From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brad Campbell Subject: Re: Something is broken with SATA RAID ? Date: Thu, 03 Mar 2005 09:03:42 +0400 Message-ID: <42269AAE.7080106@wasp.net.au> References: <1109810381l.5754l.0l@werewolf.able.es> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit In-Reply-To: <1109810381l.5754l.0l@werewolf.able.es> Sender: linux-kernel-owner@vger.kernel.org To: "J.A. Magallon" Cc: Lista Linux-Kernel , RAID Linux List-Id: linux-raid.ids J.A. Magallon wrote: > Hi... > > I posted this in other mail, but now I can confirm this. > > I have a box with a SATA RAID-5, and with 2.6.11-rc3-mm2+libata-dev1 > works like a charm as a samba server, I dropped it 12Gb from an > osx client, and people does backups from W2k boxes and everything was fine. > With 2.6.11-rc4-mm1, it hangs shortly after the mac starts copying > files. No oops, no messages... It even hanged on a local copy (wget), > so I will discard samba as the buggy piece in the puzzle. > > I'm going to make a definitive test with rc5-mm1 vs rc5-mm1+libata-dev1. > I already know that plain rc5-mm1 hangs. I have to wait the md reconstruction > of the 1.2 TB to check rc5-mm1+libata (and no user putting things there...) > > But, anyone has a clue about what is happening ? I have seen other > reports of RAID related hangs... Any important change after rc3 ? > Any important bugfix in libata-dev1 ? Something broken in -mm ? There was (is) a bug in -rc4-mm1 that may still be there in -rc5-mm1 related to the way RAID-5 and RAID-6 writes out blocks that can cause a deadlock in the raid code. Do you processes just hang in the D state and any access to /proc/mdstat do the same thing? Can you try with just 2.6.11+libata+libata-dev? I moved to 2.6.11+libata+libata-dev+netdev and all my problems went away. CC'd to linux-raid Regards, Brad -- "Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so." -- Douglas Adams