[linux-lvm] fdisk and lvs size differences

[Bryn M. Reeves]

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Tomasz Chmielewski wrote:
> Let's say I have a 500GB logical volume:
> 
> # lvs | grep san2_data
>   san2_data                  san1 -wi-a- 500.00G
> 
> 
> fdisk will report a bigger number:
> 
> # fdisk -l /dev/san1/san2_data
> 
> Disk /dev/san1/san2_data: 536.8 GB, 536870912000 bytes

It's just units; the G in lvm's output signifies powers-of-two units,
wheras the GB reported by fdisk is in powers-of-ten (SI units).

See the lvm man pages for a description of the units supported (lower
case are SI, upper case are powers-of-two).

Strictly speaking, the powers-of-two versions should use the SI binary
prefixes (MiB, GiB, etc.):

http://en.wikipedia.org/wiki/Binary_prefix

Regards,
Bryn.

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