[CentOS] multipath

Paras pradhan pradhanparas at gmail.com
Tue Jan 12 02:09:46 UTC 2010


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
>
>
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