[Veritas-bu] netbackup media servers losing connections to drives throug

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Hi,

  I am using Netbackup 4.5 in a Windows2000 environment.  There is the
following SSO configuration:

An ADIC Scalar1000 with 24 AIT-3 drives attached to 6 SNCs (storage
network controllers - fibrechannel-to-scsi bridges).

The SNCs are attached to Brocade Silkworm 3800 switches.

The 3 Netbackup media servers are also attached to the Silkworm 3800
switches (using Qlogic HBAs).

=20

The problem I am having is that during a backup, the media servers will
lose connection to some of the drives (you actually get the
plug-and-play message on the server that a device was disconnected).
Sometimes it is just one of the drives on an SNC, and sometimes it is
the whole SNC.  We can cycle everything (including the SNCs) and
everything will work ok for a day or two and then the same thing happens
again.  It is not limited to a specific media server, drive or SNC.

=20

Has anyone seen this problem before?  Any help is greatly appreciated.


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<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Hi,<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>&nbsp; I am using Netbackup 4.5 in a Windows2000 =
environment.&nbsp; There
is the following SSO configuration:<o:p></o:p></span></font></p>

<p class=3DMsoNormal style=3D'text-indent:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>An ADIC Scalar1000 with 24 =
AIT-3
drives attached to 6 SNCs (storage network controllers &#8211; =
fibrechannel-to-scsi
bridges).<o:p></o:p></span></font></p>

<p class=3DMsoNormal style=3D'text-indent:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>The SNCs are attached to =
Brocade Silkworm
3800 switches.<o:p></o:p></span></font></p>

<p class=3DMsoNormal style=3D'text-indent:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>The 3 Netbackup media =
servers are
also attached to the Silkworm 3800 switches (using Qlogic =
HBAs).<o:p></o:p></span></font></p>

<p class=3DMsoNormal style=3D'text-indent:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'><o:p>&nbsp;</o:p></span></fo=
nt></p>

<p class=3DMsoNormal style=3D'text-indent:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>The problem I am having is =
that
during a backup, the media servers will lose connection to some of the =
drives
(you actually get the plug-and-play message on the server that a device =
was
disconnected).&nbsp; Sometimes it is just one of the drives on an SNC, =
and sometimes
it is the whole SNC.&nbsp; We can cycle everything (including the SNCs) =
and everything
will work ok for a day or two and then the same thing happens =
again.&nbsp; It is not
limited to a specific media server, drive or =
SNC.<o:p></o:p></span></font></p>

<p class=3DMsoNormal style=3D'text-indent:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'><o:p>&nbsp;</o:p></span></fo=
nt></p>

<p class=3DMsoNormal style=3D'text-indent:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>Has anyone seen this =
problem
before?&nbsp; Any help is greatly =
appreciated.<o:p></o:p></span></font></p>

</div>

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[Veritas-bu] netbackup media servers losing connections to drives through SNCs
