diff --git a/lib/bdev/bdev.c b/lib/bdev/bdev.c
index ce4971138..50c08fffa 100644
--- a/lib/bdev/bdev.c
+++ b/lib/bdev/bdev.c
@@ -4707,20 +4707,18 @@ spdk_bdev_is_dif_check_enabled(const struct spdk_bdev *bdev,
 uint32_t
 spdk_bdev_get_max_copy(const struct spdk_bdev *bdev)
 {
-	uint64_t alighed_length;
+	uint64_t aligned_length;
 	uint64_t max_copy_blocks;
-	uint64_t temp_max_copy_blocks;
 	struct spdk_iobuf_opts opts;
 
 	if (spdk_bdev_io_type_supported((struct spdk_bdev *)bdev, SPDK_BDEV_IO_TYPE_COPY)) {
 		return bdev->max_copy;
 	} else {
 		spdk_iobuf_get_opts(&opts);
-		alighed_length = opts.large_bufsize - spdk_bdev_get_buf_align(bdev);
-		temp_max_copy_blocks = spdk_bdev_is_md_separate(bdev) ?
-				       alighed_length / (bdev->blocklen + bdev->md_len) :
-				       alighed_length / bdev->blocklen;
-		max_copy_blocks = 1 << spdk_u64log2(temp_max_copy_blocks);
+		aligned_length = opts.large_bufsize - (spdk_bdev_get_buf_align(bdev) - 1);
+		max_copy_blocks = aligned_length / _bdev_get_block_size_with_md(bdev);
+		max_copy_blocks -= max_copy_blocks % bdev->write_unit_size;
+
 		return max_copy_blocks;
 	}
 }