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[linux-lvm] fdisk and lvs size differences



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



Now, if fdisk -l would report 100 GB for some partition/disk/volume, a volume of which size should I create with "lvcreate" when I want to copy data from that partition/disk/volume to a new logical volume?

I wouldn't like to waste several gigabytes of space (this would happen if I create a 100G volume with lvcreate), perhaps there is some magic formula?



--
Tomasz Chmielewski
http://wpkg.org



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