diff --git a/ydb/core/blobstorage/ut_blobstorage/balancing.cpp b/ydb/core/blobstorage/ut_blobstorage/balancing.cpp
index b83dfd4bd81e..cba5903c69e2 100644
--- a/ydb/core/blobstorage/ut_blobstorage/balancing.cpp
+++ b/ydb/core/blobstorage/ut_blobstorage/balancing.cpp
@@ -231,19 +231,12 @@ struct TStopOneNodeTest {
             Env.StartNode(nodeIdWithBlob);
             Env->Sim(TDuration::Seconds(30));
 
-            Cerr << "Start compaction 1" << Endl;
+            Cerr << "Start compaction" << Endl;
             for (ui32 pos = 0; pos < Env->Settings.NodeCount; ++pos) {
                 Env->CompactVDisk(Env.GroupInfo->GetActorId(pos));
             }
             Env->Sim(TDuration::Seconds(30));
-            Cerr << "Finish compaction 1" << Endl;
-
-            Cerr << "Start compaction 2" << Endl;
-            for (ui32 pos = 0; pos < Env->Settings.NodeCount; ++pos) {
-                Env->CompactVDisk(Env.GroupInfo->GetActorId(pos));
-            }
-            Env->Sim(TDuration::Seconds(30));
-            Cerr << "Finish compaction 2" << Endl;
+            Cerr << "Finish compaction" << Endl;
 
             Env.CheckPartsLocations(MakeLogoBlobId(step, data.size()));
             UNIT_ASSERT_VALUES_EQUAL(Env.SendGet(step, data.size())->Get()->Responses[0].Buffer.ConvertToString(), data);
@@ -327,12 +320,6 @@ struct TRandomTest {
         }
         Env->Sim(TDuration::Seconds(60));
 
-        Cerr << "Start compaction 2" << Endl;
-        for (ui32 pos = 0; pos < Env->Settings.NodeCount; ++pos) {
-            Env->CompactVDisk(Env.GroupInfo->GetActorId(pos));
-        }
-        Env->Sim(TDuration::Seconds(60));
-
         Cerr << "Start checking" << Endl;
         for (ui32 step: successfulSteps) {
             Env.CheckPartsLocations(MakeLogoBlobId(step, data[step].size()));
@@ -408,13 +395,6 @@ struct TTwoPartsOnOneNodeTest {
         Env->Sim(TDuration::Seconds(30));
         Cerr << "Finish compaction 1" << Endl;
 
-        Cerr << "Start compaction 2" << Endl;
-        for (ui32 pos = 0; pos < Env->Settings.NodeCount; ++pos) {
-            Env->CompactVDisk(Env.GroupInfo->GetActorId(pos));
-        }
-        Env->Sim(TDuration::Seconds(30));
-        Cerr << "Finish compaction 2" << Endl;
-
         Env.CheckPartsLocations(MakeLogoBlobId(step, data.size()));
         UNIT_ASSERT_VALUES_EQUAL(Env.SendGet(step, data.size())->Get()->Responses[0].Buffer.ConvertToString(), data);
     }
diff --git a/ydb/core/blobstorage/vdisk/balance/balancing_actor.cpp b/ydb/core/blobstorage/vdisk/balance/balancing_actor.cpp
index 885adbc6f9ba..c4990b306643 100644
--- a/ydb/core/blobstorage/vdisk/balance/balancing_actor.cpp
+++ b/ydb/core/blobstorage/vdisk/balance/balancing_actor.cpp
@@ -111,6 +111,15 @@ namespace NBalancing {
         }
 
         void CollectKeys() {
+            if (ConnectedVDisks.size() + 1 != GInfo->GetTotalVDisksNum()) {
+                // not all vdisks are connected
+                STLOG(PRI_INFO, BS_VDISK_BALANCING, BSVB11, VDISKP(Ctx->VCtx, "Not all vdisks are connected, balancing should work only for full groups"),
+                    (ConnectedVDisks, ConnectedVDisks.size()), (TotalVDisksInGroup, GInfo->GetTotalVDisksNum()));
+                Send(Ctx->SkeletonId, new TEvStartBalancing());
+                PassAway();
+                return;
+            }
+
             THPTimer timer;
 
             for (ui32 cnt = 0; It.Valid(); It.Next(), ++cnt) {
diff --git a/ydb/core/blobstorage/vdisk/balance/utils.cpp b/ydb/core/blobstorage/vdisk/balance/utils.cpp
index 8c88b3955525..0a99ad83dd20 100644
--- a/ydb/core/blobstorage/vdisk/balance/utils.cpp
+++ b/ydb/core/blobstorage/vdisk/balance/utils.cpp
@@ -53,10 +53,11 @@ namespace NBalancing {
     }
 
     void TPartsCollectorMerger::AddFromFresh(const TMemRecLogoBlob& memRec, const TRope* data, const TKeyLogoBlob& key, ui64 /*lsn*/) {
+        Ingress.Merge(memRec.GetIngress());
+
         if (!memRec.HasData()) {
             return;
         }
-        Ingress.Merge(memRec.GetIngress());
 
         const NMatrix::TVectorType local = memRec.GetLocalParts(GType);