There is at least one TSO ZAP command on the CBT tape. It's very useful for 
examining DASD data. You don't actually need to alter any data; just look at 
it. The command is highly agnostic and will read pretty much any block. It 
won't tell you how an RDW got broken, but it can show the results in 
full-screen mode. It requires no programming. 

.
.
.
J.O.Skip Robinson
Southern California Edison Company
Electric Dragon Team Paddler 
SHARE MVS Program Co-Manager
323-715-0595 Mobile
626-302-7535 Office
[email protected]

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf 
Of Reichman Joseph
Sent: Tuesday, July 19, 2016 8:16 AM
To: [email protected]
Subject: (External):Re: Bsam VS Qsam for VB records

With RECFM=U there is 1 record per block and the BDW is RDW + 4 ?

Joe Reichman
Joe Reichman
 
IT Specialist
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-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf 
Of John McKown
Sent: Tuesday, July 19, 2016 10:57 AM
To: [email protected]
Subject: Re: Bsam VS Qsam for VB records

On Tue, Jul 19, 2016 at 9:54 AM, Pew, Curtis G <[email protected]
> wrote:

> On Jul 19, 2016, at 9:39 AM, Reichman Joseph <[email protected]>
> wrote:
> >
> > I am not thinking of moving this in production it may help me track 
> > down
> a problem
>
> If your motivation is to examine the physical blocks, why not read 
> with QSAM specifying RECFM=U?
>

​That is what I do, with: RECFM=U,LRECL=32756,BLKSIZE=32760 and then use QSAM 
and "have fun".​ Or not, as the case may be.



>
> --
> Pew, Curtis G
> [email protected]
> ITS Systems/Core/Administrative Services


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