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Date: Wed, 28 Dec 2005 17:17:50 +0000
From: Zak Kipling <zak.kipling@cantab.net>
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Subject: Re: [linux-lvm] Error in "lvcreate" in LVM2
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To: LVM general discussion and development <linux-lvm@redhat.com>

natasha patil wrote:

> then  created volume group  using                         :         vgcreate
>     /proc/misc: No entry for device-mapper found
>     Is device-mapper driver missing from kernel?
>     Failure to communicate with kernel device-mapper driver.

I'm not familiar with Mandrake at all, but it looks like the 
device-mapper is neither compiled into your kernel or loaded as a 
module. Try "modprobe dm-mod", which should load the module if it exists 
on your system.

(I'd expect it to be built as a module on most distros' stock kernels -- 
if you've built your own kernel then you need to make sure that you have 
included the device mapper either in the main kernel or as a module -- 
the option is under "Device drivers" -> "Multi-device support (RAID and 
LVM)" -> "Device mapper support".)

Hope this helps,

Zak.