fdisk +size{K,M,G} is it 2^N or 10^N? Both ,I think
Reece Arnott <[email protected]>
| Newsgroups | gmane.org.user-groups.linux.dunedin.general |
|---|---|
| Message-ID | <[email protected]> |
I'm tracking down an issue and needed to know the exact number of bytes I'm creating a partition with using n fdisk script so I've looked in the source code (on my ubuntu 14.04 machine this is done with 'sudo apt-get source util-linux' and from looking specifically at the read_int_sx function it looks like there is an un-documented feature... When you create a partition when you have decided where it starts (enter to take the default), you are asked for the end which you can give as the end or additional sector/cylinder number or set it based on an additional size in K, M, or G. What I wanted to know was was if 1K=1000 or 1024 bytes (10^3 vs 2^10), 1M=1,000,000 or 1024*1024 bytes (10^6 vs 2^20) etc. It looks like you can actually give 6 options by including the undocumented option of a B as well: K = 2^10 bytes M = 2^20 bytes G = 2^30 bytes KB = 10^3 bytes MB = 10^6 bytes GB = 10^9 bytes I haven't got a spare machine to play with at the moment (this is a bit of research I bought home from work with me) so I don't know if this is actually the case but thought I'd share it anyway and assume someone will tell me if I've read it wrong. (the fdisk.c file I was looking at was last modified 18th October 2011 and the util-linux version is 2.20.1-5.1ubuntu20) -- "Believing men would act in their own interest was not cynicism, it turned out, but sheerest optimism; in reality men do not meet so high a standard." -- Harry Potter and the Methods of Rationality (Chapter 84) http://hpmor.com/ Reece Arnott Dunedin New Zealand _______________________________________________ DunLUG mailing list [email protected] http://lists.ethernal.org/listinfo/dunlug DunLUG Wiki - http://dunlug.kallisti.net.nz/