scsi_read
if (scsi_read( 0, lbl_buff, LABEL_SIZE)) {
if (scsi_read(i, lbl_buff, BLOCK_SIZE) == 0)
if (scsi_read(32, lbl_buff, BLOCK_SIZE) == 0) {
int scsi_read(u_int, uint8_t *, u_int);
stat = scsi_read(buf, reqcnt, blk, nblk);
int scsi_read(uint8_t *, size_t, daddr_t, size_t);