[linux-lvm] LVM pretends it has more space than it actually has

Gijs info at bsnw.nl
Mon Sep 19 17:40:52 UTC 2011

Thanks for the reply, however I don't think the size of the blockdev 
command is incorrect. At least not on my machine. I had already checked 
that earlier and it looked fine.

On 19-9-2011 2:21, Stuart D. Gathman wrote:
> This may not be related, but I had a problem with blockdev --getsize 
> in Fedora
> 14 returning the wrong size for an IDE drive on a USB-IDE/SATA 
> adapter.  It
> returned the correct size for SATA drives on the USB adapter, and for IDE
> drives connected to the internal IDE port.  So I chalked this up to 
> wierdness
> on the (nearly obsolete) USB/IDE interface.  But your problem suddenly 
> made me
> not so sure.
> On Sun, 18 Sep 2011, Gijs wrote:
>> Now I wonder why LVM wants to pretend it has more space than it 
>> actually has. Because when I subtract those sectors from each other, 
>> and I calculate how much bytes are in those "pretended sectors", it 
>> turns out that that's the exact amount that is missing (1MB).

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