diff --git a/ydb/core/blobstorage/pdisk/blobstorage_pdisk_ut.cpp b/ydb/core/blobstorage/pdisk/blobstorage_pdisk_ut.cpp
index fe909c326832..59ecd2ba841f 100644
--- a/ydb/core/blobstorage/pdisk/blobstorage_pdisk_ut.cpp
+++ b/ydb/core/blobstorage/pdisk/blobstorage_pdisk_ut.cpp
@@ -1611,9 +1611,10 @@ Y_UNIT_TEST_SUITE(TPDiskTest) {
             UNIT_ASSERT(ConvertIPartsToString(parts.Get()) == res->Data.ToString().Slice());
         }
     }
+
     Y_UNIT_TEST(ChunkWriteDifferentOffsetAndSize) {
-        for (ui32 i = 0; i <= 3; ++i) {
-            ChunkWriteDifferentOffsetAndSizeImpl(i & 1, i & 2);
+        for (ui32 i = 0; i <= 1; ++i) {
+            ChunkWriteDifferentOffsetAndSizeImpl(i & 1, false);
         }
     }
 
@@ -3035,7 +3036,17 @@ Y_UNIT_TEST_SUITE(TPDiskPrefailureDiskTest) {
         pdt.Run();
     }
 }
-/*
+
+// RDMA use ibverbs shared library which is part of hardware vendor provided drivers and can't be linked staticaly
+// This library is not MSan-instrumented, so it causes msan fail if we run. So skip such run...
+static bool IsMsanEnabled() {
+#if defined(_msan_enabled_)
+    return true;
+#else
+    return false;
+#endif
+}
+
 Y_UNIT_TEST_SUITE(RDMA) {
     void TestChunkReadWithRdmaAllocator(bool plainDataChunks) {
         TActorTestContext testCtx({
@@ -3076,13 +3087,23 @@ Y_UNIT_TEST_SUITE(RDMA) {
     }
 
     Y_UNIT_TEST(TestChunkReadWithRdmaAllocatorEncryptedChunks) {
+        if (IsMsanEnabled())
+            return;
+
         TestChunkReadWithRdmaAllocator(false);
     }
+
     Y_UNIT_TEST(TestChunkReadWithRdmaAllocatorPlainChunks) {
+        if (IsMsanEnabled())
+            return;
+
         TestChunkReadWithRdmaAllocator(true);
     }
 
     Y_UNIT_TEST(TestRcBuf) {
+        if (IsMsanEnabled())
+            return;
+
         ui32 size = 129961;
         ui32 offset = 123;
         ui32 tailRoom = 1111;
@@ -3116,6 +3137,15 @@ Y_UNIT_TEST_SUITE(RDMA) {
         buf1.RawDataPtr(0, totalSize);
         buf2.RawDataPtr(0, totalSize);
     }
+
+    Y_UNIT_TEST(ChunkWriteDifferentOffsetAndSize) {
+        if (IsMsanEnabled())
+            return;
+
+        for (ui32 i = 0; i <= 1; ++i) {
+            NTestSuiteTPDiskTest::ChunkWriteDifferentOffsetAndSizeImpl(i & 1, true);
+        }
+    }
 }
-*/
+
 } // namespace NKikimr
diff --git a/ydb/library/actors/interconnect/rdma/link_manager.cpp b/ydb/library/actors/interconnect/rdma/link_manager.cpp
index 26d7763e41db..d34f4be41077 100644
--- a/ydb/library/actors/interconnect/rdma/link_manager.cpp
+++ b/ydb/library/actors/interconnect/rdma/link_manager.cpp
@@ -1,6 +1,7 @@
 #include "link_manager.h"
 #include "ctx.h"
 #include "ctx_impl.h"
+#include <mutex>
 
 #include <util/generic/scope.h>
 #include <util/generic/string.h>
@@ -60,10 +61,12 @@ static class TRdmaLinkManager {
             return;
         }
     }
-private:
-    TCtxsMap CtxMap;
 
     void ScanDevices() {
+        std::lock_guard<std::mutex> lock(Mtx);
+        if (Inited) {
+            return;
+        }
         int numDevices = 0;
         int err;
         ibv_device** deviceList = ibv_get_device_list(&numDevices);
@@ -130,10 +133,16 @@ static class TRdmaLinkManager {
                 }
             }
         }
+        Inited = true;
     }
 
+private:
+    TCtxsMap CtxMap;
     int ErrNo = 0;
     TString Err;
+    std::mutex Mtx;
+    bool Inited = false;
+
 
 } RdmaLinkManager;
 
@@ -159,4 +168,8 @@ const TCtxsMap& GetAllCtxs() {
     return RdmaLinkManager.GetAllCtxs();
 }
 
+void Init() {
+    RdmaLinkManager.ScanDevices();
+}
+
 } 
diff --git a/ydb/library/actors/interconnect/rdma/link_manager.h b/ydb/library/actors/interconnect/rdma/link_manager.h
index 03fc49e3eb1e..7d909fccda2f 100644
--- a/ydb/library/actors/interconnect/rdma/link_manager.h
+++ b/ydb/library/actors/interconnect/rdma/link_manager.h
@@ -44,5 +44,5 @@ using TCtxsMap = std::vector<std::pair<ibv_gid, std::shared_ptr<NInterconnect::N
 TRdmaCtx* GetCtx(int sockfd);
 TRdmaCtx* GetCtx(const in6_addr& );
 const TCtxsMap& GetAllCtxs();
-
+void Init();
 }
diff --git a/ydb/library/actors/interconnect/rdma/mem_pool.cpp b/ydb/library/actors/interconnect/rdma/mem_pool.cpp
index bc5fed8c97ca..d160d25f167c 100644
--- a/ydb/library/actors/interconnect/rdma/mem_pool.cpp
+++ b/ydb/library/actors/interconnect/rdma/mem_pool.cpp
@@ -316,10 +316,15 @@ namespace NInterconnect::NRdma {
         return counters;
     }
 
+    static const NInterconnect::NRdma::NLinkMgr::TCtxsMap& GetAllCtxs() {
+        NInterconnect::NRdma::NLinkMgr::Init();
+        return NInterconnect::NRdma::NLinkMgr::GetAllCtxs();
+    }
+
     class TMemPoolBase: public IMemPool {
     public:
         TMemPoolBase(size_t maxChunk, NMonitoring::TDynamicCounterPtr counter)
-            : Ctxs(NInterconnect::NRdma::NLinkMgr::GetAllCtxs())
+            : Ctxs(GetAllCtxs())
             , MaxChunk(maxChunk)
             , Alignment(NSystemInfo::GetPageSize())
         {
diff --git a/ydb/library/actors/interconnect/rdma/ya.make b/ydb/library/actors/interconnect/rdma/ya.make
index 1c0a3a427c54..08e9616fe981 100644
--- a/ydb/library/actors/interconnect/rdma/ya.make
+++ b/ydb/library/actors/interconnect/rdma/ya.make
@@ -35,6 +35,6 @@ RECURSE(
     cq_actor
 )
 
-#RECURSE_FOR_TESTS(
-#    ut
-#)
+RECURSE_FOR_TESTS(
+    ut
+)