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[Veritas-bu] Error52
2004-04-13 01:50:36
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HI All
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I would appreciate any feedback with regards to the following
problem.....
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Environment
Netbackup 4.5_5 (MP).
Master - Solaris 8 - No other applications (dedicated as nbu master).
Media servers - Solaris 8 and W2K (service pack 4) - Total of 8.
Clients - Solaris 8 and W2K (service pack 4) - Total of 200.
Library - ADIC 10K with QLOGIC switch (SanBox2) and QLOGIC routers (SNC
5000's) with 15 SSO drives.
=20
Problem
For the last three months I have encountered persistent error 52's at
one of my sites. It appears that during peak schedules the "maximum
number of drives" configured on the storage unit is not adhered to, e.g.
I have two media servers sharing the same two drives in the library. My
storage unit on both media servers are setup to use a maximum number of
2 drives and the maximum streams are set to 4. I then put these storage
units into a storage group and define the storage group on my policy.
When my peak schedule starts I noticed that the two media servers in
question will have a total of 13 jobs active - not 8. Four jobs start on
media server 1 and use tape1. Another four jobs start on media server 2
and utilizes tape2. Now there are still 5 jobs left and active and the
media servers try to load another two tapes (one on each media server).
These jobs then fail with error 52 and requeue until the number of
retries and then fail. I have now altered the maximum drives to 1 each,
but still have the same problem, although less.=20
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I currently have a case pending with Veritas and did the following
changes......
1. Removed the /usr/openv/volmgr/DISABLE_RESOURCES_BUSY touch
file.=20
2. Any storage units not being used for backups, please set the
storage unit drive count to 0. I believe your master server is a
candidate here.
3. Added the latest drive and robot mappings.=20
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=20
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Bertie Booysens
Tel: +27 11 808 6507
Fax: +27 11 808 6210
Mobile: +27 82 492 1410
Email: bbooysens AT stortech.co DOT za
=20
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<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>HI All</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>I would appreciate any feedback with regards to the
following problem…..</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Environment</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Netbackup 4.5_5 (MP).</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Master – Solaris 8 – No other =
applications
(dedicated as nbu master).</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Media servers – Solaris 8 and W2K (service pack =
4) –
Total of 8.</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Clients – Solaris 8 and W2K (service pack 4) =
–
Total of 200.</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Library – ADIC 10K with QLOGIC switch (SanBox2) =
and
QLOGIC routers (SNC 5000’s) with 15 SSO drives.</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Problem</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>For the last three months I have encountered =
persistent
error 52’s at one of my sites. It appears that during peak =
schedules the “maximum
number of drives” configured on the storage unit is not adhered =
to, e.g.
I have two media servers sharing the same two drives in the library. My =
storage
unit on both media servers are setup to use a maximum number of 2 drives =
and
the maximum streams are set to 4. I then put these storage units into a =
storage
group and define the storage group on my policy. When my peak schedule =
starts I
noticed that the two media servers in question will have a total of 13 =
jobs
active – not 8. Four jobs start on media server 1 and use tape1. =
Another
four jobs start on media server 2 and utilizes tape2. Now there are =
still 5
jobs left and active and the media servers try to load another two tapes =
(one
on each media server). These jobs then fail with error 52 and requeue =
until the
number of retries and then fail. I have now altered the maximum drives =
to 1
each, but still have the same problem, although less. </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>I currently have a case pending with Veritas and did =
the
following changes……</span></font></p>
<ol start=3D1 type=3D1>
<li class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Removed the =
/usr/openv/volmgr/DISABLE_RESOURCES_BUSY
touch file.</span></font> </li>
<li class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Any storage units not being used for backups, =
please
set the storage unit drive count to 0. I believe your master =
server
is a candidate here.</span></font></li>
<li class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Added the latest drive and robot mappings. =
</span></font></li>
</ol>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Bertie Booysens</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Tel: +27 11 808 6507</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Fax: +27 11 808 6210</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Mobile</span></font><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>: +27 82 492 =
1410</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Email: bbooysens AT stortech.co DOT za</span></font></p>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'> </span></font></p>
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