From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: [md PATCH 01/10] md: allow a reshape operation to be reversed. Date: Tue, 2 Oct 2012 12:41:03 +1000 Message-ID: <20121002124103.6d66e3f2@notabene.brown> References: <20120403054656.19495.36380.stgit@notabene.brown> <20120403055301.19495.37242.stgit@notabene.brown> <20121001161554.2445f3e5@natsu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/rjNIUuUM6Gzghmcjm0AX3lF"; protocol="application/pgp-signature" Return-path: In-Reply-To: <20121001161554.2445f3e5@natsu> Sender: linux-raid-owner@vger.kernel.org To: Roman Mamedov Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/rjNIUuUM6Gzghmcjm0AX3lF Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Mon, 1 Oct 2012 16:15:54 +0600 Roman Mamedov wrote: > On Tue, 03 Apr 2012 15:53:01 +1000 > NeilBrown wrote: >=20 > > To reverse a partial reshape which changes the number of devices > > you can stop the array and re-assemble with the raid-disks numbers > > reversed and it will undo. >=20 > Unfortunately this does not seem to work: >=20 > # mdadm --assemble --raid-disks=3D5 --backup-file=3D/mnt/scratch/backup-f= ile /dev/md0 /dev/sdb1 /dev/sdc1 /dev/sde1 /dev/sdd1 /dev/sdf1 > mdadm:option --raid-disks not valid in assemble mode >=20 No, mdadm doesn't support this yet. The patch you identified is part of preparing the way for this functionality, but it isn't ready yet. For now, you'll just need to let the reshape complete. NeilBrown --Sig_/rjNIUuUM6Gzghmcjm0AX3lF Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (GNU/Linux) iQIVAwUBUGpUPznsnt1WYoG5AQLqIQ//VsQtq+Unb4gVaQM2cBBT0kmC+GTmtfd2 hYumDgxn8Lwbupo8+K32xQKziQMjxWOiStvClFGko8FaNSnbLHJJI/Yd173bjLra GsdpwXR6Giqxai/FX6y5Ur31WwDWuN4sei7gna+x+Rqgk0pBQIBvStyZAI2mUiWP tLFsqh3m7W+dykoqUUhbg9g21oHPbsYh1ECIB3ypK4iBkmBGtOHyNZTHsBkpwf4c pfJ/pJI51lnAI3kaueIgiDiRQzObAfe+3acVhDbp6XTZylfARPJ1MRSNDbDHkj6k JdlswGDeOeG3WZjdrEmhxq9RYPFoOfiT4sk6hyG5q6kzzSjlEvQt5ImVBI6kWpxW TjbZls3vvXWKTxUq0gnrngw+CHcj2z6CeVsUnJMntdT9+YMWE/QWcbQSRvA+ZUov 6taCNpMNs6CusqfQo6KsdoEXQ1qiUK+FmqJqAyZrMwe2MkKzXpVFvFXUtbigBWXd BZqErLZQt2tSwB5BMosxCfEKDYqOYq7VJQJ6KRs8507MZXAGZlHKvAX3w8jyRkJU soE3JmzSEwkJbfbOM/GTNp/F+dcjEjZAigTFJ5FbQJbnCAJs96zrOFcXcRT2v4vI Ie0+agBBsUgpwDJCKdciBFB26uxk+0UKSS8TJ/mnn7ZOWjAFa7HMcU8PHhJBnjMw hpl2G0f+7ac= =Wdy6 -----END PGP SIGNATURE----- --Sig_/rjNIUuUM6Gzghmcjm0AX3lF--