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Bob,
It sounds like you are cleaning the drives too much. We have some
drives that have gone 100+ hours without needing to be cleaned. Cleaning
them too much may/will damage the heads. Also, depending on the source,
some say that when you put in a brand new DLT tape into a drive, that the
new tape actually cleans the drive.
With the newer versions of NetBackup, I believe starting with 3.2,
they have a built in feature to automatically clean the drives when a drive
needs cleaning (as long as there is an available cleaning tape).
I am not sure what would be the best thing to do about the stuck
tapes while backups are running. You may be able to "reset" the drive with
the stuck tape using NetBackup via the device management GUI. Somebody,
might have a better recommendation though.
Paul Weaver
-----Original Message-----
From: Lawrence, Bob [mailto:bob.lawrence AT primark DOT com]
Sent: Friday, January 26, 2001 12:36 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Stuck Cleaning Tapes
NBU 3.1.5 on NT4
STK9714 with 6 DLT7000
Master with 3 DLT7000 and robot arm
3 slaves, each with 1 drive in the STK9714
I have 2 problems:
1. My cleaning tapes are getting stuck far more than usual, this seems to
be when they use their last clean (20).
Anyone experienced this?
I have autocleaning on for every 25hrs of drive usage, I was advised to use
this figure, but I'm thinking it's too much.
I've disabled autocleaning for now and chucked this batch of Maxell
cleaners.
2. When a tape gets stuck, the drive goes down, so my Operators try and
remove the stuck tape manually while other backups are running to the other
drives/slaves. Last night I had multiple stuck tapes and drives down, can
this be caused by the robot door being open so the robot is "offline"?
(Door was open for quite a long time - during which another drive might have
needed a tape swap)
If this is the case, how can you remove a stuck tape when other drives are
in use?
thanks
Bob
This e-mail, its content and any files transmitted with it are intended
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_______________________________________________
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<TITLE>RE: [Veritas-bu] Stuck Cleaning Tapes</TITLE>
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<P><FONT SIZE=3D2>Bob,</FONT>
<BR> <FONT SIZE=3D2>It sounds =
like you are cleaning the drives too much. We have some drives =
that have gone 100+ hours without needing to be cleaned. Cleaning =
them too much may/will damage the heads. Also, depending on the =
source, some say that when you put in a brand new DLT tape into a =
drive, that the new tape actually cleans the drive.</FONT></P>
<P> <FONT SIZE=3D2>With the =
newer versions of NetBackup, I believe starting with 3.2, they have a =
built in feature to automatically clean the drives when a drive needs =
cleaning (as long as there is an available cleaning tape).</FONT></P>
<P> <FONT SIZE=3D2>I am not =
sure what would be the best thing to do about the stuck tapes while =
backups are running. You may be able to "reset" the =
drive with the stuck tape using NetBackup via the device management =
GUI. Somebody, might have a better recommendation =
though.</FONT></P>
<P><FONT SIZE=3D2>Paul Weaver</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>-----Original Message-----</FONT>
<BR><FONT SIZE=3D2>From: Lawrence, Bob [<A =
HREF=3D"mailto:bob.lawrence AT primark DOT com">mailto:bob.lawrence AT primark
DOT com=
</A>]</FONT>
<BR><FONT SIZE=3D2>Sent: Friday, January 26, 2001 12:36 PM</FONT>
<BR><FONT SIZE=3D2>To: veritas-bu AT mailman.eng.auburn DOT edu</FONT>
<BR><FONT SIZE=3D2>Subject: [Veritas-bu] Stuck Cleaning Tapes</FONT>
</P>
<BR>
<BR>
<P><FONT SIZE=3D2>NBU 3.1.5 on NT4</FONT>
<BR><FONT SIZE=3D2>STK9714 with 6 DLT7000</FONT>
<BR><FONT SIZE=3D2>Master with 3 DLT7000 and robot arm</FONT>
<BR><FONT SIZE=3D2>3 slaves, each with 1 drive in the STK9714</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>I have 2 problems:</FONT>
</P>
<P><FONT SIZE=3D2>1. My cleaning tapes are getting stuck far more =
than usual, this seems to</FONT>
<BR><FONT SIZE=3D2>be when they use their last clean (20).</FONT>
<BR><FONT SIZE=3D2>Anyone experienced this?</FONT>
<BR><FONT SIZE=3D2>I have autocleaning on for every 25hrs of drive =
usage, I was advised to use</FONT>
<BR><FONT SIZE=3D2>this figure, but I'm thinking it's too much.</FONT>
<BR><FONT SIZE=3D2>I've disabled autocleaning for now and chucked this =
batch of Maxell</FONT>
<BR><FONT SIZE=3D2>cleaners.</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>2. When a tape gets stuck, the drive goes down, =
so my Operators try and</FONT>
<BR><FONT SIZE=3D2>remove the stuck tape manually while other backups =
are running to the other</FONT>
<BR><FONT SIZE=3D2>drives/slaves. Last night I had multiple =
stuck tapes and drives down, can</FONT>
<BR><FONT SIZE=3D2>this be caused by the robot door being open so the =
robot is "offline"?</FONT>
<BR><FONT SIZE=3D2>(Door was open for quite a long time - during which =
another drive might have</FONT>
<BR><FONT SIZE=3D2>needed a tape swap)</FONT>
<BR><FONT SIZE=3D2>If this is the case, how can you remove a stuck tape =
when other drives are</FONT>
<BR><FONT SIZE=3D2>in use?</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>thanks</FONT>
<BR><FONT SIZE=3D2>Bob</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>This e-mail, its content and any files transmitted =
with it are intended solely for the addressee(s) and are confidential =
and may be legally privileged. Access by any other party is =
unauthorised without the express prior written permission of the =
sender. If you have received this e-mail in error you may not =
copy, disclose to any third party or use the contents, attachments or =
information in any way. Please destroy it and contact the sender =
via the Thomson Financial switchboard on (44) 207 369 7000 or via =
e-mail return. Internet communications are not secure unless =
protected using strong cryptography. This e-mail has been =
prepared using information believed by the author to be reliable and =
accurate, but Thomson Financial does not accept responsibility for the =
timeliness, accuracy or completeness of the information provided or for =
any changes to this e-mail, howsoever made, after it was sent. =
[The content of this e-mail and files transmitted with it is (c) =
TFSL - 2000] </FONT></P>
<P><FONT =
SIZE=3D2>_______________________________________________</FONT>
<BR><FONT SIZE=3D2>Veritas-bu maillist - =
Veritas-bu AT mailman.eng.auburn DOT edu</FONT>
<BR><FONT SIZE=3D2><A =
HREF=3D"http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu"; =
TARGET=3D"_blank">http://mailman.eng.auburn.edu/mailman/listinfo/veritas=
-bu</A></FONT>
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