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Full Discussion: Multipath configuration not being detected
Operating Systems Linux Red Hat Multipath configuration not being detected Post 303032172 by anaigini45 on Wednesday 13th of March 2019 05:00:57 AM
Old 03-13-2019
Multipath configuration not being detected
Hi,

In a RHEL 5 box, I have just added new multipath configurations in /etc/multipath.conf :

Code:
blacklist_exceptions {
        wwid "360002ac0000000000000008e0001ee00"
        wwid "360002ac0000000000000008f0001ee00"
        wwid "360002ac000000000000000900001ee00"
        wwid "360002ac000000000000000910001ee00"
        wwid "360002ac000000000000000920001ee00"
        wwid "360002ac000000000000000930001ee00"
}

These were the steps I used prior to adding the entries above :

1) Scan for available hosts in system :

Code:
[root@csixdb1 ~]# ls /sys/class/fc_host
host3  host4
[root@csixdb1 ~]#

2) Run the following commands to scan the LUN

Code:
$ echo "- - -" > /sys/class/scsi_host/host3/scan

$ echo "- - -" > /sys/class/scsi_host/host4/scan

However, even after the service is started, I am not getting any output from the commands multipath, multipath -v2 nor multipath -ll.

Code:
root@csixdb1 ~]# /etc/init.d/multipathd status
multipathd (pid  29995) is running...
[root@csixdb1 ~]#

Code:
[root@csixdb1 ~]# multipath
[root@csixdb1 ~]#

Code:
[root@csixdb1 ~]# multipath -v2
[root@csixdb1 ~]#

Code:
[root@csixdb1 ~]# multipath -ll
[root@csixdb1 ~]#

Why is this? And how do I proceed from here?
 

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LEARN ABOUT OPENSOLARIS

mp_disableautoprobing

MP_DisableAutoProbing(3MPAPI)			   Common Multipath Management Library Functions		     MP_DisableAutoProbing(3MPAPI)

NAME

       MP_DisableAutoProbing - disable auto-probing

SYNOPSIS

       cc [ flag... ] file... -lMPAPI [ library... ]
       #include <mpapi.h>

       MP_STATUS MP_DisableAutoProbing(MP_OID oid);

PARAMETERS

       oid    The object ID of the plugin or the multipath logical unit.

DESCRIPTION

       The MP_DisableAutoProbing() function disables auto-probing for the specified plugin  or multipath logical unit.

RETURN VALUES

       MP_STATUS_INVALID_OBJECT_TYPE

	   The oid does not specify any valid object type. This is most likely to happen if an uninitialized object ID is passed to the API.

       MP_STATUS_INVALID_PARAMETER

	   The oid has a type subfield other than MP_OBJE CT_TYPE_PLUGIN or MP_OBJECT_TYPE_MULTIPATH_LU.

       MP_STATUS_OBJECT_NOT_FOUND

	   The oid owner ID or object sequence number is invalid.

       MP_STATUS_SUCCESS

	   The operation is successful.

       MP_STATUS_UNSUPPORTED

	   The API is not supported.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard:  ANSI  INCITS 412  |
       |			     |Multipath Management API	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       libMPAPI(3LIB), MP_EnableAutoProbing(3MPAPI), attributes(5)

       Multipath Management API Version 1.0

SunOS 5.11							    15 Feb 2006 				     MP_DisableAutoProbing(3MPAPI)
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