Replying to my own post.... when you cancel a scheduled backup session,
here is what I would expect to see. Note the key message, ANS1369E.

---------------------------------------------------------
Normal File-->      <file_size> <file_name>  ** Unsuccessful **

ANS1809W A session with the TSM server has been disconnected. An attempt
will be made to reestablish the connection.
... failedtion attempt will be made in 00:00:00

Total number of objects inspected:        2,640
Total number of objects backed up:          207
   ...  [snip ending stats]
Elapsed processing time:               00:02:07
ANS1369E Session Rejected: The session was canceled by the server
administrator.

ANS1512E Scheduled event 'STANDARD' failed.  Return code = 12.
Sending results for scheduled event 'STANDARD'.
Results sent to server for scheduled event 'STANDARD'.

TSM Backup-Archive Client Version 7, Release 1, Level 1.1
Querying server for next scheduled event.
Node Name: RAIBECK
---------------------------------------------------------

Regards,

- Andy

____________________________________________________________________________

Andrew Raibeck | Tivoli Storage Manager Level 3 Technical Lead |
storman AT us.ibm DOT com

IBM Tivoli Storage Manager links:
Product support:
http://www.ibm.com/support/entry/portal/Overview/Software/Tivoli/Tivoli_Storage_Manager

Online documentation:
http://www.ibm.com/support/knowledgecenter/SSGSG7/welcome
Product Wiki:
https://www.ibm.com/developerworks/community/wikis/home/wiki/Tivoli%20Storage%20Manager

"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> wrote on 2015-02-10
11:28:51:

> From: Andrew Raibeck/Hartford/IBM@IBMUS
> To: ADSM-L AT VM.MARIST DOT EDU
> Date: 2015-02-10 11:37
> Subject: Re: Stopping a client backup
> Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
>
> Hi Harold,
>
> This is interesting... what method are you using the cancel the client
> sessions? If you cancel the session from the admin client (CANCEL SESSION
> command), then the client should recognize that the session was cancelled
> by a TSM server administrator and not re-try the backup (though it may
> reconnect to report backup status).
>
> - Andy
>
>
____________________________________________________________________________

>
> Andrew Raibeck | Tivoli Storage Manager Level 3 Technical Lead |
> storman AT us.ibm DOT com
>
> IBM Tivoli Storage Manager links:
> Product support:
> http://www.ibm.com/support/entry/portal/Overview/Software/Tivoli/
> Tivoli_Storage_Manager
>
> Online documentation:
> http://www.ibm.com/support/knowledgecenter/SSGSG7/welcome
> Product Wiki:
> https://www.ibm.com/developerworks/community/wikis/home/wiki/Tivoli%
> 20Storage%20Manager
>
> "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> wrote on 2015-02-10
> 11:21:16:
>
> > From: "Vandeventer, Harold [OITS]" <Harold.Vandeventer AT KS DOT GOV>
> > To: ADSM-L AT VM.MARIST DOT EDU
> > Date: 2015-02-10 11:23
> > Subject: Re: Stopping a client backup
> > Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
> >
> > I'll investigate LOCK NODE.
> >
> > I've tried creating an Option Set with COMMRESTARTDURATION and
> > COMMRESTARTINTERVAL but Admin Center 6.3.4.300 insists those are
> > invalid options.
> >
> > I'm experimenting with my workstation node, and modified my
> > preferences for those comm settings.  Then tried to copy the option
> > name into Admin Center.... but not a valid option name apparently.
> >
> > Help in the baclient GUI indicates a server side option can override
> > the node dsm.opt value.
> >
> > I'll try the new Operations Center, but not holding my breath there.
> >
> >
> >
> > -----Original Message-----
> > From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On
> > Behalf Of Skylar Thompson
> > Sent: Tuesday, February 10, 2015 9:52 AM
> > To: ADSM-L AT VM.MARIST DOT EDU
> > Subject: Re: [ADSM-L] Stopping a client backup
> >
> > "LOCK NODE" ought to do the trick. Or, if it's just a scheduled
> > task, expire the schedule - "UPD SCH <domain> <sch-name>
EXPIR=today-1".
> >
> > On Tue, Feb 10, 2015 at 03:47:22PM +0000, Vandeventer, Harold [OITS]
> wrote:
> > > I've been fighting a scheduled backup issue for one node.
> > Probably a firewall issue.
> > >
> > > But, to keep management happy, a successful TELNET <ip>
> > <portnumber> will not suffice.
> > >
> > > I need to cancel the backup due to bandwidth issues across the
> > wire during daytime hours.  The normal schedule won't run until late
> > in the evening.
> > >
> > > I've tried cancelling sessions, but the node end is re-
> > establishing sessions to keep the backup running.
> > >
> > > So, the question: How can I start a scheduled backup, then, once I
> > see it is working, cancel it?
> > >
> > > Thanks.
> > >
> > > ------------------------------------------------------------
> > > Harold Vandeventer
> > > Systems Programmer
> > > State of Kansas - Office of Information Technology Services STE 751-S
> > > 910 SW Jackson
> > > (785) 296-0631
> > >
> > >
> > > [Confidentiality notice:]
> > >
***********************************************************************
> > > This e-mail message, including attachments, if any, is intended for
the
> > > person or entity to which it is addressed and may contain
confidential
> > > or privileged information.  Any unauthorized review, use, or
disclosure
> > > is prohibited.  If you are not the intended recipient, please contact
> > > the sender and destroy the original message, including all copies,
> > > Thank you.
> > >
***********************************************************************
> >
> > --
> > -- Skylar Thompson (skylar2 AT u.washington DOT edu)
> > -- Genome Sciences Department, System Administrator
> > -- Foege Building S046, (206)-685-7354
> > -- University of Washington School of Medicine
> >