diff --git a/api/api.go b/api/api.go
index 5d46ef5fa..598777695 100644
--- a/api/api.go
+++ b/api/api.go
@@ -115,4 +115,7 @@ type FullNode interface {
 // Full API is a low-level interface to the Filecoin network storage miner node
 type StorageMiner interface {
 	Common
+
+	// Temp api for testing
+	StoreGarbageData(context.Context) (uint64, error)
 }
diff --git a/api/struct.go b/api/struct.go
index 430619d44..8f24bc272 100644
--- a/api/struct.go
+++ b/api/struct.go
@@ -68,6 +68,7 @@ type StorageMinerStruct struct {
 	CommonStruct
 
 	Internal struct {
+		StoreGarbageData func(context.Context) (uint64, error)
 	}
 }
 
@@ -185,6 +186,10 @@ func (c *FullNodeStruct) ChainNotify(ctx context.Context) (<-chan *store.HeadCha
 	return c.Internal.ChainNotify(ctx)
 }
 
+func (c *StorageMinerStruct) StoreGarbageData(ctx context.Context) (uint64, error) {
+	return c.Internal.StoreGarbageData(ctx)
+}
+
 var _ Common = &CommonStruct{}
 var _ FullNode = &FullNodeStruct{}
 var _ StorageMiner = &StorageMinerStruct{}
diff --git a/cmd/lotus-storage-miner/main.go b/cmd/lotus-storage-miner/main.go
index 390b50a37..10142d3f8 100644
--- a/cmd/lotus-storage-miner/main.go
+++ b/cmd/lotus-storage-miner/main.go
@@ -21,6 +21,7 @@ func main() {
 	local := []*cli.Command{
 		runCmd,
 		initCmd,
+		storeGarbageCmd,
 	}
 	jaeger := tracing.SetupJaegerTracing("lotus")
 	defer func() {
diff --git a/cmd/lotus-storage-miner/run.go b/cmd/lotus-storage-miner/run.go
index 42a26eb23..6919d44b2 100644
--- a/cmd/lotus-storage-miner/run.go
+++ b/cmd/lotus-storage-miner/run.go
@@ -11,7 +11,9 @@ import (
 	lcli "github.com/filecoin-project/go-lotus/cli"
 	"github.com/filecoin-project/go-lotus/lib/auth"
 	"github.com/filecoin-project/go-lotus/lib/jsonrpc"
+	"github.com/filecoin-project/go-lotus/lib/sectorbuilder"
 	"github.com/filecoin-project/go-lotus/node"
+	"github.com/filecoin-project/go-lotus/node/modules"
 	"github.com/filecoin-project/go-lotus/node/repo"
 )
 
@@ -36,7 +38,8 @@ var runCmd = &cli.Command{
 			return err
 		}
 
-		r, err := repo.NewFS(cctx.String(FlagStorageRepo))
+		storageRepoPath := cctx.String(FlagStorageRepo)
+		r, err := repo.NewFS(storageRepoPath)
 		if err != nil {
 			return err
 		}
@@ -46,7 +49,7 @@ var runCmd = &cli.Command{
 			return err
 		}
 		if !ok {
-			return xerrors.Errorf("repo at '%s' is not initialized, run 'lotus-storage-miner init' to set it up", cctx.String(FlagStorageRepo))
+			return xerrors.Errorf("repo at '%s' is not initialized, run 'lotus-storage-miner init' to set it up", storageRepoPath)
 		}
 
 		var minerapi api.StorageMiner
@@ -62,6 +65,7 @@ var runCmd = &cli.Command{
 				}
 				return lr.SetAPIEndpoint(apima)
 			}),
+			node.Override(new(*sectorbuilder.SectorBuilderConfig), modules.SectorBuilderConfig(storageRepoPath)),
 		)
 		if err != nil {
 			return err
@@ -83,3 +87,21 @@ var runCmd = &cli.Command{
 		return http.ListenAndServe("127.0.0.1:"+cctx.String("api"), http.DefaultServeMux)
 	},
 }
+
+var storeGarbageCmd = &cli.Command{
+	Name:  "store-garbage",
+	Usage: "store random data in a sector",
+	Action: func(cctx *cli.Context) error {
+		nodeApi, err := lcli.GetAPI(cctx)
+		if err != nil {
+			return err
+		}
+		ctx := lcli.ReqContext(cctx)
+
+		_ = ctx
+		_ = nodeApi
+		// ???
+		// wait a second, i need the api handler for the storage miner...
+		return nil
+	},
+}
diff --git a/node/builder.go b/node/builder.go
index c8c61dc3b..191a340c6 100644
--- a/node/builder.go
+++ b/node/builder.go
@@ -249,7 +249,6 @@ func Config(cfg *config.Root) Option {
 		),
 
 		ApplyIf(func(s *Settings) bool { return s.nodeType == nodeStorageMiner },
-			Override(new(*sectorbuilder.SectorBuilderConfig), modules.SectorBuilderConfig),
 			Override(new(*sectorbuilder.SectorBuilder), sectorbuilder.New),
 		),
 	)
diff --git a/node/impl/storminer.go b/node/impl/storminer.go
index dfaad454c..cd41b2531 100644
--- a/node/impl/storminer.go
+++ b/node/impl/storminer.go
@@ -1,6 +1,9 @@
 package impl
 
 import (
+	"context"
+	"io/ioutil"
+
 	"github.com/filecoin-project/go-lotus/api"
 	"github.com/filecoin-project/go-lotus/lib/sectorbuilder"
 )
@@ -11,4 +14,24 @@ type StorageMinerAPI struct {
 	SectorBuilder *sectorbuilder.SectorBuilder
 }
 
+func (sm *StorageMinerAPI) StoreGarbageData(ctx context.Context) (uint64, error) {
+	data := make([]byte, 1024)
+	fi, err := ioutil.TempFile("", "lotus-garbage")
+	if err != nil {
+		return 0, err
+	}
+
+	if _, err := fi.Write(data); err != nil {
+		return 0, err
+	}
+	fi.Close()
+
+	sectorId, err := sm.SectorBuilder.AddPiece("foo", 1024, fi.Name())
+	if err != nil {
+		return 0, err
+	}
+
+	return sectorId, err
+}
+
 var _ api.StorageMiner = &StorageMinerAPI{}
diff --git a/node/modules/core.go b/node/modules/core.go
index 8892e9b7d..b6678d46a 100644
--- a/node/modules/core.go
+++ b/node/modules/core.go
@@ -219,22 +219,24 @@ func LoadGenesis(genBytes []byte) func(blockstore.Blockstore) Genesis {
 	}
 }
 
-func SectorBuilderConfig(storagePath string) (*sectorbuilder.SectorBuilderConfig, error) {
-	metadata := filepath.Join(storagePath, "meta")
-	sealed := filepath.Join(storagePath, "sealed")
-	staging := filepath.Join(storagePath, "staging")
+func SectorBuilderConfig(storagePath string) func() (*sectorbuilder.SectorBuilderConfig, error) {
+	return func() (*sectorbuilder.SectorBuilderConfig, error) {
+		metadata := filepath.Join(storagePath, "meta")
+		sealed := filepath.Join(storagePath, "sealed")
+		staging := filepath.Join(storagePath, "staging")
 
-	// TODO: get the address of the miner actor
-	minerAddr, err := address.NewIDAddress(42)
-	if err != nil {
-		return nil, err
+		// TODO: get the address of the miner actor
+		minerAddr, err := address.NewIDAddress(42)
+		if err != nil {
+			return nil, err
+		}
+
+		return &sectorbuilder.SectorBuilderConfig{
+			Miner:       minerAddr,
+			SectorSize:  1024,
+			MetadataDir: metadata,
+			SealedDir:   sealed,
+			StagedDir:   staging,
+		}, nil
 	}
-
-	return &sectorbuilder.SectorBuilderConfig{
-		Miner:       minerAddr,
-		SectorSize:  1024,
-		MetadataDir: metadata,
-		SealedDir:   sealed,
-		StagedDir:   staging,
-	}, nil
 }