[Cialug] Bad hd in raid?

Josh More cialug@cialug.org
Wed, 20 Apr 2005 15:19:28 -0500


--=__PartB5969C40.0__=
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit

You can use smartctl to force a test and check it afterwards. 
I will not supply a guide on how to do so, as the steps you do depend 
on the type of drive you have and what kind of tests you run, and 
I don't want to lead you down the wrong path. 
 
However, man smartctl is fairly readable, so it's not too hard. 
Just know that doing a read of a test status stops the test, 
so be sure to wait until the test is done before quering it. 
 
-- 
-Josh More, RHCE, CISSP 
 morej@alliancetechnologies.net 
 515-245-7701 
 


>>>oddvector@gmail.com 04/20/05 1:59 pm >>>
I have a disk that likes to drop out of my raid array. Here is my
current mdstat.

Personalities : [linear] [raid0] [raid1] [raid5]
read_ahead 1024 sectors
md0 : active raid5 hdh1[3] hdg1[2] hdf1[1]
     234444288 blocks level 5, 128k chunk, algorithm 2 [4/3] [_UUU]

unused devices: <none>

I'm running software raid 5 on a slackware 10.1 box. hde is the
culprit drive. The last time I had this drive drop out of the raid I
was able to add him back in with no problems. I'm also not seeing any
read/write errors in my log files.

Is there any way for me to check this disk before I stick it back into
the raid? If it was going bad shouldn't there be errors in my log
files? Should I just replace this disk?

Cialug mailing list
Cialug@cialug.org
http://cialug.org/mailman/listinfo/cialug


--=__PartB5969C40.0__=
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Content-Description: HTML

<html>
  <head>
    <style type=3D"text/css">
      <!--
        body { font-variant: normal; margin-left: 4px; line-height: =
normal; margin-bottom: 1px; margin-right: 4px; margin-top: 4px }
      -->
    </style>
   =20
  </head>
  <body style=3D"margin-left: 4px; margin-bottom: 1px; margin-right: 4px; =
margin-top: 4px">
    <DIV>      You can use smartctl to force a test and check it afterwards=
.
    </DIV>
    <DIV>I will not supply a guide on how to do so&#44; as the steps you =
do depend
    </DIV>
    <DIV>on the type of drive you have and what kind of tests you run&#44; =
and
    </DIV>
    <DIV>I don&#39;t want to lead you down the wrong path.
    </DIV>
    <DIV>&nbsp;</DIV>
    <DIV>However&#44; man smartctl is fairly readable&#44; so it&#39;s not =
too hard.
    </DIV>
    <DIV>Just know that doing a read of a test status stops the test&#44;
    </DIV>
    <DIV>so be sure to wait until the test is done before quering it.
    </DIV>
    <DIV>&nbsp;</DIV>
    <DIV>--=20
    </DIV>
    <DIV>-Josh More&#44; RHCE&#44; CISSP
    </DIV>
    <DIV>&nbsp;morej@alliancetechnologies.net
    </DIV>
    <DIV>&nbsp;515-245-7701
    </DIV>
    <DIV>&nbsp;</DIV>
    <DIV><br><br>&gt;&gt;&gt;oddvector@gmail.com 04/20/05 1:59 pm =
&gt;&gt;&gt;<br>I have a disk that likes to drop out of my raid array. =
Here is my<br>current mdstat.<br><br>Personalities : &#91;linear&#93; =
&#91;raid0&#93; &#91;raid1&#93; &#91;raid5&#93;<br>read_ahead 1024 =
sectors<br>md0 : active raid5 hdh1&#91;3&#93; hdg1&#91;2&#93; hdf1&#91;1&#9=
3;<br>&#160;&#160;&#160;&#160;&#160;234444288 blocks level 5&#44; 128k =
chunk&#44; algorithm 2 &#91;4/3&#93; &#91;_UUU&#93;<br><br>unused devices: =
&lt;none&gt;<br><br>I&#39;m running software raid 5 on a slackware 10.1 =
box. hde is the<br>culprit drive. The last time I had this drive drop out =
of the raid I<br>was able to add him back in with no problems. I&#39;m =
also not seeing any<br>read/write errors in my log files.<br><br>Is there =
any way for me to check this disk before I stick it back into<br>the =
raid&#63; If it was going bad shouldn&#39;t there be errors in my =
log<br>files&#63; Should I just replace this disk&#63;<br><br>Cialug =
mailing list<br>Cialug@cialug.org<br>http://cialug.org/mailman/listinfo/cia=
lug<br>    </DIV>

  </body>
</html>

--=__PartB5969C40.0__=--