From mboxrd@z Thu Jan 1 00:00:00 1970 From: martin f krafft Subject: Extending a =?iso-8859-1?Q?4=D73Tb?= RAID10 Date: Tue, 9 Jul 2013 20:22:22 +0200 Message-ID: <20130709182222.GA3952@fishbowl> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="J/dobhs11T7y2rNN" Return-path: Content-Disposition: inline Sender: linux-raid-owner@vger.kernel.org To: linux-raid mailing list List-Id: linux-raid.ids --J/dobhs11T7y2rNN Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello, We have a RAID10 across 4 3TB drives (metadata version 1.2, 2 offset-copies, bitmaps), with LVM on top. We are running out of space, but we don't really want to invest in 4 new 4TB drives right now. Is it possible to replace only two of the 3TB drives with 4TB drives and get an extra terrabyte into the array somehow? Anything I tried so far on a test system didn't work. I can add the new devices to the RAID, but if I try to grow the array to the new size, I get: mdadm: component size of /dev/md2 unchanged at X Do I have to fail two drives, create a new RAID10, add a new LVM PV on it, and pvmove the data over, all the while hoping that none of the four disks die =E2=80=94 even though there is a backup (the two failed drives), that's a one-shot backup and that is too risky. That said, it isn't even possible to have a RAID10 across 2x2 pairs of disks with different sizes, is it? Why not? I'd really rather avoid pulling two RAID1s together with LVM, although I guess that is essentially the same as RAID10. Thanks, --=20 martin | http://madduck.net/ | http://two.sentenc.es/ =20 "the pure and simple truth is rarely pure and never simple." -- oscar wilde =20 spamtraps: madduck.bogus@madduck.net --J/dobhs11T7y2rNN Content-Type: application/pgp-signature; name="digital_signature_gpg.asc" Content-Description: Digital signature (see http://martin-krafft.net/gpg/sig-policy/999bbcc4/current) -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQLvBAEBCgDZBQJR3FTcwBEaaHR0cDovL21hcnRpbi1rcmFmZnQubmV0L2dwZy9z aWctcG9saWN5LzU1Yzk4ODJkOTk5YmJjYzQvMjAxMTAxMjQxMTI1P3NoYTUxMnN1 bT0xY2FkOTZmZDI3ZDMyMzNmNTNlMjI4NDk1MzM2NDgxMDdlNWVlOGQ1YmU2NTUy NTFkNzRjOGYxYzVjM2JjNDJmMjMwNGZhNTE1MTUwZjdiZDRkZDA1ZTk4MTk5MjRm MDQ5NTEzZWU5OTYyY2E3MTcwOWY4MWQ5NDUxNTg1MmJkOAAKCRBVyYgtmZu8xPFz EADF3Un7xVhWbgx4V9ag5fc2iO0dFldooHr0olrvwwx4Jy+ojWu7oVb6ASaoHoZG 9OYEfsuqi9Y52pqFZlpQJy4wmhrRjOAx9n4hzpvRLj8yNKWBHdTSFGqQ4IVBNczy hoko9y+69IxdIX/hgQaCUeNBt6MOqE4C4Bb3YeN4xrYpV/v3c8+78aQCiydnFRYL 0SGHEoAOo1f+p58IawapP1IhrLgRXmX5Sn6lm+37s8pfRoGiei0C0BJgid71j3AD kPBu+bVbZzYzuogHmsBNCJ3Fkh3TVBiJHVFTrxYgdRqtXUvpsQbeDCw8/atypYtT mIqBIpSWtDCu1WFZt/ByVyR2ydmczrt2wpKTpFx2VgcONPYAeUdft4eYeMPMpJv+ tAGXYN+QmCHrzhMlYZHwI894T0mBWj8xcQGnjmDoHflFTJfPaGal9krWXQjlPadg 1Pb4uEgV8Z2eMBuufeNuA4mHnbAv1vKBXE3YZJIHTjdWTY0i+yiMZ3B603ITvgyq 6t6REELcSayigzBSQ1MThqkiY7LXTyB00onk6ZWOIiePJzKAQVytkDzjp4T+DSxz u3JCAKaDyRHz7/VBDCQ+FwB+6ezsUL6B/pMArqoD5+CT9JwLCmNwXjD5BjLIEaY1 fol/TmFxnYB9qSF0euuc9kd+3JUDzOuNfV1mLa55fXSnFA== =ddxc -----END PGP SIGNATURE----- --J/dobhs11T7y2rNN--