From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: recommending RAID6 over RAID5 when doing mdadm --create Date: Tue, 12 Nov 2013 13:52:43 +1100 Message-ID: <20131112135243.285834fa@notabene.brown> References: <52809BC5.2010605@hardwarefreak.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/qVmXnpuxHfk8/V9y09M2d7Y"; protocol="application/pgp-signature" Return-path: In-Reply-To: <52809BC5.2010605@hardwarefreak.com> Sender: linux-raid-owner@vger.kernel.org To: stan@hardwarefreak.com Cc: Mikael Abrahamsson , linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/qVmXnpuxHfk8/V9y09M2d7Y Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Mon, 11 Nov 2013 02:56:37 -0600 Stan Hoeppner wrote: > On 11/11/2013 1:44 AM, Mikael Abrahamsson wrote: >=20 > > I believe this has been discussed before, but I would like to bring it > > up again. > >=20 > > I would like to see mdadm recommend RAID6 over RAID6 when using > > component drives that are 500GB or larger and ask if the user is really > > sure about using RAID5, plus a pointer to a webpage on the wiki > > informing the user about the trouble with RAID5 on large volumes with > > consumer or prosumer drives. > >=20 > > I am willing to contribute text to the webpage being pointed to. >=20 > Wikis change to regularly, too easily. Networks can be down at times, > often the worst times. See Murphy's Law. >=20 > It would be better to put this information in mdadm(8) and refer the > user there. >=20 .. or in md(4) maybe. If anyone wants to run with this and send me a patch (for code and documentation) I would be very likely to apply it. NeilBrown --Sig_/qVmXnpuxHfk8/V9y09M2d7Y Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (GNU/Linux) iQIVAwUBUoGX+znsnt1WYoG5AQLsnRAAmolTC6d1sokbDf+1ZYFMqZ4NN4IU6lDL 1sJtdnMykk6ko+DZkv7eZrQm2QcFnW++lrHi79WHWMI7iWBTcqf5kNDNiCDd/Zcw pIqAtC91fx9NOyijksZoJr0NvFqcFmXSxAHBaNOvZGCwwCaMS/IrR0apIBfJ2yBb kwcciS6iWrMbVDn4+FEZKJzlc+CAlJdE8B5nXRfmZRaZnCI8z+bM77IjslbWz3wu 0uu1lOAUKoWwaFzo1i80Z89kXgDtLZtizNy3hHv1WfhwNN+iBvOMxAIJxRepy6s4 bW3x6CIj18Nw/H35DO86zSVn85K8dhuemusgsUQUI27T7/woKshd3sBppJfFqMgs GLofSbcbbvHzAiGei+9sgTCjGqzcpD7wLNXd26+tNZpX2HnodqC73BrDMY91OMD+ ulqA/XELHvlKixq3TnaluelxaoJenOjazIxr9psg/SMRw9GrsDCFki3CXw86RhRW +2rlAffmayvSHnUqHtUMPWnx9MiW6rz2nf0hnFszWH2AyaJdQQBxfNDs9CaCSDAi JiWazL5a//5bYBi3LwvjfZvOewousQAt3LtOgNE+YPMfMn7R5jdDpHP8mIR5nbf/ e8bdHrV5347fpVty/3FNa9nwQj8aZN0kdwShX+QvF/D1/DXVv3v2MTrPmFBrvly9 JiWbAyUu/YQ= =1dys -----END PGP SIGNATURE----- --Sig_/qVmXnpuxHfk8/V9y09M2d7Y--