Sit Nick the Ardent:

Confession is good for the soul.  Sort of...

Could it be that your predecessor wrote the code for SPTAPE?  SPTAPE did 
not support Standard Labels. 

Thus, your predecessor might have been playing it safe by ensuring that 
the tape was writable (tab turned to write; old school: "ring in"), would 
use ANY mounted tape, even if it was not yet initialized.  Also, by 
placing 10 tape marks on the tape, that if anything went wrong with the 
SPTAPE DUMP it would be more clear that nothing was actually dumped - so 
he/she did not use data from a previous non-labeled SPTAPE DUMP.

:public_flogging on 
To quote: "Now I find that after a week of this, mounts of these seven 
volumes are failing because there's not standard label on these tapes.". 
But you didn't run an initial, manual test of the whole process -- running 
the actual code making the backups?  And check the results manually? 
And... you let it run for a week without checking the results at *all*? 
You're getting too old for that sort of mistake!  :-) 

[14th century. Via Old French ardant < Latin ardent-, present participle 
of ardere "to burn"]
:public_flogging off 

Mike Walter
Hewitt Associates
The opinions expressed herein are mine alone, not my employer's.




"Nick Laflamme" <[EMAIL PROTECTED]> 

Sent by: "The IBM z/VM Operating System" <[email protected]>
03/20/2006 10:04 AM
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"The IBM z/VM Operating System" <[email protected]>



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Re: SPXTape & standard labels?






Nick Laflamme wrote:
> In an attempt to bullet-proof my system from Yet Another Mistake 
> Operators Make, I used TAPE WVOL1 to put standard labels on the seven 
> cartridges we use for nightly SPXTAPE dumps and changed how our 
> DUMPNSS SVM invokes our home-grown TMS so it now asks the TMS to 
> verify the label on the tape before the drive is attached to the SVM.
>
> I also ran manual tests in which I did SPXTAPE dumps to each of the 
> seven tapes after labelling them, rewound them, and made sure that 
> TAPE DVOL1 still showed a tape label. It seemed to work as I expected.
>
> Now I find that after a week of this, mounts of these seven volumes 
> are failing because there's not standard label on these tapes.
>
> Is what I'm trying supposed to work?

I don't know how to put an explanation into the list archives without 
also making all of you read it, so, here goes....

My predecessor put code into the routine that calls SPXTAPE to first:

TAPE WTM 10

Yeah, that'll nuke a volume label, just a little bit. Otherwise, what 
I'm trying to do should work just fine.

Gun, bullet, foot, predecessor's trigger finger!

Sigh,
Nick




 
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