diff --git a/Makefile.am b/Makefile.am
index 07afcda..7f162bc 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -152,7 +152,8 @@ bin_iscsi_test_SOURCES = test-tool/iscsi-test.c \
 	test-tool/1041_unsolicited_immediate_data.c \
 	test-tool/1042_unsolicited_nonimmediate_data.c \
 	test-tool/1100_persistent_reserve_in_read_keys_simple.c \
-	test-tool/1110_persistent_reserve_in_serviceaction_range.c
+	test-tool/1110_persistent_reserve_in_serviceaction_range.c \
+	test-tool/1120_persistent_reserve_out_clear_simple.c
 
 endif
 
diff --git a/include/iscsi.h b/include/iscsi.h
index cff3e02..c9e6ded 100644
--- a/include/iscsi.h
+++ b/include/iscsi.h
@@ -778,6 +778,11 @@ iscsi_persistent_reserve_in_task(struct iscsi_context *iscsi, int lun,
 				 int sa, uint16_t xferlen,
 				 iscsi_command_cb cb, void *private_data);
 
+EXTERN struct scsi_task *
+iscsi_persistent_reserve_out_task(struct iscsi_context *iscsi, int lun,
+				  int sa, int scope, int type, void *params,
+				  iscsi_command_cb cb, void *private_data);
+
 EXTERN struct scsi_task *
 iscsi_unmap_task(struct iscsi_context *iscsi, int lun, int anchor, int group,
 		 struct unmap_list *list, int list_len,
@@ -953,6 +958,11 @@ iscsi_writesame16_sync(struct iscsi_context *iscsi, int lun,
 EXTERN struct scsi_task *
 iscsi_persistent_reserve_in_sync(struct iscsi_context *iscsi, int lun,
 				 int sa, uint16_t xferlen);
+
+EXTERN struct scsi_task *
+iscsi_persistent_reserve_out_sync(struct iscsi_context *iscsi, int lun,
+				  int sa, int scope, int type, void *params);
+
 EXTERN struct scsi_task *
 iscsi_unmap_sync(struct iscsi_context *iscsi, int lun, int anchor, int group,
 		 struct unmap_list *list, int list_len);
diff --git a/include/scsi-lowlevel.h b/include/scsi-lowlevel.h
index 27b7ae4..8340746 100644
--- a/include/scsi-lowlevel.h
+++ b/include/scsi-lowlevel.h
@@ -48,7 +48,8 @@ enum scsi_opcode {
 	SCSI_OPCODE_WRITE_SAME10       = 0x41,
 	SCSI_OPCODE_UNMAP              = 0x42,
 	SCSI_OPCODE_READTOC            = 0x43,
-	SCSI_OPCODE_PERSISTENT_RESERVE_IN = 0x5E,
+	SCSI_OPCODE_PERSISTENT_RESERVE_IN  = 0x5E,
+	SCSI_OPCODE_PERSISTENT_RESERVE_OUT = 0x5F,
 	SCSI_OPCODE_READ16             = 0x88,
 	SCSI_OPCODE_COMPARE_AND_WRITE  = 0x89,
 	SCSI_OPCODE_WRITE16            = 0x8A,
@@ -79,6 +80,38 @@ enum scsi_service_action_in {
 	SCSI_GET_LBA_STATUS            = 0x12
 };
 
+enum scsi_persistent_out_sa {
+	SCSI_PERSISTENT_RESERVE_REGISTER		= 0,
+	SCSI_PERSISTENT_RESERVE_RESERVE			= 1,
+	SCSI_PERSISTENT_RESERVE_RELEASE			= 2,
+	SCSI_PERSISTENT_RESERVE_CLEAR			= 3,
+	SCSI_PERSISTENT_RESERVE_PREEMPT			= 4,
+	SCSI_PERSISTENT_RESERVE_PREEMPT_AND_ABORT	= 5,
+	SCSI_PERSISTENT_RESERVE_REGISTER_AND_IGNORE_EXISTING_KEY = 6,
+	SCSI_PERSISTENT_RESERVE_REGISTER_AND_MOVE	= 7
+};
+
+enum scsi_persistent_out_scope {
+	SCSI_PERSISTENT_RESERVE_SCOPE_LU		= 0
+};
+
+enum scsi_persistent_out_type {
+	SCSI_PERSISTENT_RESERVE_TYPE_WRITE_EXCLUSIVE			= 1,
+	SCSI_PERSISTENT_RESERVE_TYPE_EXCLUSIVE_ACCESS			= 3,
+	SCSI_PERSISTENT_RESERVE_TYPE_WRITE_EXCLUSIVE_REGISTRANTS_ONLY	= 5,
+	SCSI_PERSISTENT_RESERVE_TYPE_EXCLUSIVE_ACCESS_REGISTRANTS_ONLY	= 6,
+	SCSI_PERSISTENT_RESERVE_TYPE_WRITE_EXCLUSIVE_ALL_REGISTRANTS	= 7,
+	SCSI_PERSISTENT_RESERVE_TYPE_EXCLUSIVE_ACCESS_ALL_REGISTRANTS	= 8
+};
+
+struct scsi_persistent_reserve_out_basic {
+       uint64_t	reservation_key;
+       uint64_t	service_action_reservation_key;
+       uint8_t  spec_i_pt;
+       uint8_t  all_tg_pt;
+       uint8_t  aptpl;
+};
+
 enum scsi_maintenance_in {
 	SCSI_REPORT_SUPPORTED_OP_CODES = 0x0c
 };
@@ -146,7 +179,7 @@ enum scsi_readtoc_fmt {
 	SCSI_READ_PMA          = 3,
 	SCSI_READ_ATIP         = 4
 };
-struct scsi_readtoc_desc{
+struct scsi_readtoc_desc {
 	union {
 		struct scsi_toc_desc {
 			int adr;
@@ -735,6 +768,7 @@ EXTERN struct scsi_task *scsi_cdb_readcapacity16(void);
 EXTERN struct scsi_task *scsi_cdb_get_lba_status(uint64_t starting_lba, uint32_t alloc_len);
 EXTERN struct scsi_task *scsi_cdb_unmap(int anchor, int group, uint16_t xferlen);
 EXTERN struct scsi_task *scsi_cdb_persistent_reserve_in(enum scsi_persistent_in_sa sa, uint16_t xferlen);
+EXTERN struct scsi_task *scsi_cdb_persistent_reserve_out(enum scsi_persistent_out_sa sa, enum scsi_persistent_out_scope scope, enum scsi_persistent_out_type type, void *params);
 EXTERN struct scsi_task *scsi_cdb_writesame10(int wrprotect, int anchor, int unmap, int pbdata, int lbdata, uint32_t lba, int group, uint16_t num_blocks);
 EXTERN struct scsi_task *scsi_cdb_writesame16(int wrprotect, int anchor, int unmap, int pbdata, int lbdata, uint64_t lba, int group, uint32_t num_blocks);
 EXTERN struct scsi_task *scsi_cdb_prefetch10(uint32_t lba, int num_blocks, int immed, int group);
diff --git a/lib/iscsi-command.c b/lib/iscsi-command.c
index a9fd53f..06d7d66 100644
--- a/lib/iscsi-command.c
+++ b/lib/iscsi-command.c
@@ -1276,6 +1276,28 @@ iscsi_persistent_reserve_in_task(struct iscsi_context *iscsi, int lun,
 	return task;
 }
 
+struct scsi_task *
+iscsi_persistent_reserve_out_task(struct iscsi_context *iscsi, int lun,
+				  int sa, int scope, int type, void *param,
+				  iscsi_command_cb cb, void *private_data)
+{
+	struct scsi_task *task;
+
+	task = scsi_cdb_persistent_reserve_out(sa, scope, type, param);
+	if (task == NULL) {
+		iscsi_set_error(iscsi, "Out-of-memory: Failed to create "
+				"persistent-reserver-out cdb.");
+		return NULL;
+	}
+	if (iscsi_scsi_command_async(iscsi, lun, task, cb,
+				     NULL, private_data) != 0) {
+		scsi_free_scsi_task(task);
+		return NULL;
+	}
+
+	return task;
+}
+
 struct scsi_task *
 iscsi_prefetch10_task(struct iscsi_context *iscsi, int lun, uint32_t lba,
 		      int num_blocks, int immed, int group,
diff --git a/lib/libiscsi.def b/lib/libiscsi.def
index 788fbfe..127c611 100644
--- a/lib/libiscsi.def
+++ b/lib/libiscsi.def
@@ -30,6 +30,8 @@ iscsi_parse_full_url
 iscsi_parse_portal_url
 iscsi_persistent_reserve_in_task
 iscsi_persistent_reserve_in_sync
+iscsi_persistent_reserve_out_task
+iscsi_persistent_reserve_out_sync
 iscsi_prefetch10_sync
 iscsi_prefetch10_task
 iscsi_prefetch16_sync
@@ -136,6 +138,7 @@ scsi_cdb_inquiry
 scsi_cdb_get_lba_status
 scsi_cdb_modesense6
 scsi_cdb_persistent_reserve_in
+scsi_cdb_persistent_reserve_out
 scsi_cdb_prefetch10
 scsi_cdb_prefetch16
 scsi_cdb_preventallow
diff --git a/lib/libiscsi.syms b/lib/libiscsi.syms
index b79242e..1a723e1 100644
--- a/lib/libiscsi.syms
+++ b/lib/libiscsi.syms
@@ -28,6 +28,8 @@ iscsi_parse_full_url
 iscsi_parse_portal_url
 iscsi_persistent_reserve_in_task
 iscsi_persistent_reserve_in_sync
+iscsi_persistent_reserve_out_task
+iscsi_persistent_reserve_out_sync
 iscsi_prefetch10_sync
 iscsi_prefetch10_task
 iscsi_prefetch16_sync
@@ -134,6 +136,7 @@ scsi_cdb_inquiry
 scsi_cdb_get_lba_status
 scsi_cdb_modesense6
 scsi_cdb_persistent_reserve_in
+scsi_cdb_persistent_reserve_out
 scsi_cdb_prefetch10
 scsi_cdb_prefetch16
 scsi_cdb_preventallow
diff --git a/lib/scsi-lowlevel.c b/lib/scsi-lowlevel.c
index 2276a9a..7602e87 100644
--- a/lib/scsi-lowlevel.c
+++ b/lib/scsi-lowlevel.c
@@ -38,6 +38,8 @@
 #include "slist.h"
 #include "scsi-lowlevel.h"
 
+void scsi_task_set_iov_out(struct scsi_task *task, struct scsi_iovec *iov, int niov);
+
 struct scsi_allocated_memory {
 	struct scsi_allocated_memory *next;
 	char buf[0];
@@ -186,6 +188,19 @@ scsi_get_uint16(const unsigned char *c)
 	return ntohs(*(uint16_t *)c);
 }
 
+inline void
+scsi_set_uint64(unsigned char *c, uint64_t v)
+{
+	uint32_t val;
+
+	val = (v >> 32) & 0xffffffff;
+	*(uint32_t *)c = htonl(val);
+
+	c += 4;
+	val = v & 0xffffffff;
+	*(uint32_t *)c = htonl(val);
+}
+
 inline void
 scsi_set_uint32(unsigned char *c, uint32_t val)
 {
@@ -1702,6 +1717,91 @@ scsi_cdb_persistent_reserve_in(enum scsi_persistent_in_sa sa, uint16_t xferlen)
 	return task;
 }
 
+/*
+ * PERSISTENT_RESERVE_OUT
+ */
+struct scsi_task *
+scsi_cdb_persistent_reserve_out(enum scsi_persistent_out_sa sa, enum scsi_persistent_out_scope scope, enum scsi_persistent_out_type type, void *param)
+{
+	struct scsi_task *task;
+	struct scsi_persistent_reserve_out_basic *basic;
+	struct scsi_iovec *iov;
+	unsigned char *buf;
+	int xferlen;
+
+	task = malloc(sizeof(struct scsi_task));
+	if (task == NULL) {
+		return NULL;
+	}
+
+	iov = scsi_malloc(task, sizeof(struct scsi_iovec));
+	if (iov == NULL) {
+		free(task);
+		return NULL;
+	}
+
+	switch(sa) {
+	case SCSI_PERSISTENT_RESERVE_REGISTER:
+	case SCSI_PERSISTENT_RESERVE_RESERVE:
+	case SCSI_PERSISTENT_RESERVE_RELEASE:
+	case SCSI_PERSISTENT_RESERVE_CLEAR:
+	case SCSI_PERSISTENT_RESERVE_PREEMPT:
+	case SCSI_PERSISTENT_RESERVE_PREEMPT_AND_ABORT:
+	case SCSI_PERSISTENT_RESERVE_REGISTER_AND_IGNORE_EXISTING_KEY:
+		basic = param;
+
+		xferlen = 24;
+		buf = scsi_malloc(task, xferlen);
+		if (buf == NULL) {
+			free(task);
+			free(iov);
+			return NULL;
+		}
+		
+		memset(buf, 0, xferlen);
+		scsi_set_uint64(&buf[0], basic->reservation_key);
+		scsi_set_uint64(&buf[8], basic->service_action_reservation_key);
+		if (basic->spec_i_pt) {
+			buf[20] |= 0x08;
+		}
+		if (basic->all_tg_pt) {
+			buf[20] |= 0x04;
+		}
+		if (basic->aptpl) {
+			buf[20] |= 0x01;
+		}
+		break;
+	case SCSI_PERSISTENT_RESERVE_REGISTER_AND_MOVE:
+		/* XXX FIXME */
+		free(task);
+		free(iov);
+		return NULL;
+	default:
+		free(task);
+		free(iov);
+		return NULL;
+	}
+
+
+	memset(task, 0, sizeof(struct scsi_task));
+	task->cdb[0]   = SCSI_OPCODE_PERSISTENT_RESERVE_OUT;
+
+	task->cdb[1] |= sa & 0x1f;
+	task->cdb[2] = ((scope << 4) & 0xf0) | (type & 0x0f);
+	
+	scsi_set_uint32(&task->cdb[5], xferlen);
+
+	task->cdb_size = 10;
+	task->xfer_dir = SCSI_XFER_WRITE;
+	task->expxferlen = xferlen;
+
+	iov->iov_base = buf;
+	iov->iov_len  = xferlen;
+	scsi_task_set_iov_out(task, iov, 1);
+
+	return task;
+}
+
 /*
  * WRITE_SAME10
  */
diff --git a/lib/sync.c b/lib/sync.c
index ece187e..20b572a 100644
--- a/lib/sync.c
+++ b/lib/sync.c
@@ -818,6 +818,27 @@ iscsi_persistent_reserve_in_sync(struct iscsi_context *iscsi, int lun,
 	return state.task;
 }
 
+struct scsi_task *
+iscsi_persistent_reserve_out_sync(struct iscsi_context *iscsi, int lun,
+				  int sa, int scope, int type, void *param)
+{
+	struct iscsi_sync_state state;
+
+	memset(&state, 0, sizeof(state));
+
+	if (iscsi_persistent_reserve_out_task(iscsi, lun,
+					      sa, scope, type, param,
+					      scsi_sync_cb, &state) == NULL) {
+		iscsi_set_error(iscsi,
+				"Failed to send PERSISTENT_RESERVE_OUT command");
+		return NULL;
+	}
+
+	event_loop(iscsi, &state);
+
+	return state.task;
+}
+
 struct scsi_task *
 iscsi_unmap_sync(struct iscsi_context *iscsi, int lun, int anchor, int group,
 		 struct unmap_list *list, int list_len)
diff --git a/test-tool/1120_persistent_reserve_out_clear_simple.c b/test-tool/1120_persistent_reserve_out_clear_simple.c
new file mode 100644
index 0000000..a32297f
--- /dev/null
+++ b/test-tool/1120_persistent_reserve_out_clear_simple.c
@@ -0,0 +1,97 @@
+/* 
+   Copyright (C) 2012 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdio.h>
+#include <arpa/inet.h>
+#include "iscsi.h"
+#include "scsi-lowlevel.h"
+#include "iscsi-test.h"
+
+int T1120_persistent_reserve_out_clear_simple(const char *initiator, const char *url, int data_loss _U_, int show_info)
+{ 
+	struct iscsi_context *iscsi;
+	struct scsi_task *task;
+	struct scsi_persistent_reserve_out_basic poc;
+	int ret, lun;
+
+	printf("1120_persistent_reserve_out_clear_simple:\n");
+	printf("============================================\n");
+	if (show_info) {
+		printf("Test basic PERSISTENT_RESERVE_OUT/CLEAR functionality.\n");
+		printf("1, Verify that CLEAR works.\n"),
+		printf("\n");
+		return 0;
+	}
+
+	iscsi = iscsi_context_login(initiator, url, &lun);
+	if (iscsi == NULL) {
+		printf("Failed to login to target\n");
+		return -1;
+	}
+
+	if (!data_loss) {
+		printf("--dataloss flag is not set. Skipping test\n");
+		ret = -2;
+		goto finished;
+	}
+	
+	ret = 0;
+
+	/* Verify that PERSISTENT_RESERVE_OUT/CLEAR works */
+	printf("Send PERSISTENT_RESERVE_OUT/CLEAR ... ");
+	poc.reservation_key			= 1L;
+	poc.service_action_reservation_key	= 2L;
+	poc.spec_i_pt				= 0;
+	poc.all_tg_pt				= 1;
+	poc.aptpl				= 1;
+	task = iscsi_persistent_reserve_out_sync(iscsi, lun,
+			SCSI_PERSISTENT_RESERVE_CLEAR,
+			SCSI_PERSISTENT_RESERVE_SCOPE_LU,
+			SCSI_PERSISTENT_RESERVE_TYPE_WRITE_EXCLUSIVE,
+			&poc);
+	if (task == NULL) {
+	        printf("[FAILED]\n");
+		printf("Failed to send PERSISTENT_RESERVE_OUT command: %s\n", iscsi_get_error(iscsi));
+		ret = -1;
+		goto finished;
+	}
+	if (task->status == SCSI_STATUS_CHECK_CONDITION
+	    && task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST
+	    && task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE) {
+		printf("[SKIPPED]\n");
+		printf("PERSISTENT_RESERVE_OUT Not Supported\n");
+		ret = -2;
+		scsi_free_scsi_task(task);
+		goto finished;
+	}
+	if (task->status != SCSI_STATUS_GOOD) {
+	        printf("[FAILED]\n");
+		printf("PERSISTENT_RESERVE_OUT command: failed with sense. %s\n", iscsi_get_error(iscsi));
+		ret = -1;
+		scsi_free_scsi_task(task);
+		goto finished;
+	}
+	scsi_free_scsi_task(task);
+	printf("[OK]\n");
+
+
+
+finished:
+	iscsi_logout_sync(iscsi);
+	iscsi_destroy_context(iscsi);
+	return ret;
+}
diff --git a/test-tool/iscsi-test.c b/test-tool/iscsi-test.c
index ab979ed..cb587bd 100644
--- a/test-tool/iscsi-test.c
+++ b/test-tool/iscsi-test.c
@@ -256,6 +256,7 @@ struct scsi_test tests[] = {
 /* PERSISTENT_RESERVE_IN */
 { "T1100_persistent_reserve_in_read_keys_simple", T1100_persistent_reserve_in_read_keys_simple },
 { "T1110_persistent_reserve_in_serviceaction_range", T1110_persistent_reserve_in_serviceaction_range },
+{ "T1120_persistent_reserve_out_clear_simple", T1120_persistent_reserve_out_clear_simple },
 
 { NULL, NULL }
 };
diff --git a/test-tool/iscsi-test.h b/test-tool/iscsi-test.h
index 9b97474..33e3263 100644
--- a/test-tool/iscsi-test.h
+++ b/test-tool/iscsi-test.h
@@ -187,3 +187,4 @@ int T1041_unsolicited_immediate_data(const char *initiator, const char *url, int
 int T1042_unsolicited_nonimmediate_data(const char *initiator, const char *url, int data_loss, int show_info);
 int T1100_persistent_reserve_in_read_keys_simple(const char *initiator, const char *url, int data_loss, int show_info);
 int T1110_persistent_reserve_in_serviceaction_range(const char *initiator, const char *url, int data_loss, int show_info);
+int T1120_persistent_reserve_out_clear_simple(const char *initiator, const char *url, int data_loss, int show_info);