diff --git a/pkg/local_object_storage/writecache/flush.go b/pkg/local_object_storage/writecache/flush.go
index d9e34ceab..3f9b36f9d 100644
--- a/pkg/local_object_storage/writecache/flush.go
+++ b/pkg/local_object_storage/writecache/flush.go
@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/qos"
 	objectCore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/object"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
@@ -14,6 +15,7 @@ import (
 	meta "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/metabase"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
 	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
+	"git.frostfs.info/TrueCloudLab/frostfs-qos/tagging"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
 	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	"go.opentelemetry.io/otel/attribute"
@@ -35,6 +37,7 @@ func (c *cache) runFlushLoop(ctx context.Context) {
 	if c.disableBackgroundFlush {
 		return
 	}
+	ctx = tagging.ContextWithIOTag(ctx, qos.IOTagWritecache.String())
 	fl := newFlushLimiter(c.flushSizeLimit)
 	c.wg.Add(1)
 	go func() {