From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: Question regarding RAID10 Date: Wed, 22 Feb 2012 06:46:11 +1100 Message-ID: <20120222064611.7d6fc20a@notabene.brown> References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/d8q5b79d2VE1i5bNhwYBM_L"; protocol="application/pgp-signature" Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Benjamin Goodrich , linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/d8q5b79d2VE1i5bNhwYBM_L Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Tue, 21 Feb 2012 09:58:36 -0700 Benjamin Goodrich wrote: > Neil, >=20 > I was hoping you could clear up a question I had. The software implementa= tion of RAID 10 on Linux does not seem to have a way to print the layout of= which disk is mirroring data for another disk. Is there a way to determine= which drives can be safely removed from the RAID 10 set? >=20 > Thanks, >=20 > Benjamin Please send all questions about linux RAID to linux-raid@vger.kernel.org I've copied this reply there. In general, if you don't remove adjacent devices you should be safe. (The last device is adjacent to the first). There are other combination that can be removed in specific case. Yes, it might be useful for mdadm to display something which clearly depicts the layout. Concrete suggestions welcome. Patches even more welcome. NeilBrown --Sig_/d8q5b79d2VE1i5bNhwYBM_L Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (GNU/Linux) iQIVAwUBT0P0gznsnt1WYoG5AQJHUw//Y9XQY5jXWVMwOtX3G1G2F1mYzsKIDbkT Gmp1YU/ngUR0Evf9ngMq0rT6KthzYyW+mGFPRxp22TUEkQ0wJzJHmF5xqCbETQSu 3Qphbw83KJRQUnjzbvU3uV52oVP/tQ4NMw+8xv9ML0Uk8V25nA1Rc1qKEKRYUpsF od0AZdTW6k0Es0q+/O98a6zWmLcXNXLO4/SpZBjWp+XAxnXAdSh66KYmvbIepg6T VxEuF7NKx4Gaf8nf04M9SSZLVaEz9AMTZRl0+3ww9avY8zv/1GNlrgpoQiyZgy9x ilOgmhZ5Hwfgn4PKpKyWFuyDAhcZFsfyDnECW9kJvkCsc6/Zxi/6HAQB4LA4iEE7 /tGLpKvcAlkrDAqMfbQRzBFIBDxzxGK7c+P+PmISB5k4w+dhT4TcGHDXvSwDrHy1 pxs5QxUReNU55vPiypEog1WR9gp1wGAXz+VojSxPqOzk21FwgJZbhXRfIzYz/yzk RLqWcAJQur+jbOlU01SFdtOsJA8W/KSb/0/wUopUHbfTHdj3PD4vyx6c/H3Aax7o WQ4j/it8Bk7HBCxtc7AfwoBOYwggec4hNaJG+N+XoM7cqLHPVA7UX5I7N4415Dj5 shCaXXz3/+RmWvrVAeuWuud5K1a6Ouss23vGiTSPsGpJ2pmjeql7+fK3CLcgCznT 6up47HQKUcU= =tRV3 -----END PGP SIGNATURE----- --Sig_/d8q5b79d2VE1i5bNhwYBM_L--