Author Topic: Can I partition a hard drive to it's full capacity?  (Read 2996 times)

[SJ]DenDanger

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Can I partition a hard drive to it's full capacity?
« on: February 23, 2009, 09:58:47 pm »
 Okay, so I'm formatting my second hard drive. It's supposedly 1.5 TB but shows up as 1397.26 GB.

 I understand hard drives "reserve" the space for the O.S., etc but this is just fopr storage. So, my question is,

IS it just over rated? Or can I say type in manually the full 1500GB (Or 150000 mb or however it's written..) and get the full 1.5 TB? Or is this a bad idea to attempt?

[SJ]Madmax

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Re: Can I partition a hard drive to it's full capacity?
« Reply #1 on: February 23, 2009, 10:05:55 pm »
Hi Den give Rivet a pm he should be able to tell you about that sort of thing that's wot dose m8



Alan

[SJ]DenDanger

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Re: Can I partition a hard drive to it's full capacity?
« Reply #2 on: February 23, 2009, 10:07:07 pm »
 Thanks Alan.

 

[SJ]JuneBug

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Re: Can I partition a hard drive to it's full capacity?
« Reply #3 on: February 23, 2009, 11:16:19 pm »
When looking at this and doing the gawd awful math I think... ...don't quote me Den... ...1397.26 is the max size available for your drive. I believe the portion `missing`is reserved for the file allocation table or something like that. The bigger the drive I beleive the bigger the table.

Rivet should know 100% though :)

[SJ]DenDanger

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Re: Can I partition a hard drive to it's full capacity?
« Reply #4 on: February 23, 2009, 11:32:56 pm »
When looking at this and doing the gawd awful math I think... ...don't quote me Den... ...1397.26 is the max size available for your drive. I believe the portion `missing`is reserved for the file allocation table or something like that. The bigger the drive I beleive the bigger the table.

Rivet should know 100% though :)


Yeah, that sounds right. Couldn't hurt to ask (try) though. lol

 MAN, this thing's taking a loooong time to format. hahahaaaa..

[SJ]Rivet

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Re: Can I partition a hard drive to it's full capacity?
« Reply #5 on: February 24, 2009, 11:29:27 am »
Wow! here's one to chew over  :?:. Thanks for volunteering me guys -

Alan, as you were first to volunteer me, don't worry, I'll get you back for this  lol.

Ok Den, firstly you will never get the capacity that is stated on a hard drive once it is formatted and even in the raw (unformatted) state it will not match the size stated on the drive itself.

In addition to that, even if you know the actual true raw size of the drive (not the one stated on the label), it will not match the formatted size, although this difference is quite small and is taken up by the file system of the operating system and of course the operating system itself. So Junebug is right, but there's more. The big difference comes about because of the differences of two mathematical systems.

I think we are all familiar with Metric. This is the system in every day use around the world and is a system based on the mathematical power of 10. This gives us numbers in this sequence:

1-10-100-1000-10000-100000-1000000.

Fine. All nice and easy. :yes:

Computers on the other hand, count using binary. This is a mathematical system based on the power of 2. This system gives us a numerical sequence of:

1-2-4-8-16-32-64-128-256-512-1024-2048-4096 etc.

So, our every day metric system goes like this:

kilo = 1,000
mega = 1,000,000
giga = 1,000,000,000
 
With binary used for computer data storage it goes like this:

Kilobyte = 1024
Megabyte = 1,048,576
Gigabyte = 1,073,741,824
Terabyte = 1,099,511,627,776 (1024x1024x1024x1024)

That's what makes up the big difference. When the computer calculates the hard drive capacity (using binary) it takes 1,073,741,824 bytes (actual gigabyte) for every 1,000,000,000 bytes (Decimal or manufacturer's gigabyte) which is why the overall capacity will seem less than that stated by the manufacturer.

To confuse matters even further, computers also use decimal counting (CPU clock speed for example)

Then there is the manufacturing, sales and marketing side of things. It is far easier to term Hard Drive sizes in decimal rather than binary so it was decided that a gigabyte would be 1000,000,000 bytes etc. It also made the disks look bigger (theyre not in actual fact. They are the same size but just specified differently).

All in all, 1397.26 sounds about right for your drive. The bigger the drive capacity, the bigger the difference. Without doing the maths I think it's somewhere around 7 or 8% of what is stated on the label (decimal). That's why, when you install and format your drive, it shows up as less than you thought you bought.

Phew, I think that's about it. If I try to go any further with this I'll need therapy. Someone else can do the maths if they want to - over to you Junebug :D (well you didn't think you'd get away with volunteering me did you?)  :rotfl:

Hope that helps.  :hats off:
« Last Edit: February 24, 2009, 09:15:18 pm by [SJ]Rivet »

[SJ]Sh1te R1der

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Re: Can I partition a hard drive to it's full capacity?
« Reply #6 on: February 24, 2009, 12:18:24 pm »
Sorry Riv, I got a little lost... so, once again, who had rice?  :?:

[SJ]Byron

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Re: Can I partition a hard drive to it's full capacity?
« Reply #7 on: February 24, 2009, 12:35:39 pm »
Well, I don't think I should pay for my sweet and sour sauce, cos Pete spilled most of that down Dunki's trousers.

[SJ]Rivet

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Re: Can I partition a hard drive to it's full capacity?
« Reply #8 on: February 24, 2009, 12:41:08 pm »
Sorry Riv, I got a little lost... so, once again, who had rice?  :?:


Is that white rice or brown rice? It makes a difference you know ;)


To go back to the original subject, here are the numbers:

Den's drive is specified as a 1.5 Tb drive. It's specified in decimal, or the base 10 formula by the manufacturers.

1.5 terabytes using the computer's Binary formula = 1,610,612,736,000 bytes. 

1.5 terabytes using the metric base 10 formula    = 1,500,000,000,000 bytes.

This is a difference of 110612736000 bytes, or 103.01614 gigabytes.


So when you take this difference into account, instead of showing up as a 1.5 Tb drive when installed in your machine, it will show up as 1396.98386 Gb, not the expected 1,500 which is basically what Den's original post states.

There are also other factors that can affect the displayed hard drive capacity but this is the main one.

And that'll do for me. Now I'm off for a sweet an' sour chicken with boiled rice thank you very much.  :hats off:

Junebug - you're off the hook  lol

Alan - try not to do that to me again  :extend:

Next time the answer might just be "It's right, don't worry about it." or "you don't need to know that, just accept it"  :rotfl:
« Last Edit: February 24, 2009, 12:59:53 pm by [SJ]Rivet »

[SJ]Pierre61

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Re: Can I partition a hard drive to it's full capacity?
« Reply #9 on: February 24, 2009, 01:13:01 pm »
So.... Tim did have the rice .. or not? ... confused...  moo

[SJ]Madmax

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Re: Can I partition a hard drive to it's full capacity?
« Reply #10 on: February 24, 2009, 01:30:07 pm »
Sorry m8 just trying too help someone along the right track across the pond  :(




Alan :cry:

[SJ]Byron

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Re: Can I partition a hard drive to it's full capacity?
« Reply #11 on: February 24, 2009, 01:34:23 pm »
Shuddup and eat your poppadoms!

[SJ]Rivet

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Re: Can I partition a hard drive to it's full capacity?
« Reply #12 on: February 24, 2009, 01:47:37 pm »
So.... Tim did have the rice .. or not? ... confused...  moo


Yes Pete, I believe I stated it was boiled rice.   :)

Sorry m8 just trying too help someone along the right track across the pond  :(

Alan :cry:


There there Alan, here's a hanky. It was only in jest a I'm sure you know. Glad to help if I can. lol

Shuddup and eat your poppadoms!


A Chinese meal with poppadoms? I have standards you know :tut:. Prawn crackers purleeeeeze  :sulk:

Oh and the sweet and sour had nothing to do with Dunki or his trousers in any way whatsoever. Er, no offence to Dunki or his trousers  :rotfl:




[SJ]DenDanger

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Re: Can I partition a hard drive to it's full capacity?
« Reply #13 on: February 24, 2009, 02:29:22 pm »
 Thanks Riv.

 It all makes sense now. Marketting. lol

 We had buttered chicken a while bacl.

 I'm not big on rice though...

[SJ]JuneBug

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Re: Can I partition a hard drive to it's full capacity?
« Reply #14 on: February 24, 2009, 04:09:48 pm »
Junebug - you're off the hook  lol


 ;)  :D

[SJ]CasparGTL

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Re: Can I partition a hard drive to it's full capacity?
« Reply #15 on: February 24, 2009, 05:26:39 pm »
Well done Riv, hats off.  :hats off:
Thought you had him cornered eh Alan? Nope. lol

[SJ]Rivet

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Re: Can I partition a hard drive to it's full capacity?
« Reply #16 on: February 24, 2009, 09:09:14 pm »
Thanks Riv.


You're welcome  :)

It all makes sense now. Marketting. lol


Yeah, those marketing boys are always looking for ways of saying we're getting more than we actually do. It was ever thus. In fact while we're at it, I wouldn't mind interest free credit and nothing to pay for a year on my new rig I recently built. They never offer that on computer gear though do they? lol

Well done Riv, hats off.  :hats off:


Thanks Cas :)




[SJ]DRokK

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Re: Can I partition a hard drive to it's full capacity?
« Reply #17 on: February 24, 2009, 11:39:19 pm »
nicely put Riv,
i must say im a bit disappointed though, that you didn't explain the reasons for the use of hexadecimal programming language in the same paragraph as your binary spiel.
 you also missed that i had the aromatic crispy duck  :innocent:

[SJ]DenDanger

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Re: Can I partition a hard drive to it's full capacity?
« Reply #18 on: February 25, 2009, 12:42:46 am »
Aromatic, because ya left it outside a week before cooking it..

[SJ]Rivet

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Re: Can I partition a hard drive to it's full capacity?
« Reply #19 on: February 25, 2009, 11:25:29 am »
Drokky had
AROMATIC CRISPY DUCK!!!


And I'm not explaining hexadecimal. Today, I'm resting.  ;)

[SJ]DenDanger

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Re: Can I partition a hard drive to it's full capacity?
« Reply #20 on: February 25, 2009, 03:08:05 pm »
Oh, and Happy Birfday Riv!!