Documentation on device-mapper and friends

[amit mehta]

On Sun, Apr 28, 2013 at 5:24 PM, Greg Freemyer <greg.freemyer at gmail.com> wrote:
> A nice diagram of the overall storage subsystem is at http://www.thomas-krenn.com/en/oss/linux-io-stack-diagram.html
>
> Dm is just a single block in it, but it can help to see where it fits in overall.
>
> Btw: that diagram doesn't show the legacy ata driver that creates /dev/hdx style devices.  Has that been dropped while I wasn't paying attention?  I haven't used it in years, but I thought it was still used on embedded systems.
>

Thank you for sharing the link, but I'm looking for more
detailed information on I/O stack in Linux, dm-mapper and
multipath in particular.