Multipath devnode blacklist

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07-10-2012

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Multipath devnode blacklist

hi all,

there�s one thing i dont understand ...

in the file /etc/multipath.conf, why do we incluide "dm-" ??? a device mapper dm- is not supposed to be a multipath part that will be used after configuring mutipath dm??

Code:

devnode_blacklist {
        devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
        devnode "^hd[a-z]"
        devnode "^cciss!c[0-9]d[0-9]*"
        devnode "^sd[a-z]"

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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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