ONE_MEG
*nlimit = (long) (atof(rest) * ONE_MEG);
if (bp->b_bcount > (10 * ONE_MEG))
tval *= bp->b_bcount/(10 * ONE_MEG);
#define READ_SOFT_ERROR_WARNING_THRESHOLD (25 * ONE_MEG)
#define WRITE_SOFT_ERROR_WARNING_THRESHOLD (20 * ONE_MEG)
#define EXABYTE_MIN_TRANSFER (25 * ONE_MEG)