[dm-devel] Need Help
Chandra Seetharaman
sekharan at us.ibm.com
Thu Jan 17 18:37:41 UTC 2008
Without the /etc/fstab, this is my hunch: you are using /dev/mpath
in /etc/fstab. Try /dev/mapper instead.
On Thu, 2008-01-17 at 08:35 -0600, Nath, Varun wrote:
> 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 at x mpath]# pwd
>
> /dev/mpath
>
> [root at 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 at redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel
--
----------------------------------------------------------------------
Chandra Seetharaman | Be careful what you choose....
- sekharan at us.ibm.com | .......you may get it.
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