From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: RAID6 questions (mdadm 3.2.6/3.3.x) Date: Sat, 12 Jul 2014 11:20:34 +1000 Message-ID: <20140712112034.6b04d49f@notabene.brown> References: <53C06815.2020302@dobrotescu.ca> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/gjmpyLj4R6IncGTBq/aQb+3"; protocol="application/pgp-signature" Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Chris Murphy Cc: Vlad Dobrotescu , linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/gjmpyLj4R6IncGTBq/aQb+3 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Fri, 11 Jul 2014 19:09:48 -0600 Chris Murphy wrote: > > 7. I am sure I read somewhere (can't find the source anymore) that the = "new" RAID features of LVM2 are based on a fork from the md code. If this i= s true, are you guys are contributing to that project as well? >=20 > It's a good question, I'm not certain but my understanding is device mapp= er is leveraging existing md code in the kernel, rather than having forked = and duplicated that code. They have their own user space tools and on-disk = metadata so you can't use mdadm to manage it. Your understanding is correct. It is the same code for managing RAID functionality, but different code for managing metadata and different user-space tools. I'm hoping that one day the RAID support in LVM2 will be better than mdadm, and then I can just fade away and no-one will notice that I am gone. http://downatthirdman.files.wordpress.com/2010/06/grinning-chesire-cat.jpg NeilBrown --Sig_/gjmpyLj4R6IncGTBq/aQb+3 Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIVAwUBU8CNYjnsnt1WYoG5AQJ7wA/+PR20pBFJOWmNYcBjnVuwdM06iPLJQBdW VB5CzXG+qDmKnJRwUlyHhclTKuPgtgsTzbnGKdOJLFVKLels0Wpyz1nKxMzg7Vgv zCisvP0vPtYM1I7guddEYtoohlFwcXmMYAqvBsOr/JKoczKRatvMrwpdys8RefEX 8/UYqAU0ullrqUywj/OOoun7rvbUcx0rNM5/6JXn5hk/0uMXRwQipLjjtUSr0QKW fiuoFN3NRlDpM2+rXrMO9RUuiLlIVQRh5z7llESpAh2+MWb//vWzpyRSB6+SiGq6 4dN+SauxbUCkFUjYsi5EqbgZOEFUmKE3KJ1ZOWWnfljlgtlhfoEjwd2E0oNHS6EU T9L7nDns9n1mjkAoj3yU4R+wxwjDINeL93uGrhQ3ayYsI4EjQm+nvfz0DvPblybN jzZEGogrN0OO0XOc5QuR2ufAyC6x1htRJqdbGsRSAlIf/3vEMfwXy7mL4jxOOUcp BzNcRRO7+wtYSETixqJErB9vgKQqmSKxSCHEN73CpKtdbUmTSzl+M0UQG910i1WH axNgvTnlA49b9Ytm2cQx0AoHLLoGCPGjOl9JtZhXcqgJ1wuq4gDxc7Q3i3tKurtc SfmbhUp9rSHt37uP7DYKbm9q33Cjut2pcjmloQAtb+l8XU7HblUtnvie+kBX31Mh O4mPEP3xYN8= =UNch -----END PGP SIGNATURE----- --Sig_/gjmpyLj4R6IncGTBq/aQb+3--