From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oliver Heinz Subject: Multipath problem Date: Tue, 23 Nov 2004 13:19:51 +0100 Message-ID: <41A32AE7.2080502@fbihome.de> 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-raid@vger.kernel.org List-Id: linux-raid.ids Hi, I'm trying to setup a HP packaged cluster (2xDL380G4 Servers +MA500G2 Storage) both Servers are connected via 2 SCSI-Links one for each of the storages's redundancy controllers. The Storage shows as /dev/cciss/c0d1 and /dev/cciss/c1d0. When I create an multipath md device with version 1.6 of mdadm I can create it but restarting the array after I stopped it fails. With version 1.8.2 the size of the generated Array is 0 Blocks but I can restart it (which buys me nothing with that size ;-) Mixing mdadm-1.6 and 1.8.1 for creating/managing the device doesn't work, it gives me an segfault. Distro: Is debian woody, with a 2.4.25 debian standard kernel + patches for acl+ea and devmapper (linux-2.4.26-rc1-devmapper-ioctl.patch) Any Ideas? Thanks in advance, Oliver Version 1.60 (debian-package from adrian bunk): server-b:~# mdadm --create /dev/md0 --level multipath -n 2 /dev/cciss/c0d1 /dev/cciss/c1d0 VERS = 9000 mdadm: array /dev/md0 started. server-b:/usr/src/packages# cat /proc/mdstat Personalities : [multipath] read_ahead 1024 sectors md0 : active multipath cciss/c1d0[0] cciss/c0d1[1] 573496704 blocks [1/1] [U] unused devices: mdadm --examine --scan --config=/etc/mdadm/mdadm.conf >> /etc/mdadm/mdadm.conf server-b:/usr/src/packages/mdadm-1.8.1# cat /etc/mdadm/mdadm.conf DEVICE /dev/cciss/c[0-9]d[0-9] ARRAY /dev/md0 level=multipath num-devices=1 UUID=b4370fc9:9f734ab7:d6811ec0:062e8936 spares=2 devices=/dev/cciss/c1d0,/dev/cciss/c0d1 server-b:/usr/src/packages# mdadm /dev/md0 --stop server-b:/usr/src/packages# mdadm -A /dev/md0 -f /dev/cciss/c1d0 /dev/cciss/c0d1 mdadm: failed to RUN_ARRAY /dev/md0: Invalid argument Version 1.8.2 (source compiled): server-b:/usr/src/packages# mdadm --create /dev/md0 --level multipath -n 2 /dev/cciss/c0d1 /dev/cciss/c1d0 mdadm: array /dev/md0 started. server-b:~# cat /proc/mdstat Personalities : [multipath] read_ahead 1024 sectors md0 : active multipath cciss/c1d0[0] cciss/c0d1[1] 0 blocks [1/1] [U] unused devices: mdadm --examine --scan --config=/etc/mdadm/mdadm.conf >> /etc/mdadm/mdadm.conf server-b:/usr/src/packages# cat /etc/mdadm/mdadm.conf DEVICE /dev/cciss/c[0-9]d[0-9] ARRAY /dev/md0 level=multipath num-devices=1 UUID=afcb797f:f7cfa5f6:e0ed8819:59529278 devices=/dev/cciss/c1d0,/dev/cciss/c0d1 server-b:/usr/src/packages# mdadm /dev/md0 --stop server-b:/usr/src/packages/mdadm-1.8.1# mdadm -A /dev/md0 -f /dev/cciss/c1d0 /dev/cciss/c0d1 mdadm: /dev/md0 has been started with 1 drive and 1 spare.