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Partitioning and defrag question


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#1 pasha19

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Posted 28 February 2018 - 11:03 AM

If one wished to setup their drive with three partitions one to contain the OS and Apps, one to contain swap and temp files and a third containing data in that order on a disk.  Is there a means of defraging the first OS and Apps partition toward the end of the partition instead of the beginning to minimize arm motion?  There should not be much in the second partition ahd it would be relatively small and the third partition data optimizes most effectively in the traditional manner to the beginning of the partition.  This just may be a stupid idea too.



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#2 Allan

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Posted 28 February 2018 - 11:06 AM

At the risk of offending (and I truly don't want to do that), I want to agree with your final sentence :wink: .

 

There is zero need to do what you're asking.


Edited by Allan, 28 February 2018 - 11:06 AM.


#3 mikey11

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Posted 28 February 2018 - 11:06 AM

i think you are overthinking this



#4 pasha19

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Posted 28 February 2018 - 11:13 AM

Reasonable responses from both that is why I included that last sentence.  I guess I will chalk this one up as a bad idea.

 

I'm a really old timer when disks were considerably slower and we thought more about things like the delay attributable to arm motion.  However then optimization generally was more effective when simultaneously used items were on different physical drives and possibly controllers too in the mainframe world.


Edited by pasha19, 28 February 2018 - 11:21 AM.


#5 RolandJS

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Posted 28 February 2018 - 01:35 PM

Pasha, I'm 66, I remember those old HD days fondly  :)


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#6 pasha19

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Posted 28 February 2018 - 02:31 PM

I guess that makes me the baby I'm 65.  I never saw one but I heard about the ramac disks on the IBM 1401  One head multiple platters -- the head had to fully retract to switch platters.

 

On the 370's we could calculate both seek time to get the head to the cyllinder and the average rotational delay for the data to pass under the head.  Then there was calculating block sizes which required an adjustment for keyed records (indexed) versus unkeyed records serial and relative record files.


Edited by pasha19, 28 February 2018 - 02:59 PM.


#7 RolandJS

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Posted 01 March 2018 - 12:03 PM

My first HDD purchase was a 240MB (not GB!) for $210+- -- way back when...

And, yes, every trick in the book was used to maximize efficiency and minimize HD usage, especially HDD "thrashing".


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#8 pasha19

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Posted 02 March 2018 - 01:19 PM

I think my first drive was 10MB or 20MB attached to the external floppy port on a 9" Mac (the one with a single internal 3/12" floppy.


Edited by pasha19, 02 March 2018 - 02:16 PM.





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