diff --git a/extern/sector-storage/manager.go b/extern/sector-storage/manager.go
index 3db7ac9ec91..d3fef8533f6 100644
--- a/extern/sector-storage/manager.go
+++ b/extern/sector-storage/manager.go
@@ -208,6 +208,7 @@ func (m *Manager) schedFetch(sector storage.SectorRef, ft storiface.SectorFileTy
 
 func (m *Manager) readPiece(sink io.Writer, sector storage.SectorRef, offset storiface.UnpaddedByteIndex, size abi.UnpaddedPieceSize, rok *bool) func(ctx context.Context, w Worker) error {
 	return func(ctx context.Context, w Worker) error {
+		log.Debugf("read piece data from sector %d, offset %d, size %d", sector.ID, offset, size)
 		r, err := m.waitSimpleCall(ctx)(w.ReadPiece(ctx, sink, sector, offset, size))
 		if err != nil {
 			return err
@@ -215,6 +216,7 @@ func (m *Manager) readPiece(sink io.Writer, sector storage.SectorRef, offset sto
 		if r != nil {
 			*rok = r.(bool)
 		}
+		log.Debugf("completed read piece data from sector %d, offset %d, size %d: read ok? %t", sector.ID, offset, size, *rok)
 		return nil
 	}
 }
@@ -225,11 +227,13 @@ func (m *Manager) tryReadUnsealedPiece(ctx context.Context, sink io.Writer, sect
 	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()
 
+	log.Debugf("acquire read sector lock for sector %d", sector.ID)
 	if err := m.index.StorageLock(ctx, sector.ID, storiface.FTUnsealed, storiface.FTNone); err != nil {
 		returnErr = xerrors.Errorf("acquiring read sector lock: %w", err)
 		return
 	}
 
+	log.Debugf("find unsealed sector %d", sector.ID)
 	// passing 0 spt because we only need it when allowFetch is true
 	best, err := m.index.StorageFindSector(ctx, sector.ID, storiface.FTUnsealed, 0, false)
 	if err != nil {
@@ -240,41 +244,49 @@ func (m *Manager) tryReadUnsealedPiece(ctx context.Context, sink io.Writer, sect
 	foundUnsealed = len(best) > 0
 	if foundUnsealed { // append to existing
 		// There is unsealed sector, see if we can read from it
+		log.Debugf("found unsealed sector %d", sector.ID)
 
 		selector = newExistingSelector(m.index, sector.ID, storiface.FTUnsealed, false)
 
+		log.Debugf("scheduling read of unsealed sector %d", sector.ID)
 		err = m.sched.Schedule(ctx, sector, sealtasks.TTReadUnsealed, selector, m.schedFetch(sector, storiface.FTUnsealed, storiface.PathSealing, storiface.AcquireMove),
 			m.readPiece(sink, sector, offset, size, &readOk))
 		if err != nil {
 			returnErr = xerrors.Errorf("reading piece from sealed sector: %w", err)
 		}
 	} else {
+		log.Debugf("did not find unsealed sector %d", sector.ID)
 		selector = newAllocSelector(m.index, storiface.FTUnsealed, storiface.PathSealing)
 	}
 	return
 }
 
 func (m *Manager) ReadPiece(ctx context.Context, sink io.Writer, sector storage.SectorRef, offset storiface.UnpaddedByteIndex, size abi.UnpaddedPieceSize, ticket abi.SealRandomness, unsealed cid.Cid) error {
+	log.Debugf("fetch and read piece in sector %d, offset %d, size %d", sector.ID, offset, size)
 	foundUnsealed, readOk, selector, err := m.tryReadUnsealedPiece(ctx, sink, sector, offset, size)
 	if err != nil {
 		return err
 	}
 	if readOk {
+		log.Debugf("completed read of unsealed piece in sector %d, offset %d, size %d", sector.ID, offset, size)
 		return nil
 	}
 	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()
 
+	log.Debugf("acquire unseal sector lock for sector %d", sector.ID)
 	if err := m.index.StorageLock(ctx, sector.ID, storiface.FTSealed|storiface.FTCache, storiface.FTUnsealed); err != nil {
 		return xerrors.Errorf("acquiring unseal sector lock: %w", err)
 	}
 
 	unsealFetch := func(ctx context.Context, worker Worker) error {
+		log.Debugf("copy sealed/cache sector data for sector %d", sector.ID)
 		if _, err := m.waitSimpleCall(ctx)(worker.Fetch(ctx, sector, storiface.FTSealed|storiface.FTCache, storiface.PathSealing, storiface.AcquireCopy)); err != nil {
 			return xerrors.Errorf("copy sealed/cache sector data: %w", err)
 		}
 
 		if foundUnsealed {
+			log.Debugf("copy unsealed sector data for sector %d", sector.ID)
 			if _, err := m.waitSimpleCall(ctx)(worker.Fetch(ctx, sector, storiface.FTUnsealed, storiface.PathSealing, storiface.AcquireMove)); err != nil {
 				return xerrors.Errorf("copy unsealed sector data: %w", err)
 			}
@@ -291,13 +303,16 @@ func (m *Manager) ReadPiece(ctx context.Context, sink io.Writer, sector storage.
 		return xerrors.Errorf("getting sector size: %w", err)
 	}
 
+	log.Debugf("schedule unseal for sector %d", sector.ID)
 	err = m.sched.Schedule(ctx, sector, sealtasks.TTUnseal, selector, unsealFetch, func(ctx context.Context, w Worker) error {
 		// TODO: make restartable
 
 		// NOTE: we're unsealing the whole sector here as with SDR we can't really
 		//  unseal the sector partially. Requesting the whole sector here can
 		//  save us some work in case another piece is requested from here
+		log.Debugf("unseal sector %d", sector.ID)
 		_, err := m.waitSimpleCall(ctx)(w.UnsealPiece(ctx, sector, 0, abi.PaddedPieceSize(ssize).Unpadded(), ticket, unsealed))
+		log.Debugf("completed unseal sector %d", sector.ID)
 		return err
 	})
 	if err != nil {
@@ -306,6 +321,7 @@ func (m *Manager) ReadPiece(ctx context.Context, sink io.Writer, sector storage.
 
 	selector = newExistingSelector(m.index, sector.ID, storiface.FTUnsealed, false)
 
+	log.Debugf("schedule read piece for sector %d, offset %d, size %d", sector.ID, offset, size)
 	err = m.sched.Schedule(ctx, sector, sealtasks.TTReadUnsealed, selector, m.schedFetch(sector, storiface.FTUnsealed, storiface.PathSealing, storiface.AcquireMove),
 		m.readPiece(sink, sector, offset, size, &readOk))
 	if err != nil {
@@ -316,6 +332,7 @@ func (m *Manager) ReadPiece(ctx context.Context, sink io.Writer, sector storage.
 		return xerrors.Errorf("failed to read unsealed piece")
 	}
 
+	log.Debugf("completed read of piece in sector %d, offset %d, size %d", sector.ID, offset, size)
 	return nil
 }
 
diff --git a/markets/retrievaladapter/provider.go b/markets/retrievaladapter/provider.go
index 557dd3b6d64..e58257c8abc 100644
--- a/markets/retrievaladapter/provider.go
+++ b/markets/retrievaladapter/provider.go
@@ -47,6 +47,8 @@ func (rpn *retrievalProviderNode) GetMinerWorkerAddress(ctx context.Context, min
 }
 
 func (rpn *retrievalProviderNode) UnsealSector(ctx context.Context, sectorID abi.SectorNumber, offset abi.UnpaddedPieceSize, length abi.UnpaddedPieceSize) (io.ReadCloser, error) {
+	log.Debugf("get sector %d, offset %d, length %d", sectorID, offset, length)
+
 	si, err := rpn.miner.GetSectorInfo(sectorID)
 	if err != nil {
 		return nil, err
@@ -73,7 +75,9 @@ func (rpn *retrievalProviderNode) UnsealSector(ctx context.Context, sectorID abi
 		if si.CommD != nil {
 			commD = *si.CommD
 		}
+
 		// Read the piece into the pipe's writer, unsealing the piece if necessary
+		log.Debugf("read piece in sector %d, offset %d, length %d from miner %d", sectorID, offset, length, mid)
 		err := rpn.sealer.ReadPiece(ctx, w, ref, storiface.UnpaddedByteIndex(offset), length, si.TicketValue, commD)
 		if err != nil {
 			log.Errorf("failed to unseal piece from sector %d: %s", sectorID, err)