A few months ago I assisted a customer who was having difficulty installing 
SimpList. The installation instructions specify the sequential data set the 
XMIT files are uploaded to MUST be allocated as BLKSIZE=3120, but the installer 
specified BLKSIZE=0. I don't remember exactly what problem this caused, but I 
do know that once the BLKSIZE was changed to 3120 the installation went 
smoothly.

Dave Salt

SimpList(tm) - try it; you'll get it! 

http://www.mackinney.com/products/program-development/simplist.html  


> Date: Mon, 22 Jul 2013 15:32:37 -0400
> From: [email protected]
> Subject: Re: BLKSIZE=3120
> To: [email protected]
> 
> > If there are any restrictions, they should be APAR'ed.  3120, 6160, 
> > 6144, etc. is SO 20th century.  It's amazing to me how many IBM and OEM 
> > products still ship these crappy blocksizes.  It's why I submitted a 
> > SHARE requirement to have AMATERSE support SDB.  Isn't it ironic that a 
> > utility designed to save DASD space uses a 6144 blocksize and actually 
> > wastes DASD?
> 
> 
>   I have seen an AMATERSE requirement that was submitted for this and
> we did investigate the AMATERSE code.
> 
>   AMATERSE doesn't require the blocksize of the output data set
> for a pack operation to be 6144.  If a blocksize has not already
> been determined before AMATERSE tries to OPEN the data set, then 
> AMATERSE assigns a blocksize of 6144, which was a reasonable thing
> to do when AMATERSE was designed (before the existence of SDB). 
> If you explicitly assign a blocksize when you allocate the
> data set, AMATERSE will use your blocksize.
> 
>  Changing AMATERSE to avoid assigning a blocksize of 6144, so
> that SDB can to its thing, appears to be a fairly easy code 
> change, and I do anticipate that it will get done at some point in
> the future.
> 
> 
> 
> Jim Mulder   z/OS System Test   IBM Corp.  Poughkeepsie,  NY
> 
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