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Date: Tue, 05 Feb 2013 03:24:05 +0100
From: Milan Broz <gmazyland@gmail.com>
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Subject: Re: [dm-crypt] How to find out about mapped device name?
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To: dm-crypt <dm-crypt@saout.de>

On 02/05/2013 01:30 AM, Robert Nichols wrote:
> On 02/04/2013 05:32 PM, David Li wrote:
>> Hi Experts,
>>
>> I have already called luksFormat on a raw block dev and luksOpen to set up
>> mapped device in /dev/mapper. Is there a command to find out about the mapping
>> between the raw dev and mapped dev?
> 
> "dmsetup deps [name]" will give you the lists of (major, minor) device numbers
> underlying the names in /dev/mapper. Include the "name" argument (without the
> leading "/dev/mapper/") to get the device number(s) for a single name.
> 
> Root privileges are required.

try lsblk (no root required, just it need updated util-linux with this util).

Milan