Tape devices for BLKSIZE greater than 64K-1.  You have to chain a number of 
CCW's together for a BLKSIZE=256K.

Chris Blaicher
Principal Software Engineer, Software Development
Syncsort Incorporated
50 Tice Boulevard, Woodcliff Lake, NJ 07677
P: 201-930-8260  |  M: 512-627-3803    
E: [email protected]


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf 
Of Gerhard Postpischil
Sent: Monday, December 09, 2013 12:54 PM
To: [email protected]
Subject: Re: "hexadecimal"?

On 12/9/2013 11:53 AM, Scott Ford wrote:
> Bill,
> I thought you could chain ccws

I think you misread his message, which started with command chaining. 
But I would be interested in which control units and controllers allow data 
chaining beyond 65KiB.

Gerhard Postpischil
Bradford, Vermont

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