A PDSE / HFS can have 123 extents. In the SMS world, extended format sequential 
datasets have the same limitation. VSAMs are limited to 255 extents per 
component/stripe in a non-SMS environment. 


Vriendelijke Groeten / Cordialement / Best Regards / Med Vänliga Hälsningar

Kevin Somers 
System Engineering Mainframe 
Volvo IT Belgium 
Dept 36300, Mainframe Services 
Eksaardserijweg 188 
B-9041 Gent, Belgium 

Telephone: +32 (0)9 255 62 60 / Cell phone: +32 (0)478 84 39 41 
E-mail: [email protected] 


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of 
larry macioce
Sent: woensdag 8 april 2009 16:04
To: [email protected]
Subject: Secondary space allocation

I was doing some reading,which is scary in it's own right, and came across
something that I need to verify.I always thought when you gave a secondary
space allocation that it went to 16 extents(if needed), but I am reading
that it now goes to 123.
Is this true?? We are a non sms shop.
One more question, does the system check for all secondary allocations or
will it work 1 by 1 as needed?
thanks
Larry

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