
+	sb, err := l.executor()
 	if err != nil {
 		return storiface.UndefCall, err
 	}
@@ -261,7 +299,7 @@ func (l *LocalWorker) SealPreCommit2(ctx context.Context, sector abi.SectorID, p
 }
 
 func (l *LocalWorker) SealCommit1(ctx context.Context, sector abi.SectorID, ticket abi.SealRandomness, seed abi.InteractiveSealRandomness, pieces []abi.PieceInfo, cids storage2.SectorCids) (storiface.CallID, error) {
-	sb, err := l.sb()
+	sb, err := l.executor()
 	if err != nil {
 		return storiface.UndefCall, err
 	}
@@ -272,7 +310,7 @@ func (l *LocalWorker) SealCommit1(ctx context.Context, sector abi.SectorID, tick
 }
 
 func (l *LocalWorker) SealCommit2(ctx context.Context, sector abi.SectorID, phase1Out storage2.Commit1Out) (storiface.CallID, error) {
-	sb, err := l.sb()
+	sb, err := l.executor()
 	if err != nil {
 		return storiface.UndefCall, err
 	}
@@ -283,7 +321,7 @@ func (l *LocalWorker) SealCommit2(ctx context.Context, sector abi.SectorID, phas
 }
 
 func (l *LocalWorker) FinalizeSector(ctx context.Context, sector abi.SectorID, keepUnsealed []storage2.Range) (storiface.CallID, error) {
-	sb, err := l.sb()
+	sb, err := l.executor()
 	if err != nil {
 		return storiface.UndefCall, err
 	}
@@ -330,7 +368,7 @@ func (l *LocalWorker) MoveStorage(ctx context.Context, sector abi.SectorID, type
 }
 
 func (l *LocalWorker) UnsealPiece(ctx context.Context, sector abi.SectorID, index storiface.UnpaddedByteIndex, size abi.UnpaddedPieceSize, randomness abi.SealRandomness, cid cid.Cid) (storiface.CallID, error) {
-	sb, err := l.sb()
+	sb, err := l.executor()
 	if err != nil {
 		return storiface.UndefCall, err
 	}
@@ -353,7 +391,7 @@ func (l *LocalWorker) UnsealPiece(ctx context.Context, sector abi.SectorID, inde
 }
 
 func (l *LocalWorker) ReadPiece(ctx context.Context, writer io.Writer, sector abi.SectorID, index storiface.UnpaddedByteIndex, size abi.UnpaddedPieceSize) (storiface.CallID, error) {
-	sb, err := l.sb()
+	sb, err := l.executor()
 	if err != nil {
 		return storiface.UndefCall, err
 	}
@@ -405,10 +443,11 @@ func (l *LocalWorker) Info(context.Context) (storiface.WorkerInfo, error) {
 }
 
 func (l *LocalWorker) Closing(ctx context.Context) (<-chan struct{}, error) {
-	return make(chan struct{}), nil
+	return l.closing, nil
 }
 
 func (l *LocalWorker) Close() error {
+	close(l.closing)
 	return nil
 }
 
diff --git a/node/modules/storageminer.go b/node/modules/storageminer.go
index af76861c1..80bab7868 100644
--- a/node/modules/storageminer.go
+++ b/node/modules/storageminer.go
@@ -4,7 +4,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"github.com/filecoin-project/go-statestore"
 	"net/http"
 	"time"
 
@@ -43,6 +42,7 @@ import (
 	"github.com/filecoin-project/go-multistore"
 	paramfetch "github.com/filecoin-project/go-paramfetch"
 	"github.com/filecoin-project/go-state-types/abi"
+	"github.com/filecoin-project/go-statestore"
 	"github.com/filecoin-project/go-storedcounter"
 
 	sectorstorage "github.com/filecoin-project/lotus/extern/sector-storage"
@@ -50,15 +50,15 @@ import (
 	"github.com/filecoin-project/lotus/extern/sector-storage/stores"
 	sealing "github.com/filecoin-project/lotus/extern/storage-sealing"
 	"github.com/filecoin-project/lotus/extern/storage-sealing/sealiface"
-	"github.com/filecoin-project/lotus/journal"
-	"github.com/filecoin-project/lotus/markets"
 
 	lapi "github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain/gen"
 	"github.com/filecoin-project/lotus/chain/gen/slashfilter"
 	"github.com/filecoin-project/lotus/chain/types"
+	"github.com/filecoin-project/lotus/journal"
 	"github.com/filecoin-project/lotus/lib/blockstore"
+	"github.com/filecoin-project/lotus/markets"
 	marketevents "github.com/filecoin-project/lotus/markets/loggers"
 	"github.com/filecoin-project/lotus/markets/retrievaladapter"
 	"github.com/filecoin-project/lotus/miner"