All files size-increased!?

F_style · March 3, 2012, 4:08am

I was downloading Scilab 64-bit from the website, a file which is 138 Mb size (checked it on Windows). But when I was about to open it, I noted it reads 148 Mb! Even I tried copying it to my FAT-formatted USB, where it read the same 148 Mb, but when reading my USB on Windows it read the original size, 138 Mb!

Tried other downloaded files, the same results, in fact, I think it’s happening with all my saved data. What’s going on?

Using openSUSE 12.1 x86_64 with GNOME.

robin_listas · March 3, 2012, 4:28am

On 2012-03-03 04:16, F style wrote:
>
> I was downloading Scilab 64-bit from the website, a file which is 138 Mb
> size (checked it on Windows). But when I was about to open it, I noted
> it reads 148 Mb! Even I tried copying it to my FAT-formatted USB, where
> it read the same 148 Mb, but when reading my USB on Windows it read the
> original size, 138 Mb!

Verify the size in bytes, not megs.

–
Cheers / Saludos,

Carlos E. R.
(from 11.4 x86_64 “Celadon” at Telcontar)

hcvv · March 3, 2012, 9:31am

You are sre that it iis always in MB and not MiB in some cases?

robin_listas · March 4, 2012, 2:58pm

On 2012-03-03 09:36, hcvv wrote:
>
> You are sre that it iis always in MB and not MiB in some cases?

I thought of that, and made the calculations, but they don’t fit, several
megs difference.

–
Cheers / Saludos,

Carlos E. R.
(from 11.4 x86_64 “Celadon” at Telcontar)

hcvv · March 4, 2012, 3:40pm

I guess the OP should have done this. And what did he do with your suggestion?

BTW could the file have unused blcks? We have no information whatsoever. Only a story. No factual (computer) information.

robin_listas · March 4, 2012, 4:13pm

On 2012-03-04 15:46, hcvv wrote:
> I guess the OP should have done this. And what did he do with your
> suggestion?

Nothing, AFAIK.

> BTW could the file have unused blcks? We have no information
> whatsoever. Only a story. No factual (computer) information.

Right.

–
Cheers / Saludos,

Carlos E. R.
(from 11.4 x86_64 “Celadon” at Telcontar)

F_style · March 4, 2012, 10:14pm

OK, what info do you need? I’m sure of what I saw (at least) in the first post…
And this time I want to believe I don’t have file system corrupted just as happened before…

hcvv · March 4, 2012, 10:47pm

Post #2 asked for the file size, thus:

ls -l <the-file>

And show why you think it is different on the website.

And by-the-way, many people here will not be impresed by what Windows says.

F_style · March 4, 2012, 11:20pm

Here the Scilab download website. It says the Linux 64-bit version is 138 Mb (and so says on Windows).
On openSUSE (Nautilus) it says 144 Mb (not 148, sorry). By using ls -l, I got the size: 144797816. Guess it’s reading the same size of openSUSE rather than its “real” size…

Also tried with a mp4 movie I have. Source website said it was 300.11 Mb. On openSUSE it reads 314 Mb and ls -l reads 314693000. Seemingly openSUSE’s increase rate is not constant…

hcvv · March 4, 2012, 11:43pm

As M (Mega) means 10⁶, 144797816 byte means indeed 144 Mbyte (rounded off).

The other indications are false. They are using M in the meaning of 1024*1024. Read Mebibyte - Wikipedia, the free encyclopedia.

And next time yo better copy/paste the output of a command here between CODE ags instead of telling a story about what the computer says: easier for you and better to understand for us: http://forums.opensuse.org/english/information-new-users/advanced-how-faq-read-only/451526-posting-code-tags-guide.html

martin_helm · March 4, 2012, 11:41pm

Am 04.03.2012 23:26, schrieb F style:
>
> On openSUSE (Nautilus) it says 144 Mb (not 148, sorry). By using ls -l,
> I got the size: 144797816. Guess it’s reading the same size of openSUSE
> rather than its “real” size…
>
144797816/1024/1024 = 138.089
so whatever nautilus says it seems to be in powers of 1000 instead of 1024

martin_helm · March 4, 2012, 11:46pm

Am 04.03.2012 23:26, schrieb F style:
>
> ‘Here’ (http://www.scilab.org/products/scilab/download) the Scilab
> download website. It says the Linux 64-bit version is 138 Mb (and so
> says on Windows).
> On openSUSE (Nautilus) it says 144 Mb (not 148, sorry). By using ls -l,
> I got the size: 144797816. Guess it’s reading the same size of openSUSE
> rather than its “real” size…
>
> Also tried with a mp4 movie I have. Source website said it was 300.11
> Mb. On openSUSE it reads 314 Mb and ls -l reads 314693000. Seemingly
> openSUSE’s increase rate is not constant…
>
>
I have a scilab 5.3.3 bin file from Nov 19, 2011 which also shows
144797816 bytes and dolphin tells me 138.1 MB, so your nautilus is set
to 1 MB = 1000000 Bytes instead of 1MB = 1048576 Bytes

F_style · March 5, 2012, 12:15am

Wow, so it was all a matter of mistaking Mb with Mib on Nautilus. I already knew what the difference is strictly speaking, and also that at least where I live we say “Mb” referring to “Mib” (a common misunderstanding, perhaps similar to saying “I’m not doing anything” instead of “I’m doing anything”). Which makes me really wonder: when we say “Mb”, which one should we strictly refer in all computational science and stuff, Mb = 10⁶ or Mib = 1024²?

So Nautilus is probably set to Mb in its strict definition. I’ll keep in mind your advise, mr. Hcvv. Thank you all very much.

robin_listas · March 5, 2012, 12:13am

On 2012-03-04 23:26, F style wrote:
>
> ‘Here’ (http://www.scilab.org/products/scilab/download) the Scilab
> download website. It says the Linux 64-bit version is 138 Mb (and so
> says on Windows).
> On openSUSE (Nautilus) it says 144 Mb (not 148, sorry). By using ls -l,
> I got the size: 144797816. Guess it’s reading the same size of openSUSE
> rather than its “real” size…

Ok, now we have some real data. I asked you for the size in bytes.
144797816 bytes is indeed 144 MB and is indeed 138 MiB. It is not 138 MB,
that figure is wrong; those sites or software that say “138 MB” are plain
wrong and using the wrong units of measure according to the current
professional standards.

It is no surprise that Windows do not follow standards. Not new.

–
Cheers / Saludos,

Carlos E. R.
(from 11.4 x86_64 “Celadon” at Telcontar)

martin_helm · March 5, 2012, 12:22am

Am 05.03.2012 00:13, schrieb Carlos E. R.:
> It is no surprise that Windows do not follow standards. Not new.
>
And linux does also not, ls -lh shows 139M, dolphin shows 138.1 MB (not
MiB) and other software does just to its (or the developers) liking.