From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roman Mamedov Subject: Re: Migrating a RAID 5 from 4x2TB to 3x6TB ? Date: Wed, 10 Jun 2015 00:15:44 +0500 Message-ID: <20150610001544.484da3a6@natsu> References: <167089395.613.1433791723592.JavaMail.zimbra@wieser.fr> <55767860.5000803@gmail.com> <1222347192.1017.1433875572719.JavaMail.zimbra@wieser.fr> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/DvL_wv+.oAKwNfO_u.vYTCd"; protocol="application/pgp-signature" Return-path: In-Reply-To: <1222347192.1017.1433875572719.JavaMail.zimbra@wieser.fr> Sender: linux-raid-owner@vger.kernel.org To: Pierre Wieser Cc: Can Jeuleers , linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/DvL_wv+.oAKwNfO_u.vYTCd Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Tue, 9 Jun 2015 20:46:12 +0200 (CEST) Pierre Wieser wrote: > Does linux-raid have any recommandation(s) when managing more than 10TB o= f data ? >=20 > I may imagine: > - several smaller RAID 5 devices > - would RAID10 be a valuable solution in your opinion ? The solution is called RAID6. And don't go for overly large drives, e.g. 6x2TB is better than 4x3TB. 1) smaller drives might use more proven technology, require less precision,= so might be more reliable (at least according to hearsay and urban legends); 2) you need a considerable array member count anyway, to justify "losing" t= wo drives for parity in RAID6. "But my enclosure only fits 4 drives". "But I don't have enough SATA ports". Get a bigger enclosure. Get a second/third SATA controller. :) --=20 With respect, Roman --Sig_/DvL_wv+.oAKwNfO_u.vYTCd Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlV3O2AACgkQTLKSvz+PZwjWuQCfQiXjw9zhEHmQDMfzfYnY97mm Tm0An3RloreqymwwRTUp0WWiP+exlCBm =HwYM -----END PGP SIGNATURE----- --Sig_/DvL_wv+.oAKwNfO_u.vYTCd--