diff --git a/common/cmd_ubi.c b/common/cmd_ubi.c
index f11cb61..122ba7e 100644
--- a/common/cmd_ubi.c
+++ b/common/cmd_ubi.c
@@ -266,28 +266,15 @@ out_err:
 	return err;
 }
 
-int ubi_volume_write(char *volume, void *buf, size_t size)
+int ubi_volume_continue_write(char *volume, void *buf, size_t size)
 {
 	int err = 1;
-	int rsvd_bytes = 0;
 	struct ubi_volume *vol;
 
 	vol = ubi_find_volume(volume);
 	if (vol == NULL)
 		return ENODEV;
 
-	rsvd_bytes = vol->reserved_pebs * (ubi->leb_size - vol->data_pad);
-	if (size < 0 || size > rsvd_bytes) {
-		printf("size > volume size! Aborting!\n");
-		return EINVAL;
-	}
-
-	err = ubi_start_update(ubi, vol, size);
-	if (err < 0) {
-		printf("Cannot start volume update\n");
-		return -err;
-	}
-
 	err = ubi_more_update_data(ubi, vol, buf, size);
 	if (err < 0) {
 		printf("Couldnt or partially wrote data\n");
@@ -314,6 +301,37 @@ int ubi_volume_write(char *volume, void *buf, size_t size)
 	return 0;
 }
 
+int ubi_volume_begin_write(char *volume, void *buf, size_t size,
+	size_t full_size)
+{
+	int err = 1;
+	int rsvd_bytes = 0;
+	struct ubi_volume *vol;
+
+	vol = ubi_find_volume(volume);
+	if (vol == NULL)
+		return ENODEV;
+
+	rsvd_bytes = vol->reserved_pebs * (ubi->leb_size - vol->data_pad);
+	if (size < 0 || size > rsvd_bytes) {
+		printf("size > volume size! Aborting!\n");
+		return EINVAL;
+	}
+
+	err = ubi_start_update(ubi, vol, full_size);
+	if (err < 0) {
+		printf("Cannot start volume update\n");
+		return -err;
+	}
+
+	return ubi_volume_continue_write(volume, buf, size);
+}
+
+int ubi_volume_write(char *volume, void *buf, size_t size)
+{
+	return ubi_volume_begin_write(volume, buf, size, size);
+}
+
 int ubi_volume_read(char *volume, char *buf, size_t size)
 {
 	int err, lnum, off, len, tbuf_size;
@@ -588,7 +606,20 @@ static int do_ubi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 		addr = simple_strtoul(argv[2], NULL, 16);
 		size = simple_strtoul(argv[4], NULL, 16);
 
-		ret = ubi_volume_write(argv[3], (void *)addr, size);
+		if (strlen(argv[1]) == 10 &&
+		    strncmp(argv[1] + 5, ".part", 5) == 0) {
+			if (argc < 6) {
+				ret = ubi_volume_continue_write(argv[3],
+						(void *)addr, size);
+			} else {
+				size_t full_size;
+				full_size = simple_strtoul(argv[5], NULL, 16);
+				ret = ubi_volume_begin_write(argv[3],
+						(void *)addr, size, full_size);
+			}
+		} else {
+			ret = ubi_volume_write(argv[3], (void *)addr, size);
+		}
 		if (!ret) {
 			printf("%lld bytes written to volume %s\n", size,
 			       argv[3]);
@@ -636,6 +667,8 @@ U_BOOT_CMD(
 		" - create volume name with size\n"
 	"ubi write[vol] address volume size"
 		" - Write volume from address with size\n"
+	"ubi write.part address volume size [fullsize]\n"
+		" - Write part of a volume from address\n"
 	"ubi read[vol] address volume [size]"
 		" - Read volume to address with size\n"
 	"ubi remove[vol] volume"
diff --git a/doc/README.ubi b/doc/README.ubi
index 3cf4ef2..d82c75c 100644
--- a/doc/README.ubi
+++ b/doc/README.ubi
@@ -14,6 +14,8 @@ ubi part [part] [offset]
 ubi info [l[ayout]] - Display volume and ubi layout information
 ubi create[vol] volume [size] [type] - create volume name with size
 ubi write[vol] address volume size - Write volume from address with size
+ubi write.part address volume size [fullsize]
+ - Write part of a volume from address
 ubi read[vol] address volume [size] - Read volume to address with size
 ubi remove[vol] volume - Remove volume
 [Legends]
@@ -77,6 +79,7 @@ ubi createvol	Create UBI volume on UBI device
 ubi removevol	Remove UBI volume from UBI device
 ubi read	Read data from UBI volume to memory
 ubi write	Write data from memory to UBI volume
+ubi write.part	Write data from memory to UBI volume, in parts
 
 
 Here a few examples on the usage: