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Full Discussion: Info on /dev/dm files
Operating Systems Linux Red Hat Info on /dev/dm files Post 302664571 by Peasant on Friday 29th of June 2012 11:45:51 PM
Old 06-30-2012
Folks, according to DM Multipath - DM Multipath Configuration and Administration https://docs.google.com/viewer?url=h...path-en-US.pdf, page 17

"Any devices of form /dev/dm-n are for internal use only and should never be used"

The manual suggest using /dev/mapper devices in LVM/Multipath setup on RHEL6

Regards
Peasant.
This User Gave Thanks to Peasant For This Post:
 

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

NAME
MP_GetAssociatedPluginOid - get the object ID for the plugin SYNOPSIS
cc [ flag... ] file... -lMPAPI [ library... ] #include <mpapi.h> MP_STATUS MP_GetAssociatedPluginOid(MP_OID oid, MP_OID *pPluginOID); PARAMETERS
oid The object ID of an object that has been received from a previous API call. pPluginOID A pointer to an object ID that has type MP_OID structure allocated by the caller. With a successful return this will contain the object ID of the plugin associated with the object specified by the oid. DESCRIPTION
The MP_GetAssociatedPluginOid() function gets the object ID for the plugin associated with the specified object ID. The sequence number subfield of the oid is not validate since this API is implemented in the common library. 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 pluginOid is null or specifies a memory area to which data cannot be written. MP_STATUS_OBJECT_NOT_FOUND The oid owner ID is invalid. 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), attributes(5) Multipath Management API Version 1.0 SunOS 5.11 15 Feb 2006 MP_GetAssociatedPluginOid(3MPAPI)
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