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Re: [dm-devel] Need Help



Run the following:

# chkconfig multipathd on
# /etc/init.d/ multipath status

Regards,
Pradipmaya.

On Jan 17, 2008 12:15 PM, Nath, Varun <varun nath amd com> wrote:
> Hi,
>
> I don't see any think like boot.multipathd. Is it some special rpm that
> I need to install?
>
>
>
> -----Original Message-----
> From: dm-devel-bounces redhat com [mailto:dm-devel-bounces redhat com]
> On Behalf Of Pradipmaya Maharana
>
> Sent: Thursday, January 17, 2008 12:40 PM
> To: device-mapper development
> Subject: Re: [dm-devel] Need Help
>
> Attached document was shared by Chandra for installing RHEL/SLES on
> multipath devices.
> See if anything helps you.
>
> Regards,
> Pradipmaya.
>
> On Jan 17, 2008 10:34 AM, Nath, Varun <varun nath amd com> wrote:
> > Hi,
> >
> > Can you please provide me with the process to add the dm-multipath in
> > mkinitrd?
> >
> > I am sure that those devices are not getting loaded.
> >
> > Also regarding the fstab, I earlier had the LVM for those LUNs. But
> > since I faced the problem of system not booting up, I removed them for
> > the time being.
> >
> > Thanks,
> > Varun Nath
> >
> >
> > -----Original Message-----
> > From: dm-devel-bounces redhat com [mailto:dm-devel-bounces redhat com]
> > On Behalf Of Pradipmaya Maharana
> > Sent: Thursday, January 17, 2008 12:25 PM
> > To: device-mapper development
> > Subject: Re: [dm-devel] Need Help
> >
> > Could you please share the fstab entry (also what you are trying to
> add
> > to it).
> > When are you getting the problem (not recognizing devices), is it at
> > boot time?
> >
> > I am new to Linux but my hunch is when you are booting, as multipath
> > is loaded, these devices are not getting recognised. In this case you
> > might want to mkinitrd with dm-multipath.
> >
> > Thanks,
> > Pradipmaya.
> >
> > 2008/1/17 Nath, Varun <varun nath amd com>:
> > >
> > >
> > >
> > > Hi,
> > >
> > >
> > >
> > > I am trying to configure multipathing on Red hat 4 update 6 64 bit.
> > >
> > >
> > >
> > > Below is the list of RPM I have installed
> > >
> > >
> > >
> > > rpm -qa | grep mapper
> > >
> > > device-mapper-1.02.21-1.el4
> > >
> > > device-mapper-1.02.21-1.el4
> > >
> > > device-mapper-multipath-0.4.5-27.RHEL4
> > >
> > >
> > >
> > > The hardware is Sun x4600 and I am using QLA cards. The system has
> two
> > LUNs
> > > presented to it of size 10 GB and size 90 GB
> > >
> > >
> > >
> > > There is a problem when I configure file system on it. I am able to
> > access
> > > and mount the file system. But when I add those entries in
> /etc/fstab,
> > the
> > > system would not recognize those devices.
> > >
> > >
> > >
> > > Below is the output from multipath command
> > >
> > >
> > >
> > > multipath -ll
> > >
> > > mpath5 (3600508b40010541d00009000065d0000)
> > >
> > > [size=90 GB][features="1 queue_if_no_path"][hwhandler="0"]
> > >
> > > \_ round-robin 0 [prio=100][active]
> > >
> > >  \_ 1:0:0:2 sdd 8:48  [active][ready]
> > >
> > >  \_ 2:0:0:2 sdh 8:112 [active][ready]
> > >
> > > \_ round-robin 0 [prio=20][enabled]
> > >
> > >  \_ 1:0:1:2 sdf 8:80  [active][ready]
> > >
> > >  \_ 2:0:1:2 sdj 8:144 [active][ready]
> > >
> > >
> > >
> > > mpath4 (3600508b40010541d00009000065a0000)
> > >
> > > [size=10 GB][features="1 queue_if_no_path"][hwhandler="0"]
> > >
> > > \_ round-robin 0 [prio=100][enabled]
> > >
> > >  \_ 1:0:1:1 sde 8:64  [active][ready]
> > >
> > >  \_ 2:0:1:1 sdi 8:128 [active][ready]
> > >
> > > \_ round-robin 0 [prio=20][enabled]
> > >
> > >  \_ 1:0:0:1 sdc 8:32  [active][ready]
> > >
> > >  \_ 2:0:0:1 sdg 8:96  [active][ready]
> > >
> > >
> > >
> > >
> > >
> > > Also, below is my /etc/multipath.conf
> > >
> > >
> > >
> > > # This is an example configuration file for device mapper multipath.
> > >
> > > # For a complete list of the default configuration values, see
> > >
> > > #
> /usr/share/doc/device-mapper-multipath-0.4.5/multipath.conf.defaults
> > >
> > > # For a list of configuration options with descriptions, see
> > >
> > > #
> > /usr/share/doc/device-mapper-multipath-0.4.5/multipath.conf.annotated
> > >
> > >
> > >
> > >
> > >
> > > # Blacklist all devices by default. Remove this to enable
> multipathing
> > >
> > > # on the default devices.
> > >
> > > #devnode_blacklist {
> > >
> > > #        devnode "*"
> > >
> > > #}
> > >
> > >
> > >
> > > ## Use user friendly names, instead of using WWIDs as names.
> > >
> > > defaults {
> > >
> > >         user_friendly_names yes
> > >
> > >         selector   "round-robin 0"
> > >
> > > }
> > >
> > >
> > >
> > >
> > >
> > > ## By default, devices with vendor = "IBM" and product = "S/390.*"
> are
> > >
> > > ## blacklisted. To enable mulitpathing on these devies, uncomment
> the
> > >
> > > ## following lines.
> > >
> > > #devices {
> > >
> > > #       device {
> > >
> > > #               vendor                  "IBM"
> > >
> > > #               product                 "S/390 DASD ECKD"
> > >
> > > #               path_grouping_policy    multibus
> > >
> > > #               getuid_callout          "/sbin/dasdview -j -f
> /dev/%n"
> > >
> > > #               path_checker            directio
> > >
> > > #       }
> > >
> > > #}
> > >
> > >
> > >
> > >
> > >
> > > ##
> > >
> > > ## This is a template multipath-tools configuration file
> > >
> > > ## Uncomment the lines relevent to your environment
> > >
> > > ##
> > >
> > > #defaults {
> > >
> > > #       udev_dir                /dev
> > >
> > > #       polling_interval        10
> > >
> > > #       selector                "round-robin 0"
> > >
> > > #       path_grouping_policy    multibus
> > >
> > > #       getuid_callout          "/sbin/scsi_id -g -u -s /block/%n"
> > >
> > > #       prio_callout            /bin/true
> > >
> > > #       path_checker            readsector0
> > >
> > > #       rr_min_io               100
> > >
> > > #       rr_weight               priorities
> > >
> > > #       failback                immediate
> > >
> > > #       no_path_retry           fail
> > >
> > > #       user_friendly_name      yes
> > >
> > > #}
> > >
> > > ##
> > >
> > > ## The wwid line in the following blacklist section is shown as an
> > example
> > >
> > > ## of how to blacklist devices by wwid.  The 3 devnode lines are the
> > >
> > > ## compiled in default blacklist. If you want to blacklist entire
> > types
> > >
> > > ## of devices, such as all scsi devices, you should use a devnode
> > line.
> > >
> > > ## However, if you want to blacklist specific devices, you should
> use
> > >
> > > ## a wwid line.  Since there is no guarantee that a specific device
> > will
> > >
> > > ## not change names on reboot (from /dev/sda to /dev/sdb for
> example)
> > >
> > > ## devnode lines are not recommended for blacklisting specific
> > devices.
> > >
> > > ##
> > >
> > > devnode_blacklist {
> > >
> > >        wwid 3600508e000000000ed7fb52911133c06
> > >
> > >         devnode "^(ram|raw|loop|fd|md|sr|scd|st)[0-9]*"
> > >
> > >         devnode "^hd[a-z]"
> > >
> > > }
> > >
> > > #multipaths {
> > >
> > > #       multipath {
> > >
> > > #               wwid
> > 3600508b4000156d700012000000b0000
> > >
> > > #               alias                   yellow
> > >
> > > #               path_grouping_policy    multibus
> > >
> > > #               path_checker            readsector0
> > >
> > > #               path_selector           "round-robin 0"
> > >
> > > #               failback                manual
> > >
> > > #               rr_weight               priorities
> > >
> > > #               no_path_retry           5
> > >
> > > #       }
> > >
> > > #       multipath {
> > >
> > > #               wwid                    1DEC_____321816758474
> > >
> > > #               alias                   red
> > >
> > > #       }
> > >
> > > #}
> > >
> > > #devices {
> > >
> > > #       device {
> > >
> > > #               vendor                  "COMPAQ  "
> > >
> > > #               product                 "HSV110 (C)COMPAQ"
> > >
> > > #               path_grouping_policy    multibus
> > >
> > > #               getuid_callout          "/sbin/scsi_id -g -u -s
> > /block/%n"
> > >
> > > #               path_checker            readsector0
> > >
> > > #               path_selector           "round-robin 0"
> > >
> > > #               hardware_handler        "0"
> > >
> > > #               failback                15
> > >
> > > #               rr_weight               priorities
> > >
> > > #               no_path_retry           queue
> > >
> > > #       }
> > >
> > > #       device {
> > >
> > > #               vendor                  "COMPAQ  "
> > >
> > > #               product                 "MSA1000         "
> > >
> > > #               path_grouping_policy    multibus
> > >
> > > #       }
> > >
> > > #}
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Here is the contents of the /dev/mpath/
> > >
> > >
> > >
> > > [root x mpath]# pwd
> > >
> > > /dev/mpath
> > >
> > > [root x mpath]# ls -all
> > >
> > > total 0
> > >
> > > drwxr-xr-x   2 root root   80 Jan 16 17:34 .
> > >
> > > drwxr-xr-x  12 root root 5260 Jan 17 08:17 ..
> > >
> > > lrwxrwxrwx   1 root root    7 Jan 16 17:34 mpath4 -> ../dm-8
> > >
> > > lrwxrwxrwx   1 root root    7 Jan 16 17:34 mpath5 -> ../dm-9
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Can anyone please help me with this? I think I am missing some
> > configuration
> > > on the system which is causing this.
> > >
> > >
> > >
> > > Thanks,
> > >
> > >
> > >
> > >
> > > --
> > > dm-devel mailing list
> > > dm-devel redhat com
> > > https://www.redhat.com/mailman/listinfo/dm-devel
> > >
> >
> > --
> > dm-devel mailing list
> > dm-devel redhat com
> > https://www.redhat.com/mailman/listinfo/dm-devel
> >
> >
> >
> >
> >
> > --
> > dm-devel mailing list
> > dm-devel redhat com
> > https://www.redhat.com/mailman/listinfo/dm-devel
> >
>
>
>
> --
> dm-devel mailing list
> dm-devel redhat com
> https://www.redhat.com/mailman/listinfo/dm-devel
>


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