MVSFORUMS.com Forum Index MVSFORUMS.com
A Community of and for MVS Professionals
 
 FAQFAQ   SearchSearch   Quick Manuals   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Calculate Space

 
Post new topic   Reply to topic   printer-friendly view    MVSFORUMS.com Forum Index -> Data Management
View previous topic :: View next topic  
Author Message
steve777
Beginner


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
Back to top
View user's profile Send private message
kolusu
Site Admin
Site Admin


Joined: 26 Nov 2002
Posts: 12375
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
_________________
Kolusu
www.linkedin.com/in/kolusu
Back to top
View user's profile Send private message Send e-mail Visit poster's website
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
Back to top
View user's profile Send private message Send e-mail
Display posts from previous:   
Post new topic   Reply to topic   printer-friendly view    MVSFORUMS.com Forum Index -> Data Management All times are GMT - 5 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


MVSFORUMS
Powered by phpBB © 2001, 2005 phpBB Group