From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: Is it safe to shutdown while mdadm --grow is in progress. Date: Mon, 13 Oct 2014 09:15:28 +1100 Message-ID: <20141013091528.219789fb@notabene.brown> References: <543A15A6.5010508@gmail.com> <20141012193555.69907c13@notabene.brown> <543AA5B6.6010200@gmail.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; boundary="Sig_/Ji/_9q3ODG.LaAxs0XvupmX"; protocol="application/pgp-signature" Return-path: In-Reply-To: <543AA5B6.6010200@gmail.com> Sender: linux-raid-owner@vger.kernel.org To: Ram Ramesh Cc: Linux Raid List-Id: linux-raid.ids --Sig_/Ji/_9q3ODG.LaAxs0XvupmX Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Sun, 12 Oct 2014 11:00:54 -0500 Ram Ramesh wrote: > Thanks. I appreciate you taking the time to respond. I would like to=20 > forward this to those that maintain faq/wiki so that some one searches=20 > gets the info and does not have to bother you. Is that OK? Sure - anything on a public mailing list is public. >=20 > I normally would go for backup before rebuild, but 15TB disk space is=20 > too much to come up with, without serious $$ and need. Besides, these=20 > are movies/recordings for htpc and the data is available on=20 > dvds/internet. So there is inherent lack of importance. In other words,=20 > I recommend backup as most do, but it looks like every one has some=20 > justification not to do, and want some one else to assure them that it=20 > is ok :-) Quite understandable... NeilBrown >=20 > Thanks and Regards > Ramesh >=20 > On 10/12/2014 03:35 AM, NeilBrown wrote: > > On Sun, 12 Oct 2014 00:46:14 -0500 Ram Ramesh w= rote: > > > >> I googled this topic and got differing answers. Some old ones report > >> horror stories and others suggest rebuild continues after reboot > >> normally. My array is rebuilding and it will take about 6 days to > >> complete. I am expecting bad weather in a couple of days and would like > >> to proactively shutdown the machine and reboot. Is this safe? > >> > >> If the information is already available in a clear manner, please let = me > >> know. > >> > >> uname: Linux xxx 3.13.0-37-generic #64-Ubuntu SMP Mon Sep 22 21:28:38 > >> UTC 2014 x86_64 x86_64 x86_64 GNU/Linux > >> mdadm - v3.2.5 - 18th May 2012 > >> > >> Thanks for your help > >> > > It is certainly designed to be safe and my experience is that it is. > > However it is difficult to test all corner cases so it is not impossibl= e that > > someone what quite work right. > > If something does go wrong: > > 1/ don't panic > > 2/ don't try to --create the array to fix it > > 3/ report all details to this list and I'm 99.9% sure I can get your = array > > running again with all your data safe. > > But I suspect it won't come to that. > > > > NeilBrown --Sig_/Ji/_9q3ODG.LaAxs0XvupmX Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIVAwUBVDr9gDnsnt1WYoG5AQJs1Q//R661kBybdkWjhWNBNn9g4WeAXt74qOW6 HO1VdxHzv5DpaZ1WlHctFqlLQ9DVvWo6/yPsXUrVac8cQMByV4IQCnFGYa5ksC3w gl8i0Um/FJ0BORYO25qXgXiDI+j1hUT4FfTuZ/hv1//1qxY7cLHoIB9Tus1Z5u2M mBslq2dAPfZbWu/SKxR6oQi/kjE97QCk3Y2N4qWsJynks8aFpz165ObPPWzWdz7Z sUOt4bzjEgLVMm1kd44a7U80N8v8dDKTq9VoyOItZWTQOCoafeDzEMXDHYq5erXX JkPhFDtnncmi66S0FD3q1cPEWiWGV045A5w/3ksh0ACQ1UZDX3dF9i6KsoY/3Xvt ZB7lSQxGJW82GENlN/QgAsrkbzhT+W/eLcV8c+mSk3tAP+Y3sn1Qw4wy08Z01UDB TFY1KB2HJ45y1I3qTQXCI5HyA+fhqEKBw5n8LIDSGrTBS683gzLeMw6JXVI02ETC nuu0+XeQ3nGU/gzR6BMgLWyP/tWebn5Wa+8pPfET396bSfwnCWa4l8o7um+4WGy6 mTZRWNeKKsLXZsK2cVW+YtRcvspbw9GM3gCuqMkKtoizpPXSBsYP9DjE1GqnoENP PVqiOqvBgM2/KVfbNIUhK9L9aG6gVa4NZPnSx/7LAj3o04y6eUMZBbvX4wj75FKF 7NiVrGMPXQU= =HTBX -----END PGP SIGNATURE----- --Sig_/Ji/_9q3ODG.LaAxs0XvupmX--