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From: "Navin P.S" <navinp1912@gmail.com>
To: dm-devel@redhat.com
Subject: write directly to device mapper snapshot origin device ?
Date: Thu, 14 Jul 2016 19:55:25 +0530	[thread overview]
Message-ID: <CAA=4086wdhAxNsWjAYgZG3bWORV2vF3YpMQk9OTjAg22MJi07Q@mail.gmail.com> (raw)

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

             reply	other threads:[~2016-07-14 14:25 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-07-14 14:25 Navin P.S [this message]
2016-07-15  8:29 ` write directly to device mapper snapshot origin device ? Navin P.S
2016-07-15 11:51   ` Mikulas Patocka
2016-07-15 12:15     ` Navin P.S
2016-07-15 12:35       ` Zdenek Kabelac
2016-07-15 12:40         ` Navin P.S
2016-07-15 12:44           ` Zdenek Kabelac
2016-07-15 18:58             ` Navin P.S
2016-07-15 13:50       ` Mikulas Patocka

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