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To get LRECL of a Tape file in CLIST


IBM Mainframe Forums -> CLIST & REXX
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toonmoon

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Joined: 27 Jul 2007
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Location: chennai

PostPosted: Fri Jul 27, 2007 9:45 pm
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Hi,

How can we get the tape LRECL through CLIST.

If we can get it thru REXX also it is fine. I have tried LISTDSI and LISTC
and could not get LRECL information. Is there any other way.
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expat

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PostPosted: Sat Jul 28, 2007 1:00 pm
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Take a look at the TMS software in use at your shop.
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toonmoon

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PostPosted: Tue Jul 31, 2007 3:29 pm
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What is TMS software and how can i get info. bout that.
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Anuj Dhawan

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Joined: 22 Apr 2006
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PostPosted: Tue Jul 31, 2007 4:26 pm
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Hi,

This may help:

Tape Management System(TMS): A program product or application that oversees tape operations. Tape management systems typically manage the enterprise's tape inventory, control user authorization to tape volumes, and request tape mounts on behalf of the user.

System people, at your site, can help you to find which TMS software is in use at your shop.
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Anuj Dhawan

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PostPosted: Wed Aug 01, 2007 12:59 pm
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Hi,

Not sure how to do this in CLIST, but
Quote:
Is there any other way.
tells me to share this JCL
Code:
//*                               
//STEP010  EXEC PGM=SYNCTOOL       
//TOOLMSG  DD  SYSOUT=*           
//DFSMSG   DD  SYSOUT=*           
//DD01     DD  DSN=TAPE_FILE_NAME,
//             DISP=SHR           
//TOOLIN   DD  *                   
   COUNT FROM(DD01)               
/*                                 
//*                               

For characteristics of tape look
Code:
//TOOLMSG
//DFSMSG

You'll find something like:
Code:
WER108I  DD01     : RECFM=FB   ; LRECL=  2250; BLKSIZE= 31500


Hope this helps.
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expat

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PostPosted: Wed Aug 01, 2007 1:40 pm
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Or you could use REXX - the basic REXX code to invoke CSI is usually included in SYS1.SAMPLIB(IGGCSIRX)

But you will need to amend it to get the bits that you want rather than the output from the way it is coded there.

Here's a link to the manual too

http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/DGT2C130/B.0?DT=20040708120541
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tatasteed

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Joined: 18 Sep 2007
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PostPosted: Thu Jan 22, 2009 10:04 pm
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This posting matches exactly my requirement.
I have been trying to find the information outlined but I was unable.
Is there any code available as sample?
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expat

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PostPosted: Thu Jan 22, 2009 10:33 pm
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SYS1.SAMPLIB (IGGCSIRX) is a good place to start.

Click HERE for the documentation of CSI.
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Bill Dennis

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Joined: 17 Aug 2007
Posts: 562
Location: Iowa, USA

PostPosted: Thu Jan 22, 2009 11:47 pm
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I don't see how you'll get tape DCB info using IGGCSIRX.

Depending on the TMS installed at your site, there may be methods to query the tape management catalog to find the info without actually reading the tape (as in the SYNCTOOL example). I have done this with a program for CA-1 and made it work from 3.4 using a command 'T'.
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tatasteed

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PostPosted: Fri Jan 23, 2009 3:03 am
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Hi,
I followed the link and the documents in SYS1.SAMPLIB (IGGCSIRX) but cannot see how to retrieve LRECL and Record Format from there.

I am afraid that I need an example.

Thanks!
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gcicchet

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Joined: 28 Jul 2006
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Location: Australia

PostPosted: Fri Jan 23, 2009 3:59 am
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Hi Anuj,

the only problem I see with your example is that entire file is going to be read, reading 1 record only sholud be sufficient.


Gerry
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expat

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PostPosted: Fri Jan 23, 2009 12:14 pm
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Bill Dennis wrote:
I don't see how you'll get tape DCB info using IGGCSIRX.


tatasteed wrote:
Hi,
I followed the link and the documents in SYS1.SAMPLIB (IGGCSIRX) but cannot see how to retrieve LRECL and Record Format from there.


There is a field in the manual (catalog field names - C.6.1 ) called LRECL which contains the LRECL of the file in question. All that needs to be done is to amend the REXX to extract it.
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Bill Dennis

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Location: Iowa, USA

PostPosted: Fri Jan 23, 2009 8:54 pm
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expat wrote:
There is a field in the manual (catalog field names - C.6.1 ) called LRECL which contains the LRECL of the file in question. All that needs to be done is to amend the REXX to extract it.

That field may be present for VSAM files but I would bet anything that the catalog entry won't return the LRECL for tapes and other non-VSAM files.
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