Max Space of primary and secondary

suriya · New User Joined: 19 Apr 2006 Posts: 4

Hi all,

If any one knows the max space quantity allocated for the Primary and secondary quantity for PS or PDS

prasaar · New User Joined: 11 Dec 2006 Posts: 21 Location: India

Hi,

The MAX space that u can allocate for a DS depends on the storage medium and the space available on that volume.

In DASD 3390 model, you have 1,2,3,27. If your shop is using 3390-3, then you will have 3330 cylinder's of space available for that empty volume.

Space allocation happens in extents, to allocate the maximum primary space for a DS in a DASD volume, check the largest free # of cylinders available and use that number to create the DS with a large primary qty. The secondary space is not contiguous(there are parameters in SPACE that can be used to ask for contiguous space) and hence, the maximum, qty only depends on the storgae size of your shop.

Hope this helps.

Rgds,
Arun Prasad

prakash.ammasi · New User Joined: 04 Apr 2007 Posts: 8 Location: chennai

Space Parameter :
U can calculate the , [Space Parameter = No of records * record length]which gives u Total Bytes occupied by the File. From this u allocate the File using TRKS.
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expat · Posted: Thu Aug 09, 2007 9:45 pm

The maximum number of tracks that can be alloacted to any dataset on any one volume is 65536.

So in effect the maximum number you can allocate to your dataset is 59 (max number of volumes allowed for DASD) * 65536 tracks.