lbasize_t
lbasize_t block_count; /* no of blocks */
ub_dev_read(int handle, void *buf, lbasize_t len, lbastart_t start,
lbasize_t *rlen)
lbasize_t act_len;
int ub_dev_read(int, void *, lbasize_t, lbastart_t, lbasize_t *);
lbasize_t real_size;