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Bug#250512: default sizing is wrong, fails to create logical volume



Package: lvmcfg
Tags: d-i
Version: 0.30
Severity: normal

I used partman-auto to partition a 3999 mb vmware virtual disk, using
the separate /home layout. Then I changed the /home partition so created
into a lvm physical volume, and configured lvm. I set up the VG to use
all of the PV, and then went to create a LV usig it. I took the default
size offered, and the creation failed. It said to see vc 3, which
contained:

Insufficient free extents (652) in volume group bar: 653 required

So this is some kind or math or rounding problem. Fdisk says the
following:

                Device Boot    Start     End    Blocks    Id   System
/dev/discs/disc0/part1    *        1    2478   1248880+   83   Linx  
/dev/discs/disc0/part2          2479    8126   2846592     f   W95 Ext'd (LBA)
/dev/discs/disc0/part5          2479     779   2671672+   8e   Linux LVM
/dev/discs/disc0/part6          7700    8126    174856+   82   Linux Swap

part5 was used for the LVM. lvmcfg lists it as 2.55 GB in size, and the
VG is listed later as:

foo	(Free: 2.55 GB/ Size 2.55 GB/ LVs: 0/ PVs: 1)

The default size then creating the LV in this VG is 2.55G. If I change
it to 2.54G, the creation works ok.

Oddly, in partman after creating the VG, it shows up in partman as 2.7
GB in size.

-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.4.26
Locale: LANG=en_US, LC_CTYPE=en_US

-- 
see shy jo

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