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On 10/25/2013 07:29 AM, Zama Ques wrote:
<blockquote
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<div
style="color:#000;background-color:#fff;font-family:times
new roman, new york, times, serif;font-size:12pt;">Creating
a new RAMDISK resolved the issue as suggested by Elvir
Kuric after blacklisting the local disk in multipath.conf
. <br clear="none">
<br clear="none">
====<br clear="none">
$ df<br clear="none">
Filesystem 1K-blocks Used Available Use%
Mounted on<br clear="none">
/dev/sda8 43112964 19708732 21214204 49% /<br
clear="none">
tmpfs 32978736 25836 32952900 1%
/dev/shm<br clear="none">
/dev/sda1 198337 66006 122091 36%
/boot<br clear="none">
/dev/sda6 10079084 840160 8726924 9%
/opt<br clear="none">
/dev/mapper/mpathbp1 51606124 184136 48800552 1%
/webdata<br clear="none">
/dev/mapper/mpathcp1 209690016 3414728 206275288 2%
/sharedweb<br clear="none">
===<br clear="none">
<br clear="none">
Other options of setting following parameter "
find_multipaths yes" did not helped to resolve the
issue. <br clear="none">
<br clear="none">
Thanks all for the replies and suggestions. <br
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<span
id="yiv0668673228yui_3_13_0_rc_1_9_1382601039487_30"></span></div>
<div id="yiv0668673228yui_3_13_0_rc_1_9_1382601039487_67"
style="color:rgb(0, 0,
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times,
serif;background-color:transparent;font-style:normal;"><span
id="yiv0668673228yui_3_13_0_rc_1_9_1382601039487_30">Thanks</span></div>
<div id="yiv0668673228yui_3_13_0_rc_1_9_1382601039487_71"
style="color:rgb(0, 0,
0);font-size:16px;font-family:times new roman, new york,
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serif;background-color:transparent;font-style:normal;"><span
id="yiv0668673228yui_3_13_0_rc_1_9_1382601039487_30">Zaman<br
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</span></div>
<div class="yiv0668673228yahoo_quoted"
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<div dir="ltr"> <font face="Arial" size="2"> On
Tuesday, 22 October 2013 4:58 PM, Elvir Kuric
<a class="moz-txt-link-rfc2396E" href="mailto:ekuric@redhat.com"><ekuric@redhat.com></a> wrote:<br
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<div class="yiv0668673228moz-cite-prefix">On
10/22/2013 12:17 PM, Zama Ques wrote:<br
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<div>My local partitions are
detected as multipath device <br
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</div>
<pre><code>$multipath -l
mpathb (360014380125d90420000a000003e0000) dm-9 HP,HSV450
size=200G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=0 status=active
`- 3:0:0:1 sdb 8:16 active undef running
mpatha (3600508b1001c02143bc59c6862d97353) dm-0 HP,LOGICAL VOLUME
size=137G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=0 status=active
`- 0:0:0:1 sda 8:0 active undef running
</code></pre>
<div>I added the following lines in
multipath.conf so that local
partitions are not considered as
multipath device</div>
<pre><code>blacklist {
wwid 3600508b1001c02143bc59c6862d97353
}
</code></pre>
<div>Executed the following commands
after that .</div>
<pre><code>#service multipathd reload
# multipath -F
Oct 22 12:10:42 | mpathb: map in use
Oct 22 12:10:42 | mpatha: map in use
</code></pre>
<div>So , tried rebooting the server
, but no luck . Any clues to
resolve the issue will be highly
appreciated . <br clear="none">
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<div
class="yiv0668673228yui_3_13_0_rc_1_1_1382601039487_23365"
style="color:rgb(0, 0,
0);font-size:16px;font-family:times
new roman, new york, times,
serif;background-color:transparent;font-style:normal;">Thanks</div>
<div
class="yiv0668673228yui_3_13_0_rc_1_1_1382601039487_23366"
style="color:rgb(0, 0,
0);font-size:16px;font-family:times
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serif;background-color:transparent;font-style:normal;">Zaman<br
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<tt>hi,</tt><br clear="none">
<br clear="none">
<tt>/me wonders what OS ( and version ) is
in use? service multipathd relaod ...
suggest it is something RHEL based ( not
100 </tt><tt>% sure ) </tt><br
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<br clear="none">
<tt>Check /etc/multipath/* files ( if rhel 6
) and see is there WWID from above, and
also check initramfs ( RHEL 6 ) or initrd
file ( RHEL 5 ) from /b</tt><tt>oot </tt><br
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<br clear="none">
<tt>do</tt><tt> below </tt><br clear="none">
<br clear="none">
<tt># mkdir /tmp/initrdtes</tt><tt>t </tt><br
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<tt># cp /boot/initramfs-$$$$.img ( or
initrd ... ) /t</tt><tt>mp/initrdtest </tt><br
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<br clear="none">
<tt>unpack it </tt><br clear="none">
<br clear="none">
<tt># </tt><tt>cd tmp/initrdtest </tt><br
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<br clear="none">
<tt># zcat initrd.img | cpio -i </tt><br
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<br clear="none">
<tt>and check what is there for multiapth
devices written.</tt><br clear="none">
<br clear="none">
<tt>In short, I think you will need to
ensure there are not records for devices
you want to blacklist in /etc/multipath/*
( rhel 6 ) or /var/lib/multipath/* (
rhel 5 ) and rebuild initramfs / initrd (
depending is it RHEL 5 - initrd / RHEL 6
-initramfs ) once these records are not
present.Rebuilding initrd/initramfs will
pick values from /etc/multipath/* ( rhel
6 ) or /var/lib/multipath/ ( rhel 5 ) <br
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<br clear="none">
to rebuild initrd/initramfs check docs out
there but in short process is ( after you
remove records for WWID from wwid and
bindings files - read above ) <br
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<br clear="none">
<br clear="none">
RHEL 5: <br clear="none">
<br clear="none">
# cd /boot<br clear="none">
# cp initrd-$(uname -r).img initrd-$(uname
-r).img.backup [ make backup ] <br
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# mkinitrd -v -f initrd-$(uname -r).img <br
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# reboot ( to boot to new initramfs ) <br
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<br clear="none">
RHEL 6: <br clear="none">
<br clear="none">
same as above with small corrections ;) <br
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<br clear="none">
</tt><br clear="none">
<tt><tt># cd /boot<br clear="none">
# cp initramfs-$(uname -r).img
initramfs-$(uname -r).img.backup [ make
backup ] <br clear="none">
# dracut -v -f initramfs-$(uname -r).img
<br clear="none">
# reboot ( to boot to new initramfs ) <br
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<br clear="none">
</tt></tt><br clear="none">
<tt><tt><tt> good reading <a
moz-do-not-send="true"
rel="nofollow" shape="rect"
class="yiv0668673228moz-txt-link-freetext"
target="_blank"
href="https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/DM_Multipath/config_file_blacklist.html">https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/DM_Multipath/config_file_blacklist.html</a>
</tt> <br clear="none">
<br clear="none">
hope this helps <br clear="none">
<br clear="none">
Kind regards, <br clear="none">
</tt><br clear="none">
</tt>
<pre class="yiv0668673228moz-signature">--
Elvir Kuric, Senior Technical Support Engineer / Red Hat / GSS EMEA / </pre>
</div>
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<br clear="none">
<div class="yiv0668673228yqt1326583840"
id="yiv0668673228yqt38721">-- <br
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Linux-cluster mailing list<br clear="none">
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<tt>Cool, thank you for feedback.If you are Red Hat customer and
have valid contract, use benefit of subscription and next time you
have problem with RHEL open case via Red Hat customer portal
<a class="moz-txt-link-freetext" href="https://access.redhat.com">https://access.redhat.com</a><br>
<br>
Kind regards, <br>
<br>
Elvir Kuric <br>
<br>
</tt>
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