Can anybody tell me if my multipath o/p is fine? I have a active/active setup and when I unplug the FC SAN cable on one of the ports of my HBA my host is being un responsive and need to reboot it. When I do multipath -ll I can see: [root at cvprd2 etc]# multipath -ll mpath2 (360060e8004770d000000770d0000018c) dm-1 HITACHI,OPEN-V*10 [size=335G][features=1 queue_if_no_path][hwhandler=0][rw] \_ round-robin 0 [prio=8][active] \_ 6:0:0:1 sdc 8:32 [active][ready] \_ 6:0:0:16385 sde 8:64 [active][ready] \_ 6:0:0:32769 sdg 8:96 [active][ready] \_ 6:0:0:49153 sdi 8:128 [active][ready] \_ 5:0:0:1 sdk 8:160 [active][ready] \_ 5:0:0:16385 sdm 8:192 [active][ready] \_ 5:0:0:32769 sdo 8:224 [active][ready] \_ 5:0:0:49153 sdq 65:0 [active][ready] mpath1 (360060e8004770d000000770d00000154) dm-0 HITACHI,OPEN-V*9 [size=301G][features=1 queue_if_no_path][hwhandler=0][rw] \_ round-robin 0 [prio=8][active] \_ 6:0:0:0 sdb 8:16 [active][ready] \_ 6:0:0:16384 sdd 8:48 [active][ready] \_ 6:0:0:32768 sdf 8:80 [active][ready] \_ 6:0:0:49152 sdh 8:112 [active][ready] \_ 5:0:0:0 sdj 8:144 [active][ready] \_ 5:0:0:16384 sdl 8:176 [active][ready] \_ 5:0:0:32768 sdn 8:208 [active][ready] \_ 5:0:0:49152 sdp 8:240 [active][ready] [root at cvprd2 etc]# -- But when I do "multipath -v2" i donot see anything.. [root at cvprd2 etc]# multipath -v2 [root at cvprd2 etc]# -- My multipath.conf is as below: [root at cvprd1 etc]# more multipath.conf # This is a basic configuration file with some examples, for device mapper # multipath. # For a complete list of the default configuration values, see # /usr/share/doc/device-mapper-multipath-0.4.7/multipath.conf.defaults # For a list of configuration options with descriptions, see # /usr/share/doc/device-mapper-multipath-0.4.7/multipath.conf.annotated # Blacklist all devices by default. Remove this to enable multipathing # on the default devices. blacklist { devnode "^sda" } ## Use user friendly names, instead of using WWIDs as names. defaults { user_friendly_names yes polling_interval 5 no_path_retry 3 failover immediate path_grouping_policy multibus rr_weight priorities path_checker readsector0 } devices { device { vendor "HITACHI" product "OPEN-V" path_grouping_policy multibus path_checker readsector0 getuid_callout "/sbin/scsi_id -g -u -p0x80 -s /block/%n" } } [root at cvprd1 etc]# Thanks ! Paras On Tue, Jan 12, 2010 at 10:37 AM, Paras pradhan <pradhanparas at gmail.com>wrote: > Upgrding the kernel to 2.6.18-164.10.1.el5xen brought back /dev/dm-* and > now multipath -ll has the ouput. > > I am curious about what has caused the lost of /dev/dm* in my previous > kernel. > > Any ideas? > > Paras. > > > On Mon, Jan 11, 2010 at 8:09 PM, Paras pradhan <pradhanparas at gmail.com>wrote: > >> Yes every thing's loaded. >> >> Here is the output: >> >> [root at cvprd1 ~]# lsmod | grep dm >> dm_round_robin 36801 0 >> rdma_cm 68565 1 ib_iser >> ib_cm 73449 1 rdma_cm >> iw_cm 43465 1 rdma_cm >> ib_sa 75209 2 rdma_cm,ib_cm >> ib_core 105157 6 ib_iser,rdma_cm,ib_cm,iw_cm,ib_sa,ib_mad >> ib_addr 41929 1 rdma_cm >> dm_multipath 56153 1 dm_round_robin >> scsi_dh 41665 1 dm_multipath >> dm_raid45 99401 0 >> dm_message 36289 1 dm_raid45 >> dm_region_hash 46273 1 dm_raid45 >> dm_mem_cache 39489 1 dm_raid45 >> dm_snapshot 52105 0 >> dm_zero 35265 0 >> dm_mirror 54737 0 >> dm_log 44993 3 dm_raid45,dm_region_hash,dm_mirror >> dm_mod 101521 11 >> dm_multipath,dm_raid45,dm_snapshot,dm_zero,dm_mirror,dm_log >> >> >> >> Thanks >> Paras. >> >> >> >> >> On Mon, Jan 11, 2010 at 6:33 PM, nate <centos at linuxpowered.net> wrote: >> >>> Paras pradhan wrote: >>> > Hi. >>> > >>> > Somehow I do not see any out put using multipath -l or multipath -ll . >>> But I >>> > can see using dry run ie multipath -d. >>> > >>> > Also I do not see /dev/dm-* >>> > >>> > It was there before. How do I re claim it. >>> >>> Are the modules loaded? >>> >>> [root at dc1-mysql001a:~]# lsmod | grep dm >>> dm_zero 35265 0 >>> dm_mirror 60617 0 >>> dm_round_robin 36801 1 >>> dm_multipath 52945 2 dm_round_robin >>> dm_mod 99737 17 dm_zero,dm_mirror,dm_multipath >>> [root at dc1-mysql001a:~]# multipath -l >>> 350002ac0006a0714dm-1 3PARdata,VV >>> [size=1.0T][features=0][hwhandler=0] >>> \_ round-robin 0 [prio=0][active] >>> \_ 1:0:0:3 sdc 8:32 [active][undef] >>> \_ 1:0:1:3 sde 8:64 [active][undef] >>> \_ 2:0:0:3 sdg 8:96 [active][undef] >>> \_ 2:0:1:3 sdi 8:128 [active][undef] >>> 350002ac000790714dm-0 3PARdata,VV >>> [size=2.0T][features=0][hwhandler=0] >>> \_ round-robin 0 [prio=0][active] >>> \_ 1:0:0:2 sdb 8:16 [active][undef] >>> \_ 1:0:1:2 sdd 8:48 [active][undef] >>> \_ 2:0:0:2 sdf 8:80 [active][undef] >>> \_ 2:0:1:2 sdh 8:112 [active][undef] >>> >>> >>> >>> nate >>> >>> >>> _______________________________________________ >>> CentOS mailing list >>> CentOS at centos.org >>> http://lists.centos.org/mailman/listinfo/centos >>> >> >> > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20100112/837b591e/attachment-0005.html>