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Calculate Space

 
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steve777
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Joined: 03 Mar 2004
Posts: 1
Topics: 1
PostPosted: Wed Mar 03, 2004 2:53 pm    Post subject: Calculate Space Reply with quote
Hello

I need to know how to calculate DASD from tracks to megabytes.

Regards,

Steve
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kolusu
Site Admin
Site Admin


Joined: 26 Nov 2002
Posts: 12365
Topics: 75
Location: San Jose
PostPosted: Wed Mar 03, 2004 3:38 pm    Post subject: Reply with quote
Steve,

A typical 3390 dasd device will have 56,664 bytes per track.1 megabyte is equal to 1,048,576 bytes or 2 to the power of 20.

Table of 3390 Device Characteristics

Code:

        Device Model:    Model 1       Model 2       Model 3       Model 9   
             Density:     Single        Double        Triple         Mod 9   
                       ------------------------------------------------------
 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   



Gig=Gigabytes, Meg=Megabytes, m=milliseconds

Hope this helps...

Cheers

Kolusu
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ofer71
Intermediate


Joined: 12 Feb 2003
Posts: 358
Topics: 4
Location: Israel
PostPosted: Wed Mar 03, 2004 5:59 pm    Post subject: Reply with quote
You can find a great utility here.

O.
________
synthetic weed
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