From mboxrd@z Thu Jan 1 00:00:00 1970 From: Neil Brown Subject: Re: a couple of mdadm questions Date: Tue, 9 Sep 2003 08:35:58 +1000 Sender: linux-raid-owner@vger.kernel.org Message-ID: <16221.1102.595382.211237@gargle.gargle.HOWL> References: <1062879895.8172.20.camel@opus> <16220.10893.339884.282892@gargle.gargle.HOWL> <20030908200903.GB15482@percy.comedia.it> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: message from Luca Berra on Monday September 8 To: Luca Berra Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Monday September 8, bluca@comedia.it wrote: > On Mon, Sep 08, 2003 at 05:06:53PM +1000, Neil Brown wrote: > >You could get mdadm 1.3.0, add some patches from > > http://cgi.cse.unsw.edu.au/~neilb/source/mdadm/patch/applied/ > > just a silly question: > > 003MdSuperFix > Status: ok > Make sure unused superblock descriptor entries aren't failed. > This confuses 2.4 kernel code. > > do you mean that without this patch 2.4 kernel gets confused > > or do you mean that this patch is harmful for 2.4 > The patch modifies --update=summaries to make some further normalisations of the superblock. At least one superblock has been seen in the wild that was not correct (i.e. had unused descriptors that were marked 'failed') and this superblock confused 2.4 badly. i.e. with this patch it is possible to fix a rare condition that confused 2.4 I hope that makes it reasonably clear :-) NeilBrown > regards, > L. > > -- > Luca Berra -- bluca@comedia.it > Communication Media & Services S.r.l. > /"\ > \ / ASCII RIBBON CAMPAIGN > X AGAINST HTML MAIL > / \