BUF_SECTS
max_sectors = BUF_SECTS;
max_sectors = BUF_SECTS;
scan_size = BUF_SECTS;
cur_buf = (void *) zalloc(BUF_SECTS * cur_blksz);
pattern_buf = (void *) zalloc(BUF_SECTS * cur_blksz);
ioparam.io_bounds.upper = min(size, BUF_SECTS);