<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"MS Sans Serif";
panose-1:0 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:"Microsoft Sans Serif";
panose-1:2 11 6 4 2 2 2 2 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
p
{mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman";}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"MS Sans Serif";
color:windowtext;
font-weight:normal;
font-style:normal;
text-decoration:none none;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><font size=2 face="MS Sans Serif"><span style='font-size:
10.0pt;font-family:"MS Sans Serif"'>My comments are below.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="MS Sans Serif"><span style='font-size:
10.0pt;font-family:"MS Sans Serif"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>-----Original
Message-----<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>From:
dm-devel-bounces@redhat.com [<a href="mailto:dm-devel-bounces@redhat.com">mailto:dm-devel-bounces@redhat.com</a>]
On Behalf Of Mike Christie<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>Sent:
Thursday, March 30, 2006 2:45 PM<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>To:
device-mapper development<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>Cc:
Ryan O'Hara<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>Subject:
Re: Fwd: [dm-devel] IO error on DM device<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>Jonathan
E Brassow wrote:<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>>
<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>>
Another observation is that we are not seeing any IO errors when the<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>>
same test is executed on SLES9 SP3/SP4. <o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>>
<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><b><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif";
font-weight:bold'>[Murthy]</span></font></b><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>
our other team has seen the error on SLES9 too. The Qlogic driver is same
as RHEL ones, so we have to see similar behaviour.<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>I
think Ryan's post is correct, but I wonder why the SLES9 is not returning
errors. Was the SLES statement referring to the scsi errors you see in the log
like this:<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>
Feb 1 11:47:45 apwtest52 kernel: SCSI error : <3 0 0 1> return code<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>
= 0x20000<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>or
the dm-multipath and block layer messages<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span lang=DE style='font-size:10.0pt;font-family:
"Microsoft Sans Serif"'>Feb 1 11:48:40 apwtest52 kernel: device-mapper:
dm-multipath:<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span lang=DE style='font-size:10.0pt;font-family:
"Microsoft Sans Serif"'> </span></font><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>Failing
path 8:32.<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>
Feb 1 11:48:40 apwtest52 kernel: Buffer I/O error on device dm-0,<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>
logical block 116940 u<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>or
both?<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>Do
you have the same dm-multipath settings (queue if no path, etc)? <b><span
style='font-weight:bold'>[Murthy] yes</span></b><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'> Is
this is the qlogic qla2xxx driver? <b><span style='font-weight:bold'>[Murthy] yes</span></b><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'> Are
there qlogic guys on the list that would know if there are any differences
between the SLES and RHEL drivers or are we going to have to dig in there? Are
there differences between the SLES and RHEL dm multipath drivers? Does this
occur with the upstream kernel?<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>--<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>dm-devel
mailing list<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2
face="Microsoft Sans Serif"><span style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'>dm-devel@redhat.com<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Microsoft Sans Serif"><span
style='font-size:10.0pt;font-family:"Microsoft Sans Serif"'><a
href="https://www.redhat.com/mailman/listinfo/dm-devel">https://www.redhat.com/mailman/listinfo/dm-devel</a></span></font><o:p></o:p></p>
</div>
</body>
</html>