Re: RAID Sizes (was Re: Why do people in the UK put a u in the word color?)
On 4/14/06, Andrei Popescu <andreimpopescu@gmail.com> wrote:
> > > > > On Wed, 2006-04-12 at 12:32 -0400, Matthias Julius wrote:
> > > > >> Yes, there is. As example here is part of the output of mdadm:
> > > > >>
> > > > >> Array Size : 468872448 (447.15 GiB 480.13 GB)
> > > > >> Device Size : 156290816 (149.05 GiB 160.04 GB)
> > > > >> ^^^ ^^
> > > > >>
> > > > >> Note there is GiB (gibibyte) which is 1024 MiB (mebibyte) and there is
> > > > >> GB (gigabyte) which is 1000 MB (megabyte).
> It was just right. This is more in detail:
>
> 156290816(kiB) * 1024 = 160041795584 bytes
>
> 160041795584/1000/1000/1000 ~= 160.04 GB
>
> or
>
> 160041795584/1024/1024/1024 ~= 149.05 GiB
This is an example of how just slightly better command output or
logging could save many man-hours of confusion or explanation. Since
the mdadm program displays the values in two human readable forms (GB
and GiB), it could also print the first number as a raw count of bytes
(with the suffix "bytes") to make the size of the array entirely clear
and precise to the user.
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