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.
Thanks! Paras.
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@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@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
Yes every thing's loaded.
Here is the output:
[root@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@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@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@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@centos.org http://lists.centos.org/mailman/listinfo/centos
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@gmail.comwrote:
Yes every thing's loaded.
Here is the output:
[root@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@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@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@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@centos.org http://lists.centos.org/mailman/listinfo/centos
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@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@cvprd2 etc]#
--
But when I do "multipath -v2" i donot see anything..
[root@cvprd2 etc]# multipath -v2 [root@cvprd2 etc]#
--
My multipath.conf is as below:
[root@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@cvprd1 etc]#
Thanks ! Paras
On Tue, Jan 12, 2010 at 10:37 AM, Paras pradhan pradhanparas@gmail.comwrote:
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@gmail.comwrote:
Yes every thing's loaded.
Here is the output:
[root@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@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@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@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@centos.org http://lists.centos.org/mailman/listinfo/centos
Paras pradhan wrote:
Can anybody tell me if my multipath o/p is fine?
Hitachi support should be able to
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.
Sounds like it is mis configured, doing some searches I found several references to the "/sbin/pp_hds_modular" command, which you may need, in this situation it's best to deal with your vendor support they should have instructions for supported MPIO configurations(whether or not linux device mapper is supported I don't know).
Also double/triple check that your array is truely active-active, from what I recall you had a really old HDS system, I don't recall many of them being active-active(in the sense that you can access the same volume over multiple controllers simultaneously vs having different volumes exported over different controllers).
For modular active-active I was in a presentation last year by HDS for their new AMS2k line up and they claimed that was the first modular active-active array(at least from them), others have had modular active-active for a few years now, they tried to claim they were the first despite that not being true.
http://www.hds.com/products/storage-systems/adaptable-modular-storage-2000-f...
For me if I yank a cable within a couple seconds the system recovers, my vendor provides extremely specific step-by-step instructions for configuring, including modifications to the multipath init script for proper operation(7 pages in a PDF just for MPIO configuration and examples).
nate
-
nate -
Paras pradhan