On Monday 09 December 2002 11:29, William Blunn wrote: > > I think hardisk manufacturers use base 10, rather than base 2, > > when they speak of "mega" and "giga", ie. mega = 1000K and not > > 1024K. That means that a 120G hardisk is only 114.4G. > > No. > > You are right in that "mega = 1000K", but from your figure of 114.4, you > still appear to have "K = 1024" and "G = 1024M", both of which are > wrong. > I had G=1000, M=1000 and K=1024 which would give 120 x 10^6 x 1024 =114.4KiB. I stand corrected on the matter of me saying/implying K=1024. I am glad to hear that symbols have been defined for the base 2 multipliers. I shall try to use them. I seem to remember reading somthing about it sometime ago. Didn't someone propose to use something like KK, MM and GG, too. When I tell some people that, even when it comes to computers, the multiplier "kilo" formally, if not in practice, means "x 1000" they just won't believe me. > Hard disk manufacturers use SI defined multipliers, i.e. they use a > documented standard. > > K = 10^3 > M = 10^6 > G = 10^9 > > 120 GB = 120 000 000 000 B > > Computer people have traditionally abused these symbols to mean > multipliers with similar values, but based on powers of two. > > Symbols have been defined for these multipliers, but some people still > haven't caught up to them. > > Ki = 2^10 = 1024 > Mi = 2^20 = 1048576 > Gi = 2^30 = 1073741824 > > So > > 120 GB ~= 111.8 GiB > > Interestingly, LVM1's vgdisplay incorrectly uses "GB" in its output > where it should say "GiB". > > Bill _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
