[dm-devel] write directly to device mapper snapshot origin device ?

[Navin P.S]

Hi,
  Can i do dd if=/dev/zero of=/dev/mapper/dmo count=20 ? where dmo is
a dm snapshot origin created through dmsetup command. Instead of
/dev/zero i can write valid devices.

I could create the dmo through some lvm2 commands. Is direct write
with 4k (page size values ) allowed when it is mapped to 2 block
devices in linear mode ?


Regards,
-- Navin