diff --git a/pkg/local_object_storage/blobstor/uringstor/control.go b/pkg/local_object_storage/blobstor/uringstor/control.go
index d6903b5bf..c8a4d7ef4 100644
--- a/pkg/local_object_storage/blobstor/uringstor/control.go
+++ b/pkg/local_object_storage/blobstor/uringstor/control.go
@@ -1,6 +1,7 @@
 package uringstor
 
 import (
+	"math/bits"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -20,11 +21,13 @@ type nameIDPair struct {
 func (s *Storage) Open(readOnly bool) error {
 	s.readOnly = readOnly
 
-	lp, err := loop.New(s.loopSize, s.loopParams)
-	if err != nil {
-		return err
+	if s.loopSize != 0 {
+		lp, err := loop.New(s.loopSize, &s.loopParams)
+		if err != nil {
+			return err
+		}
+		s.loop = lp
 	}
-	s.loop = lp
 
 	if !readOnly {
 		if err := util.MkdirAllX(s.path, os.ModePerm); err != nil {
@@ -54,17 +57,14 @@ func (s *Storage) Open(readOnly bool) error {
 
 	maxID := -1
 	for i := range ids {
-		b := slab.NewUringBackend(filepath.Join(s.path, ids[i].name), s.loop)
-		sl, err := slab.New(slab.Params{
-			Backend:  b,
-			ReadOnly: s.readOnly,
-		})
+		slabPath := filepath.Join(s.path, ids[i].name)
+		sl, err := s.openSlab(slabPath, 0, 0)
 		if err != nil {
 			return err
 		}
 
 		slabID := ids[i].id
-		index := sl.ChunkSize() / uint32(s.minObjectSize)
+		index := bits.TrailingZeros32(sl.ChunkSize()) - bits.TrailingZeros32(uint32(s.minObjectSize))
 		s.slabIDs[index] = append(s.slabIDs[index], slabID)
 		s.slabMap[slabID] = sl
 
@@ -76,6 +76,21 @@ func (s *Storage) Open(readOnly bool) error {
 	if maxID > 0 {
 		s.nextID = uint16(maxID + 1)
 	}
+	for i := range s.slabIDs {
+		if len(s.slabIDs[i]) != 0 {
+			continue
+		}
+
+		slabPath := filepath.Join(s.path, strconv.FormatUint(uint64(s.nextID), idToStringBase))
+		ss, err := s.openSlab(slabPath, uint32(s.minObjectSize<<i), s.slabCapacity)
+		if err != nil {
+			return err
+		}
+
+		s.slabIDs[i] = append(s.slabIDs[i], s.nextID)
+		s.slabMap[s.nextID] = ss
+		s.nextID++
+	}
 	return nil
 }
 
@@ -96,7 +111,9 @@ func (s *Storage) Close() error {
 		s.slabIDs[i] = nil
 	}
 
-	s.loop.Close()
-	s.loop = nil
+	if s.loop != nil {
+		s.loop.Close()
+		s.loop = nil
+	}
 	return nil
 }
diff --git a/pkg/local_object_storage/blobstor/uringstor/put.go b/pkg/local_object_storage/blobstor/uringstor/put.go
index e63a5c66b..513d97521 100644
--- a/pkg/local_object_storage/blobstor/uringstor/put.go
+++ b/pkg/local_object_storage/blobstor/uringstor/put.go
@@ -4,7 +4,6 @@ import (
 	"math/bits"
 	"path/filepath"
 	"strconv"
-	"syscall"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/uringstor/slab"
@@ -34,13 +33,15 @@ func (s *Storage) Put(prm common.PutPrm) (common.PutRes, error) {
 		assert(ok, "slab ID is here, but the slab is missing: %d", slabID)
 		s.slabMtx.RUnlock()
 
+		//start := time.Now()
 		offset, err := ss.Put(prm.RawData)
+		//fmt.Println(time.Since(start))
 		if err == nil {
 			storageID := marshalStorageID(slabID, offset)
-			storagelog.Write(s.log,
-				storagelog.OpField("PUT"),
-				storagelog.StorageIDField(storageID[:]),
-				storagelog.AddressField(prm.Address))
+			// storagelog.Write(s.log,
+			// 	storagelog.OpField("PUT"),
+			// 	storagelog.StorageIDField(storageID[:]),
+			// 	storagelog.AddressField(prm.Address))
 			return common.PutRes{StorageID: storageID[:]}, nil
 		}
 		s.log.Error("can't put object to a slab", zap.Error(err))
@@ -58,21 +59,11 @@ func (s *Storage) Put(prm common.PutPrm) (common.PutRes, error) {
 		slabID = s.slabIDs[bucket][ln]
 		ss = s.slabMap[slabID]
 	} else {
-		slabPath := filepath.Join(s.path, strconv.FormatUint(uint64(s.nextID), idToStringBase))
-		b := slab.NewUringBackend(slabPath, s.loop)
-
 		var err error
-		ss, err = slab.New(slab.Params{
-			Backend:   b,
-			ChunkSize: uint32(up2),
-			Capacity:  s.slabCapacity,
-			ReadOnly:  s.readOnly,
-		})
+		slabPath := filepath.Join(s.path, strconv.FormatUint(uint64(s.nextID), idToStringBase))
+		ss, err = s.openSlab(slabPath, uint32(up2), s.slabCapacity)
 		if err != nil {
 			s.slabMtx.Unlock()
-			if err == syscall.ENOSPC {
-				err = common.ErrNoSpace
-			}
 			return common.PutRes{}, err
 		}
 
diff --git a/pkg/local_object_storage/blobstor/uringstor/slab/backend.go b/pkg/local_object_storage/blobstor/uringstor/slab/backend.go
index fdcf53299..cdca74aec 100644
--- a/pkg/local_object_storage/blobstor/uringstor/slab/backend.go
+++ b/pkg/local_object_storage/blobstor/uringstor/slab/backend.go
@@ -88,7 +88,11 @@ func (f *UringFile) Open(flags int) error {
 		return err
 	}
 
-	f.fd = f.File.file.Fd()
+	fd := f.File.file.Fd()
+    //if err := f.loop.RegisterFiles([]int32{int32(fd)}); err != nil {
+	//	return err
+	//}
+	f.fd = fd
 	return nil
 }
 
@@ -104,6 +108,7 @@ func (f *UringFile) Close() error {
 func (f *UringFile) Fallocate(size int64) error {
 	var sqe uring.SQEntry
 	uring.Fallocate(&sqe, f.fd, _FALLOC_FL_ZERO_RANGE, 0, uint64(size))
+	sqe.SetFlags(uring.IOSQE_FIXED_FILE)
 
 	_, err := f.loop.Complete(sqe)
 	return err
@@ -112,6 +117,7 @@ func (f *UringFile) Fallocate(size int64) error {
 func (f *UringFile) WriteAt(buf []byte, offset int64) error {
 	var sqe uring.SQEntry
 	uring.WriteAt(&sqe, f.fd, buf, uint64(offset))
+	sqe.SetFlags(uring.IOSQE_FIXED_FILE)
 
 	_, err := f.loop.Complete(sqe)
 	return err
@@ -120,6 +126,7 @@ func (f *UringFile) WriteAt(buf []byte, offset int64) error {
 func (f *UringFile) ReadAt(buf []byte, offset int64) error {
 	var sqe uring.SQEntry
 	uring.ReadAt(&sqe, f.fd, buf, uint64(offset))
+	sqe.SetFlags(uring.IOSQE_FIXED_FILE)
 
 	_, err := f.loop.Complete(sqe)
 	return err
diff --git a/pkg/local_object_storage/blobstor/uringstor/uring.go b/pkg/local_object_storage/blobstor/uringstor/uring.go
index 5adc39497..c0a445e10 100644
--- a/pkg/local_object_storage/blobstor/uringstor/uring.go
+++ b/pkg/local_object_storage/blobstor/uringstor/uring.go
@@ -21,6 +21,7 @@ type Storage struct {
 	path          string
 	maxObjectSize uint64
 	minObjectSize uint64
+	noSync        bool
 	readOnly      bool
 	loopSize      int
 	loopParams    loop.Params
@@ -51,6 +52,7 @@ func New(opts ...Option) (*Storage, error) {
 	s.maxObjectSize = defaultMaxObjectSize
 	s.minObjectSize = defaultMinObjectSize
 	s.loopSize = defaultUringLoopSize
+	s.log = &logger.Logger{Logger: zap.NewNop()}
 	for i := range opts {
 		opts[i](&s)
 	}
@@ -102,6 +104,12 @@ func WithLoopParams(size int, p loop.Params) Option {
 	}
 }
 
+func WithOSBackend() Option {
+	return func(s *Storage) {
+		s.loopSize = 0
+	}
+}
+
 func WithMaxObjectSize(size int64) Option {
 	return func(s *Storage) {
 		s.maxObjectSize = uint64(size)
@@ -113,3 +121,9 @@ func WithLogger(l *logger.Logger) Option {
 		s.log = &logger.Logger{Logger: l.With(zap.String("component", Type))}
 	}
 }
+
+func WithNoSync(noSync bool) Option {
+	return func(s *Storage) {
+		s.noSync = noSync
+	}
+}
diff --git a/pkg/local_object_storage/blobstor/uringstor/util.go b/pkg/local_object_storage/blobstor/uringstor/util.go
index fcb169186..c3a27d827 100644
--- a/pkg/local_object_storage/blobstor/uringstor/util.go
+++ b/pkg/local_object_storage/blobstor/uringstor/util.go
@@ -4,6 +4,7 @@ import (
 	"encoding/binary"
 	"fmt"
 
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/uringstor/slab"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/util/logicerr"
 	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
 )
@@ -32,3 +33,25 @@ func assert(ok bool, msg string, args ...any) {
 		panic(fmt.Sprintf(msg, args...))
 	}
 }
+
+func (s *Storage) openSlab(p string, chunkSize uint32, slabCapacity uint64) (*slab.Slab, error) {
+	var b slab.Backend
+	if s.loop == nil {
+		b = slab.NewFileBackend(p)
+	} else {
+		b = slab.NewUringBackend(p, s.loop)
+	}
+
+	ss, err := slab.New(slab.Params{
+		Backend:   b,
+		ChunkSize: chunkSize,
+		Capacity:  slabCapacity,
+		ReadOnly:  s.readOnly,
+		NoSync:    s.noSync,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return ss, nil
+}