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+++ This bug was initially created as a clone of Bug #802630 +++

Description of problem:

Neither manpage nor "/usr/share/doc/device-mapper-multipath-0.4.9" provide any info about "hwtable_regex_match" feature introduced by Bug #744756.

Version-Release number of selected component (if applicable):
device-mapper-multipath-0.4.9-48.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1. No document found for "hwtable_regex_match"

  
Actual results:
No document to explain how "hwtable_regex_match" work.

Expected results:
https://bugzilla.redhat.com/show_bug.cgi?id=744756#c15 could be good document for this parameter.
quote:
"hwtable_regex_match". Setting
it to "yes" will cause the user devices configs to be regex matched with the
builtin configs to determine if they should modify an existing config or create
a new one.   It defaults to "off".

Additional info:

This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.

This request was erroneously removed from consideration in Red Hat Enterprise Linux 6.4, which is currently under development.  This request will be evaluated for inclusion in Red Hat Enterprise Linux 6.4.

Added documentation

Reproduced in device-mapper-multipath-0.4.9-57.el6.x86_64 and verified in device-mapper-multipath-0.4.9-59.el6.x86_64.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2013-0458.html