What are dm-x devices?

[Anne Wilson]

On Monday 04 August 2008 14:45:07 Anders Karlsson wrote:
> * Anne Wilson <cannewilson at googlemail.com> [20080804 14:43]:
> > What are /dev/dm-0 through to /dev/dm-3?  They are listed as block
> > devices, and owned root:disk.  Looking at gkrellm, dm-0 and dm-2 appear
> > to mirror the activity of my system disk, sdb.
>
> Device mapper device-nodes. Look in /dev/mapper/ and you'll see them
> again, but with different names.
>
> > Then there are sr0 and sr1 - what are they?  Again, I can't see much in
> > the way of a clue.
>
> Optical recording devices usually. You have two CD-writers (or
> equivalent) attached?
>
Yes, that makes sense.  There is an ancient CD-writer and a DVD writer.

Thanks for the reply.

Anne


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