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i_at_forum
New User
Joined: 29 Dec 2005
Posts: 10
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Hi,
Can anyone kindly tell me what is the maximum allowed primary & secondary allocation for TRK.
Thanks for ur help !!! |
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expat
Global Moderator
Joined: 14 Mar 2007
Posts: 8797
Location: Welsh Wales
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A dataset can not have more than 63356 tracks allocated in total.
How you allocate that depends entirely up to you, and of course your DASD architecture |
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gcicchet
Senior Member
Joined: 28 Jul 2006
Posts: 1702
Location: Australia
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Hi expat,
I can't agree with the 63356 tracks allocated in total, I can see on my system datasets well in excess of this figure.
| Code: |
- Enter "/" to select action Tracks %Used XT Device
-----------------------------------------------------------------------
XXXX.XXXX.XXXXXXX 189720 100 40 3390
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Primary space allocation cannot exceed 65535 TRKS .
Gerry |
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expat
Global Moderator
Joined: 14 Mar 2007
Posts: 8797
Location: Welsh Wales
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Oooooooooooooooooops, I think I meant to say per volume 
Although, that may now be surpassed with later releases of z/OS ???
Will need to check up on that one if I get a chance. |
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nevilh
Active User
Joined: 01 Sep 2006
Posts: 262
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following is from single volume allocation
Tracks %Used XT Device
xxx.xxx.xxx.xxx 132435 81 18 3390 |
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gcicchet
Senior Member
Joined: 28 Jul 2006
Posts: 1702
Location: Australia
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Hi,
yes it depends on the device type.
| Code: |
** Table of 3390 Device Characteristics **
Device Model: Model 1 Model 2 Model 3 Model 9
Density: Single Double Triple Mod 9
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Tracks per Cylinder: 15 15 15 15
Tracks per Device: 16,695 33,390 50,085 150,255
Cylinders per Device: 1,113 2,226 3,339 10,017
Avg Seek Time: 9.5m 12.5m 15.0m 22.5m
Bytes per Track: 56,664 56,664 56,664 56,664
Bytes per Cylinder: 849,960 849,960 849,960 849,960
Bytes per Device: 946 Meg 1.89 Gig 2.84 Gig 8.51 Gig
Bytes/Unit: 3.78 Gig 7.57 Gig 11.34 Gig 68.11 Gig
Note: Gig=Gigabytes, Meg=Megabytes, m=milliseconds
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Gerry |
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