Good question..

First my sentence should have read  "nsrclone can hang indefinitely reading
the source
tape if there is a write error on the target tape."

I did have the target tape drive replaced after noticing that 3 out 4 of my
write errors were
on that drive.   That said,  the problem manifested itself with networker
not releasing the
source drive (drive being read from).  It goes on to use the target tape
drive later in the night
that had the write error.
I suppose the drive, if bad, may not send a proper signal to the nsrclone
process?

Legato seemed to think it belonged to this bug/issue number.   I tend to
agree,  if nsrclone gets
an error writing to a tape it should deal with it in some coherent way
(fail?).   In my case it
appears that the root cause of the write errors may have been the drive.

Robert Maiello
Thomson Healthcare


 -----Original Message-----
From:   David Chapa [mailto:david.chapa AT adic DOT com]
Sent:   Wednesday, March 17, 2004 11:13 AM
To:     Legato NetWorker discussion; Robert Maiello
Subject:        RE: [Networker] Cloning

Does this seem to be an nsrclone issue specifically or drive/media
issue?

David A. Chapa * Technical Advisor, Technical Marketing * ADIC *
720.249.5836 * david.chapa AT adic DOT com

The FUTURE is HERE - http://www.adic.com/gopathlightvx


-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTMAIL.TEMPLE DOT EDU]
On Behalf Of Robert Maiello
Sent: Tuesday, March 16, 2004 2:18 PM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: Re: [Networker] Cloning

All,

I had jumped on this thread (sorry) with an issue with my nsrclones
hanging
when a SCSI write error was encountered.   I did find the source of my
write errors to be one drive.   Still, it would seem nsrclone can hang
indefinitely reading the source tape if the tape tape has a SCSI write
error.

Legato has added me (and this behavior) to LGTpa60542. No hotfix for
7.1.1
yet..may have to wait for next release.


Robert Maiello
Thomson Healthcare


On Mon, 8 Mar 2004 11:27:31 -0600, Paula Ehn <pehn AT CC.UMANITOBA DOT CA>
wrote:

>Solaris 8/ Networker 7.0
>
>We are certainly having a similar problem here only we are running in a
Solaris
>environment. I had a Legato case open before Christmas but they kept
blaming the
>tape drive hardware. At the time, it had only occured once on that
drive but
>since has occured many times and at least once on all our drives. I
admit, our
>present backup server is under-powered for what it is doing but we are
upgrading
>it very shortly. I still can't believe that is it because it was
working fine
>until I upgraded from Networker 6.1.3 to 7.0.
>
>When I find it in this "hung/SuperSlow" state, I just kill the nsrclone
process
>and play catchup later by running the nsrclone command manually. It
annoys
me to
>no end when it happens on a weekend!
>
>We did just get a bunch of new tapes of which were delivered to us when
it was
>-40C outside. A couple in the batch have already had issues and been
marked
full
>far too early. I could see how this might be related to the cloning
problem as
>it's happened more frequently since we started using tapes from this
new batch.
>
>Paula
>
> -----------------------------------------------------------------
>| Paula Ehn  VE4MHZ/VE4HZ                    Room 624 Eng.        |
>| Unix System Administrator                  pehn AT cc.umanitoba DOT ca |
>| Academic Computing and Networking          (204)474-7849        |
>| University of Manitoba                     Fax: (204) 474-7920  |
> -----------------------------------------------------------------
>
>On Fri, 5 Mar 2004 14:53:59 -0500, Robert Maiello
><robert.maiello AT THOMSON DOT COM> wrote:
>>
>>I've found with version 7.1.1 on Unix the cloning behavoir has
changed.
>>If we encounter an error on the tape being written to nsrclone
hangs/never
>>finishes.  In the morning I see the clone is running, the source tape
is
>>reading but nothing is being written to.  A look at the drive being
read
>>from reveals its not really being read.
>>
>>I know this is quite the problem you have but something definitely
changed
>>in this version.  In 6.x the clone would fail on tape write errors and
>>the drives would be free.
>>
>>Has anyone notice this or Brian's problem when cloning in version
7.x??
>>
>>
>>I also have a case open with Legato.
>>
>>Robert Maiello
>>Thomson Healthcare
>>
>>
>>On Fri, 5 Mar 2004 08:10:21 -0500, Spindler, Brian
>><brian.spindler AT RUESCH DOT COM> wrote:
>>
>>>Networker 7.1, Windows 2000
>>>
>>>OK! I need some real help here with Cloning.  My Clone Sets NEVER
>>>complete.  Every morning when I come in the cloning sessions are
still
>>>running and when I look at the status they are "writing, idle" and
>>>"reading, done".  When I look at the perfmon counters for "Write
>>>kilobyte / sec" there is no activity whatsoever.  How can I make sure
>>>that my clones continue to run as scheduled?  AND if they are hung
how
>>>can I nudge them along?  Any help would be greatly appreciated!
>>>
>>>
>>>Thanks,
>>>Brian
>
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