Re: Calculating a Kilobyte

  • From: "Octavian Rasnita" <orasnita@xxxxxxxxx>
  • To: <programmingblind@xxxxxxxxxxxxx>
  • Date: Tue, 28 Oct 2008 23:28:55 +0200

I didn't make the calculation, but if it was good, then the defragmentation doesn't change anything.
The defragmentation would change things only if more than one cluster of a file is occupied only partially. In that case, the content from other clusters will be moved to fill all the clusters of the file entirely, and leave eventually only one cluster partially occupied. 

Octavian
----- Original Message ----- From: "E.J. Zufelt" <everett@xxxxxxxxx> 
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Tuesday, October 28, 2008 11:19 PM
Subject: Re: Calculating a Kilobyte



Question:
How does defragging change the fact that the last block only consists of 1 byte? 

Everett
----- Original Message ----- From: "Sina Bahram" <sbahram@xxxxxxxxx> 
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Tuesday, October 28, 2008 4:13 PM
Subject: RE: Calculating a Kilobyte



That is, until one defrags.

Take care,
Sina

-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of black ares
Sent: Tuesday, October 28, 2008 4:11 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: Calculating a Kilobyte

you are right, but as anyone said,
a block has a fixed size and a file can niot fill all of its bloks
if you have the block size 4096 bytes
and you have a file of 12289 bytes you will have 4 bloks
but only a byte from the 4th block will be used, the rest of 4095 will be
free, but no other file can use them because this is a block of the
specified file.
so infact the file will have on the hdd 16384 bytes.
----- Original Message ----- From: "tribble" <lauraeaves@xxxxxxxxx> 
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Tuesday, October 28, 2008 1:08 AM
Subject: Re: Calculating a Kilobyte
Don't you mean data is stored in blocks of a fixed size? Or is there a new 
paradigm since my active time on this stuff? A block was a multiple of a
kilobyte.  A file was so many blocks. The blocks didn't need to be
contiguous. The mapping to blocks was completely transparent to the end
user.
Sina -- you're still in academia studying the current state of data
storage.
I have not runto anything referring to blocks on windows, so maybe it was 
just a unix-ism.
Anyone have an idea what the truth is? Just curious.
TIA
--le
----- Original Message ----- From: "E.J. Zufelt" <everett@xxxxxxxxx> 
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Monday, October 27, 2008 4:33 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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