From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brad Campbell Subject: Machine hanging on synchronize cache on shutdown 2.6.22-rc4-git[45678] Date: Sat, 16 Jun 2007 15:52:33 +0400 Message-ID: <4673CF01.6010402@wasp.net.au> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-ide@vger.kernel.org, RAID Linux List-Id: linux-raid.ids G'day all, I've got a box here based on current Debian Stable. It's got 15 Maxtor SATA drives in it on 4 Promise TX4 controllers. Using kernel 2.6.21.x it shuts down, but of course with a huge "clack" as 15 drives all do emergency head parks simultaneously. I thought I'd upgrade to 2.6.22-rc to get around this but the machine just hangs up hard apparently trying to sync cache on a drive. I've run this process manually, so I know it is being performed properly. Prior to shutdown, all nfsd processes are stopped, filesystems unmounted and md arrays stopped. /proc/mdstat shows root@storage1:~# cat /proc/mdstat Personalities : [raid6] [raid5] [raid4] unused devices: root@storage1:~# Here is the final hangup. http://www.fnarfbargle.com/CIMG1029.JPG They keyboard is responsive up until the "hard resetting port" when it just locks solid and requires a power-cycle. It's not really something I want to bisect if I can avoid it give the lovely noise it makes when I power it off. (this box only has a hard power switch, no reset or soft power buttons) 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