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Full Discussion: Help with Multipath
Operating Systems Linux Red Hat Help with Multipath Post 302684777 by Peasant on Friday 10th of August 2012 04:10:25 AM
Old 08-10-2012
Have you rescaned SCSI/FC bus for host to see the new luns ?

These commands should work :

Code:
echo 1 > /sys/class/fc_host/host0/issue_lip
echo 1 > /sys/class/fc_host/host1/issue_lip
echo "- - -" > /sys/class/scsi_host/host0/scan
echo  "- - -" > /sys/class/scsi_host/host1/scan

There can be also some vendor specific scripts/tools, like HP's fibre utils, so check if you have those before issuing above commands.

After re-scan restart multipath deamon and checki if /dev/mapper/orafra1 and /dev/mapper/data1 are created which you use further in your disk configuration (for creating volume groups, logical volumes etc.)

Hope that helps
Regards
Peasant.
 

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

NAME
MP_GetMultipathLus - return a list of multipath logical units SYNOPSIS
cc [ flag... ] file... -lMPAPI [ library... ] #include <mpapi.h> MP_STATUS MP_GetMultipathLus(MP_OID oid, MP_OID_LIST **ppList); PARAMETERS
oid The object ID of the plugin or device product object. ppList A pointer to a pointer to an object ID that has type MP_OID_LIST structure. With a successful return, this contains a pointer to an MP_OID_LIST that contains the object IDs of all the (multipath) logical units associated with the specified plugin object ID. DESCRIPTION
The MP_GetMultipathLus() function returns a list of multipath logical units associated to a plugin. When the caller is finished using the list it must free the memory used by the list by calling MP_FreeOidList. 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 ppList is null or specifies a memory area that cannot be written, or when oid has a type subfield other than MP_OBJECT_TYPE_DEVICE_PRODUCT or MP_OBJECT_TYPE_PLUG IN. MP_STATUS_OBJECT_NOT_FOUND The oid owner ID or object sequence number is invalid. MP_STATUS_SUCCESS The operation is successful. MP_STATUS_FAILED The plugin for the specified object ID is not found. MP_STATUS_INSUFFICIENT_MEMORY A memory allocation failure occurred. 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_GetMPLogicalUnitProperties(3MPAPI), attributes(5) Multipath Management API Version 1.0 SunOS 5.11 15 Feb 2006 MP_GetMultipathLus(3MPAPI)
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