- do the device nodes exist?
- are permissions set accordingly (i.e. writeable for grid installation user)?

what to do?

Device Checks for ASM – This is a pre-check to verify if the specified devices meet the requirements for configuration through the Oracle Universal Storage Manager Configuration Assistant.
Check Failed on Nodes: [rac-2] Check Succeeded On Nodes: [rac-1]
Verification result of failed node: rac-2
Expected Value
 : n/a
Actual Value
 : n/a
 List of errors:
 - 
PRVF-9994 : Owner, group, permission information could not be obtained for device(s) “/dev/sdb9″ on node “rac-2″  - Cause:  Owner, group and permission information could not be obtained for devices listed on the nodes listed.  - Action:  “Ensure that the correct devices were specified and that they are created on the indicated node. Make sure that the path exists and is accessible by the user.
 - 
PRVF-9994 : Owner, group, permission information could not be obtained for device(s) “/dev/sdb8″ on node “rac-2″  - Cause:  Owner, group and permission information could not be obtained for devices listed on the nodes listed.  - Action:  “Ensure that the correct devices were specified and that they are created on the indicated node. Make sure that the path exists and is accessible by the user.
 - 
PRVF-9994 : Owner, group, permission information could not be obtained for device(s) “/dev/sdb7″ on node “rac-2″  - Cause:  Owner, group and permission information could not be obtained for devices listed on the nodes listed.  - Action:  “Ensure that the correct devices were specified and that they are created on the indicated node. Make sure that the path exists and is accessible by the user.
 - 
PRVF-9994 : Owner, group, permission information could not be obtained for device(s) “/dev/sdb6″ on node “rac-2″  - Cause:  Owner, group and permission information could not be obtained for devices listed on the nodes listed.  - Action:  “Ensure that the correct devices were specified and that they are created on the indicated node. Make sure that the path exists and is accessible by the user.
 - 
PRVF-9994 : Owner, group, permission information could not be obtained for device(s) “/dev/sdb5″ on node “rac-2″  - Cause:  Owner, group and permission information could not be obtained for devices listed on the nodes listed.  - Action:  “Ensure that the correct devices were specified and that they are created on the indicated node. Make sure that the path exists and is accessible by the user.
 - 
PRVF-9994 : Owner, group, permission information could not be obtained for device(s) “/dev/sdb4″ on node “rac-2″  - Cause:  Owner, group and permission information could not be obtained for devices listed on the nodes listed.  - Action:  “Ensure that the correct devices were specified and that they are created on the indicated node. Make sure that the path exists and is accessible by the user.
 - 
PRVF-9994 : Owner, group, permission information could not be obtained for device(s) “/dev/sdb3″ on node “rac-2″  - Cause:  Owner, group and permission information could not be obtained for devices listed on the nodes listed.  - Action:  “Ensure that the correct devices were specified and that they are created on the indicated node. Make sure that the path exists and is accessible by the user.
 - 
PRVF-9994 : Owner, group, permission information could not be obtained for device(s) “/dev/sdb2″ on node “rac-2″  - Cause:  Owner, group and permission information could not be obtained for devices listed on the nodes listed.  - Action:  “Ensure that the correct devices were specified and that they are created on the indicated node. Make sure that the path exists and is accessible by the user.
 - 
PRVF-9994 : Owner, group, permission information could not be obtained for device(s) “/dev/sda7″ on node “rac-2″  - Cause:  Owner, group and permission information could not be obtained for devices listed on the nodes listed.  - Action:  “Ensure that the correct devices were specified and that they are created on the indicated node. Make sure that the path exists and is accessible by the user.
 - 
PRVF-9994 : Owner, group, permission information could not be obtained for device(s) “/dev/sda6″ on node “rac-2″  - Cause:  Owner, group and permission information could not be obtained for devices listed on the nodes listed.  - Action:  “Ensure that the correct devices were specified and that they are created on the indicated node. Make sure that the path exists and is accessible by the user.
 - 
PRVF-9994 : Owner, group, permission information could not be obtained for device(s) “/dev/sda5″ on node “rac-2″  - Cause:  Owner, group and permission information could not be obtained for devices listed on the nodes listed.  - Action:  “Ensure that the correct devices were specified and that they are created on the indicated node. Make sure that the path exists and is accessible by the user.
 - 
PRVF-9994 : Owner, group, permission information could not be obtained for device(s) “/dev/sdh” on node “rac-2″  - Cause:  Owner, group and permission information could not be obtained for devices listed on the nodes listed.  - Action:  “Ensure that the correct devices were specified and that they are created on the indicated node. Make sure that the path exists and is accessible by the user.
 - 
PRVF-9994 : Owner, group, permission information could not be obtained for device(s) “/dev/sda4″ on node “rac-2″  - Cause:  Owner, group and permission information could not be obtained for devices listed on the nodes listed.  - Action:  “Ensure that the correct devices were specified and that they are created on the indicated node. Make sure that the path exists and is accessible by the user.
 - 
PRVF-9994 : Owner, group, permission information could not be obtained for device(s) “/dev/sdg1″ on node “rac-2″  - Cause:  Owner, group and permission information could not be obtained for devices listed on the nodes listed.  - Action:  “Ensure that the correct devices were specified and that they are created on the indicated node. Make sure that the path exists and is accessible by the user.
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its looked clumsy for me.
can you refer an easy pointer for editing multipath.conf??

Multipathing is a type of connection redundancy often used in SAN or network environments where you have at least two redundant ways from your server to your san-box or switch. This involved two network cards in your server, two switches and so on. Everything is there twice. If one component fails there is no interruption in service because the other path is used.
Often multi-pathing is combined with some sort of load-balancing so increase bandwidth. But that depends.

Multipathing is configured at operating system leven and has nothing to do with the clusterware itself. In my documents i already describe network bonding which – with two interfaces – can also be seen as a form of multipathing.
In SAN environments you have to a vendor multipathing software or the linux multipathing software “dm”.

Sorry but i dont understand your question.

ie. bcz i have to make equivalence user.so i deleted user …. but their id is there…some permission and folder is not changed…..

i have a changed the settings now

thx r

regards

i have one or two questions.May i ??

what is multi-path?how it is helpful to grid??any doc link could be helpful….
is it possible to configure multi-path on just two C2D machine.

how to install clusterware if the multipath is configure?will the ASM take care of multi path??

regards