On Wed, 2009-06-24 at 18:09 +0200, Mario Mech wrote: > Hi, > > I need help with a similar or even the same issue as in the thread mentioned in the Subject > (https://www.redhat.com/archives/dm-devel/2008-October/msg00130.html). My bad. I had some issues during debug and never got back to it. Will send couple of patches by tomorrow to fix this problem. > > On two PowerEdge 2970 with CentOS 5.3 connected to a MD3000i I get the following messages in /var/log/messages > > Jun 24 17:57:49 ninja multipathd: dm-3: add map (uevent) > Jun 24 17:57:49 ninja kernel: end_request: I/O error, dev sdc, sector 530184 > Jun 24 17:57:49 ninja kernel: device-mapper: multipath: Failing path 8:32. > Jun 24 17:57:49 ninja multipathd: dm-3: devmap already registered > Jun 24 17:57:49 ninja multipathd: 8:32: mark as failed > Jun 24 17:57:49 ninja multipathd: mpath8: remaining active paths: 3 > Jun 24 17:57:49 ninja multipathd: dm-3: add map (uevent) > Jun 24 17:57:49 ninja kernel: end_request: I/O error, dev sdd, sector 530184 > Jun 24 17:57:49 ninja kernel: device-mapper: multipath: Failing path 8:48. > Jun 24 17:57:49 ninja kernel: device-mapper: multipath: Cannot failover device because scsi_dh_rdac was not loaded. > Jun 24 17:57:49 ninja kernel: device-mapper: multipath: Failing path 8:80. > Jun 24 17:57:49 ninja kernel: device-mapper: multipath: Could not failover device. Error 15. > Jun 24 17:57:49 ninja kernel: device-mapper: multipath: Cannot failover device because scsi_dh_rdac was not loaded. > Jun 24 17:57:49 ninja kernel: device-mapper: multipath: Failing path 8:64. > Jun 24 17:57:49 ninja kernel: device-mapper: multipath: Could not failover device. Error 15. > Jun 24 17:57:49 ninja kernel: GFS2: fsid=ninjo_cluster:gfsfs.0: gfs2_quotad: statfs error -5 > Jun 24 17:57:49 ninja multipathd: dm-3: devmap already registered > Jun 24 17:57:50 ninja multipathd: dm-3: add map (uevent) > Jun 24 17:57:50 ninja multipathd: dm-3: devmap already registered > Jun 24 17:57:50 ninja multipathd: dm-3: add map (uevent) > Jun 24 17:57:50 ninja multipathd: dm-3: devmap already registered > Jun 24 17:57:50 ninja multipathd: 8:48: mark as failed > Jun 24 17:57:50 ninja multipathd: mpath8: remaining active paths: 2 > Jun 24 17:57:50 ninja multipathd: 8:64: mark as failed > Jun 24 17:57:50 ninja multipathd: mpath8: remaining active paths: 1 > Jun 24 17:57:50 ninja multipathd: 8:80: mark as failed > Jun 24 17:57:50 ninja multipathd: mpath8: remaining active paths: 0 > Jun 24 17:57:54 ninja multipathd: 8:32: reinstated > Jun 24 17:57:54 ninja multipathd: mpath8: remaining active paths: 1 > Jun 24 17:57:54 ninja multipathd: dm-3: add map (uevent) > Jun 24 17:57:54 ninja multipathd: dm-3: devmap already registered > Jun 24 17:57:55 ninja multipathd: 8:64: reinstated > Jun 24 17:57:55 ninja multipathd: mpath8: remaining active paths: 2 > Jun 24 17:57:55 ninja multipathd: 8:80: reinstated > Jun 24 17:57:55 ninja multipathd: mpath8: remaining active paths: 3 > Jun 24 17:57:55 ninja multipathd: 8:48: reinstated > Jun 24 17:57:55 ninja multipathd: mpath8: remaining active paths: 4 > Jun 24 17:57:55 ninja multipathd: dm-3: add map (uevent) > Jun 24 17:57:55 ninja multipathd: dm-3: devmap already registered > Jun 24 17:57:55 ninja multipathd: dm-3: add map (uevent) > Jun 24 17:57:55 ninja multipathd: dm-3: devmap already registered > Jun 24 17:57:55 ninja multipathd: dm-3: add map (uevent) > Jun 24 17:57:55 ninja multipathd: dm-3: devmap already registered > > The following additional information can I provide. > > [root@ninja redhat]# lsmod | egrep 'rdac|multi' > scsi_dh_rdac 40897 1 > dm_multipath 55257 2 dm_round_robin > scsi_dh 41665 2 scsi_dh_rdac,dm_multipath > dm_mod 100369 18 dm_multipath,dm_raid45,dm_snapshot,dm_zero,dm_mirror,dm_log > scsi_mod 196569 10 scsi_dh_rdac,ib_iser,iscsi_tcp,libiscsi,scsi_transport_iscsi,scsi_dh,sg,libata,megaraid_sas,sd_mod > > [root@ninja redhat]# multipath -ll > mpath8 (360024e80004ec0de000010324a373eeb) dm-3 DELL,MD3000i > [size=7.5T][features=0][hwhandler=1 rdac][rw] > \_ round-robin 0 [prio=200][enabled] > \_ 7:0:0:0 sde 8:64 [active][ghost] > \_ 5:0:0:0 sdf 8:80 [active][ghost] > \_ round-robin 0 [prio=0][enabled] > \_ 8:0:0:0 sdd 8:48 [active][ready] > \_ 6:0:0:0 sdc 8:32 [active][ready] > > The multipath version shipped with CentOS 5.3 is multipath-tools v0.4.7 (03/12, 2006). > > As I've seen in the mentioned thread something like > > echo rdac > /sys/block/sd?/device/dh_state > > should fix at least the failover problem. > > But I do not see any dh_state in /sys/block/sd?/device/ and I'm not allowed (even as root) to do anything like: > > for i in c d e f; do echo rdac > /sys/block/sd$i/device/dh_state; done > > At the moment I'd like to avoid building the multipath package by myself with the patch provided in the afore mentioned thread. The changes are in kernel code. > > Do you have any ideas? Or is a different problem I have. It is the same problem and I am afraid that you do not have a way out. May be next version of RHEL might add your device to rdac_dev_list (if you could do that that would fix the problem). > > Every help is appreciated. > > All best > > Mario > -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
