diff --git a/ChangeLog b/ChangeLog
index 9c5db9396e51169f5d1b87c27cca624a7e2ed804..2d3fe76740b492dcd3e724ef8c0a06780897e6a6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+Wed Sep 16 2020 Piotr Balcer <piotr.balcer@intel.com>
+
+	* Version 1.9.1
+
+	Detailed list of bug fixes:
+	- common: fix LIBFABRIC flags
+	- common: Add runtime SDS check and disable
+	- pool: disable SDS check if not supported
+	- obj: fix failure atomicity bug in huge allocs
+	- obj: add missing drain after ulog processing
+
 Fri Jul 3 2020 Piotr Balcer <piotr.balcer@intel.com>
 
 	* Version 1.9
diff --git a/README.md b/README.md
index b5271c3abf373119f201e801e0c317ae4093149c..38fcf895254d71e8ba7d44f46d1455333dada34f 100644
--- a/README.md
+++ b/README.md
@@ -167,7 +167,7 @@ To build from source, clone this tree:
 
 For a stable version, checkout a [release tag](https://github.com/pmem/pmdk/releases) as follows. Otherwise skip this step to build the latest development release.
 ```
-	$ git checkout tags/1.9
+	$ git checkout tags/1.9.1
 ```
 
 Once the build system is setup, the Persistent Memory Development Kit is built using the `make` command at the top level:
diff --git a/src/libpmempool/check_sds.c b/src/libpmempool/check_sds.c
index 8685ef97a9aef84f29b92e2dfd4b6099661b1777..3eaf7414b787bcf5493c76d045eebe048918130f 100644
--- a/src/libpmempool/check_sds.c
+++ b/src/libpmempool/check_sds.c
@@ -26,7 +26,6 @@ enum question {
 #define SDS_CHECK_STR	"checking shutdown state"
 #define SDS_OK_STR	"shutdown state correct"
 #define SDS_DIRTY_STR	"shutdown state is dirty"
-#define SDS_NOT_SUPP	"shutdown state not supported"
 
 #define ADR_FAILURE_STR \
 	"an ADR failure was detected - your pool might be corrupted"
@@ -47,22 +46,6 @@ enum question {
 		? SDS_DIRTY_STR ".|" ZERO_SDS_STR \
 		: ADR_FAILURE_STR ".|" RESET_SDS_STR
 
-/*
- *
- */
-static int
-sds_is_supported(location *loc)
-{
-	LOG(3, NULL);
-
-	ASSERTne(loc, NULL);
-	struct pool_replica *rep = REP(loc->set, 0);
-	ASSERTne(rep, NULL);
-	ASSERTne(PART(rep, 0)->fd, 0);
-
-	return shutdown_state_is_supported(PART(rep, 0)->fd);
-}
-
 /*
  * sds_check_replica -- (internal) check if replica is healthy
  */
@@ -106,13 +89,6 @@ sds_check(PMEMpoolcheck *ppc, location *loc)
 
 	CHECK_INFO(ppc, "%s" SDS_CHECK_STR, loc->prefix);
 
-	/* shutdown state is supported */
-	if (sds_is_supported(loc)) {
-		CHECK_INFO(ppc, "%s" SDS_NOT_SUPP, loc->prefix);
-		loc->step = CHECK_STEP_COMPLETE;
-		return 0;
-	}
-
 	/* shutdown state is valid */
 	if (!sds_check_replica(loc)) {
 		CHECK_INFO(ppc, "%s" SDS_OK_STR, loc->prefix);
@@ -276,12 +252,6 @@ check_sds(PMEMpoolcheck *ppc)
 	/* initialize replica 0 for sds check */
 	loc->replica = 0;
 	init_location_data(ppc, loc);
-	if (!sds_is_supported(loc)) {
-		CHECK_INFO(ppc, "%s" SDS_CHECK_STR,
-				loc->prefix);
-		CHECK_INFO(ppc, "%s" SDS_NOT_SUPP, loc->prefix);
-		return;
-	}
 
 	if (!loc->init_done) {
 		sds_get_healthy_replicas_num(ppc, loc);
diff --git a/src/test/pmempool_check/TEST1.PS1 b/src/test/pmempool_check/TEST1.PS1
index cf1aba5bb10a878f54f24e273e9a2a8473605807..56bc1d9789bb4dd5ba8f9998b44d6ff61aa353ba 100644
--- a/src/test/pmempool_check/TEST1.PS1
+++ b/src/test/pmempool_check/TEST1.PS1
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: BSD-3-Clause
-# Copyright 2014-2019, Intel Corporation
+# Copyright 2014-2020, Intel Corporation
 #
 #
 # pmempool_check/TEST1 -- test for checking pools
@@ -20,7 +20,7 @@ echo "PMEMLOG: pool_hdr" > $LOG
 expect_normal_exit $PMEMPOOL create log $POOL
 check_file $POOL
 
-Invoke-Expression "$PMEMSPOIL -v $POOL pool_hdr.major=0x0 pool_hdr.features.compat=0xfe pool_hdr.features.incompat=0xfe pool_hdr.features.ro_compat=0xfb pool_hdr.shutdown_state.usc=0 pool_hdr.shutdown_state.uuid=0 'pool_hdr.shutdown_state.f:checksum_gen' pool_hdr.unused=ERROR >> $LOG"
+Invoke-Expression "$PMEMSPOIL -v $POOL pool_hdr.major=0x0 pool_hdr.features.compat=0xfe pool_hdr.features.incompat=0xfb pool_hdr.features.ro_compat=0xff pool_hdr.shutdown_state.usc=0 pool_hdr.shutdown_state.uuid=0 'pool_hdr.shutdown_state.f:checksum_gen' pool_hdr.unused=ERROR >> $LOG"
 expect_normal_exit $PMEMPOOL check -vry $POOL >> $LOG
 
 echo "PMEMLOG: pmemlog" >> $LOG
diff --git a/src/test/pmempool_check/TEST9.PS1 b/src/test/pmempool_check/TEST9.PS1
index 92bc34c8eef385546d9cf3ed9d684ee909cb15fd..1d1e2ef3f11b38abbcf354336c390900b23796fe 100644
--- a/src/test/pmempool_check/TEST9.PS1
+++ b/src/test/pmempool_check/TEST9.PS1
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: BSD-3-Clause
-# Copyright 2017-2019, Intel Corporation
+# Copyright 2017-2020, Intel Corporation
 #
 # pmempool_check/TEST9 -- test for checking pmemobj pool
 #
@@ -23,7 +23,7 @@ expect_normal_exit $PMEMPOOL check -vyr $POOL >> $LOG
 &$PMEMSPOIL -v $POOL `
 	pool_hdr.major=0x0 `
 	pool_hdr.features.compat=0xfe `
-	pool_hdr.features.incompat=0xfe `
+	pool_hdr.features.incompat=0xfb `
 	pool_hdr.features.ro_compat=0xff `
 	pool_hdr.shutdown_state.usc=0 `
 	pool_hdr.shutdown_state.uuid=0 `
diff --git a/src/test/pmempool_feature/common.sh b/src/test/pmempool_feature/common.sh
index afdcfe9b08b2d109b488b3600d93ebb938614007..7a2c32130fcd4e0e92b0980f9fa926a49617865f 100644
--- a/src/test/pmempool_feature/common.sh
+++ b/src/test/pmempool_feature/common.sh
@@ -154,8 +154,8 @@ function pmempool_feature_test_SHUTDOWN_STATE() {
 
 	# If SDS is not enabled at this point is because SDS is not available for
 	# this device
-	pmempool_feature_query_return "SHUTDOWN_STATE"
-	if [[ $? -eq 0 ]]; then
+	ret=$(pmempool_feature_query_return "SHUTDOWN_STATE")
+	if [[ $ret -eq 0 ]]; then
 		msg "$UNITTEST_NAME: SKIP: SDS is not available"
 		exit 0
 	fi