RE: Calculating a Kilobyte
- From: "Sina Bahram" <sbahram@xxxxxxxxx>
- To: <programmingblind@xxxxxxxxxxxxx>
- Date: Tue, 28 Oct 2008 18:51:32 -0400
Prove it
Take care,
Sina
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Octavian Rasnita
Sent: Tuesday, October 28, 2008 5:26 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: Calculating a Kilobyte
What you and Sina said is pretty wrong. I have a hard disk of 79999631360
bytes.
It doesn't begin with "8", but it was advertised as an 80 GB hard disk.
If it would be like you and Sina said, it should have some more with around
300 KB.
And if would be like you and Sina said, all the hard disks that advertise
that have 80 GB, should have exactly the same number of bytes (if they don't
have bad sectors which might not be counted), but it is not the case.
Each manufacturer makes his hard disk as good as he can, and nobody cares
about a few hundread kilobytes or actually tens of megabytes.
And this is because they are too powerful. It wouldn't be ok if they would
say that a kilobyte has 1000 bytes, because it is not true.
If it would be ok, you could found that you bought an ounce of gold which is
evaluated to 10 grams instead of more than 28, just because that was the
evaluation of the seller.
Octavian
----- Original Message -----
From: "black ares" <matematicianu2003@xxxxxxxxxxx>
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Tuesday, October 28, 2008 10:20 PM
Subject: Re: Calculating a Kilobyte
> in fact they have the calculation which sina exposed earlier.
> For example taking an 80 gb hdd
> if you multiply with 1000 you have 80000 megabytes
> also you have 80000000 kilobytes
> and in the end you have 80000000000 bytes
> Now taking the way back, but we will divide with 1024
> we will have:
> 80000000000/1024=78125000
> 78125000/1024=76293,9453125
> 76293,9453125/1024=74,50580596923828125
>
> how we see a 80 gb hdd has in fact 74.5 gb.
>
> This is marketing, but they must base their marketing on something and
> they find such ways.
> This is similar to sound systems power measuring
> some of them say the real power (rms)
> but others use a pmpo measure which is greather than the rms and if you
> are novice with sound systems, you buy a system with the greater number.
> For pmpo for example the real (rms) power is about 5% of the pmpo power
> specified.
> For example if you find a system which says that its power is 1000 pmpo
> wats you must be sure that the real (rms) power is about 50 wats.
>
>
> ----- Original Message -----
> From: "Octavian Rasnita" <orasnita@xxxxxxxxx>
> To: <programmingblind@xxxxxxxxxxxxx>
> Sent: Tuesday, October 28, 2008 8:26 AM
> Subject: Re: Calculating a Kilobyte
>
>
> A file doesn't occupy a certain multiple of sectors, but a multiple of
> clusters. A cluster can have 4kb or more (and maybe less), depending on
> the options you use when you format your hard disk.
>
> If you use a 32kb cluster as a base for formatting, the access to the hard
> disk might be a little faster, but more space will remain unoccupied,
> because if a file has only 1 kb, then 31 kb remains unoccupied, or if a
> file has 40 kb, it will occupy a cluster and 8kb from the next cluster,
> the rest of 24 kb will remain unused from the second cluster (or block, or
> whatever).
>
> But this is not important when talking about the size of the hard disks.
> No matter how you calculate, I guess no hard disk has exactly 80 GB, or
> 160GB... these are just sizes advertised by the hard disk manufacturers,
> in other way said... are only lies.
>
> It could be a mess if we could buy hard disk of 76 GB, 77 GB, 79 GB, 81
> GB... the manufacturers could promote harder such products.
>
> Octavian
>
> ----- Original Message -----
> From: "E.J. Zufelt" <everett@xxxxxxxxx>
> To: <programmingblind@xxxxxxxxxxxxx>
> Sent: Monday, October 27, 2008 11:33 PM
> Subject: Re: Calculating a Kilobyte
>
>
>> Also,
>>
>> On a harddrive there is used space, free space and wasted space. Since
>> information is stored on a disk in sectors there are times that a small
>> amount of information takes up a large amount of space.
>>
>> For instance, a file that is 123 bytes in size may take up 4096 bytes
>> because two files cannot be stored in the same sector.
>>
>> The rule is that a single file can be stored in many sectors, but two
>> files
>> cannot be stored in any one sector.
>>
>> HTH,
>> Everett
>>
>>
>> ----- Original Message -----
>> From: "Sina Bahram" <sbahram@xxxxxxxxx>
>> To: <programmingblind@xxxxxxxxxxxxx>
>> Sent: Monday, October 27, 2008 5:17 PM
>> Subject: RE: Calculating a Kilobyte
>>
>>
>>> You're being caught by the fact that harddrive manufacturers measure a
>>> megabyte as 1,000,000 bytes, and your 188 gigabytes is being given to
>>> you
>>> in
>>> terms of a gigabyte being 1,024 megabytes which are 1,024 killabytes
>>> which
>>> are 1,024 bytes.
>>>
>>> Take care,
>>> Sina
>>>
>>> -----Original Message-----
>>> From: programmingblind-bounce@xxxxxxxxxxxxx
>>> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Hayden's
>>> Harness
>>> Attachment
>>> Sent: Monday, October 27, 2008 5:01 PM
>>> To: programmingblind@xxxxxxxxxxxxx
>>> Subject: Calculating a Kilobyte
>>>
>>> I have an external USB Hard Drive. That says ihave 188GB free. The
>>> kilobytes
>>> are 202,016,489,472. Dividing this by 188GB, gives 1,074,555,795. Huh? I
>>> thought 1MB was 1,024,576.
>>>
>>> Angus MacKinnon
>>> Infoforce Services
>>> http://www.infoforce-services.com
>>>
>>> "Faith is the strength by which a shattered world shall emerge into
>>> the light." - Helen Keller
>>>
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