[Galaxy S I9000 General] Virnik0:
Yes, flashing should be no problem. But beware. Europian providers are using different frequencies band, which can show up as a problem for you.

exactly

right

No. loop device is typically file (/dev/loop) corresponding to the root partition.

I will try to explain. Imagine one single file filled by zeroes. Now understand this file, or any other file as a physical device. In Unix world (Unix and Linux are both POSIX platforms, where the same rules apply), any device has own file under /dev directory. Now get back to the zerroed file. For example, we can create this file of 1GB, and access it as a normal device file, which means, that all tools we will use, will understand this file as a device too (parted, mkfs, chkfs and more).

We will create filesystem on this device. In this case, ext2 partition (ext3 and ext4 are faster, but we do not need journaling, because Android do not use it...at least not now), and then, because we already accepted this file as a device, we will mount this file as a standart disk. In POSIX world, every disk must be mounted to specific directory, to be accessed.

For example, imagine classic computer. You have SATA disk, which corresponds to /dev/sda file. If we create three partitions on this disk, we will get another three files in /dev/ (sda1, sda2, sda3). If we do something to the file itself, we can damage our data. To access our data, we will have to mount them.

We can mount /dev/sda1 as a /boot (in which kernel and boot record lies), /dev/sda2 as a /, and /dev/sda3 as a /home

Now, when we will try to list all directories on our system, we will see all three directories, which must exist on / first.

then, under each specific directory, data from our partitions will be stored.

OCLF works the same, only difference is, that it is not using partitions, it is using loop device, which works the same.

We have file "blabla" in directory / (for example, it's path is /blabla)

This file is internally formated as a ext2 filesystem.

Then, it is mounted as a classic disk to specific directory, for this example, to /data

So, question is, where our personal data are? I mean, in user readable format.

Sure, it can be found under /data directory. User do not need to observe other files, because only thing which matters for him is his directory with his data.

To be short, OCLF makes loop device (corresponding with one big file), format it as a ext2 partition, mount it as some temporary directory, and then move system files in it. System files will be deleted in the original source, but will now exist in the temporary directory, which is our virtual loop device (disk)

Then, OCLF will unmount it. Original system directory is empty now, so it is exactly as we need it to be, because OCLF will mount our loop device to this directory.

So, conclusion of this all is, that you as a user, will still see your system data in the same directory, which will differ in nothing from the previous state, but because it is actually on the ext2 filesystem, it is much more faster.

As explained few lines before, nothing will change from point of view of user, system, or Kies. So it is absolutelly safe, and much more faster. More over, all system data will lie in one disk, so you can count that all free space left is absolutelly yours :-D

So do not worry and proceed as described in the howto. No danger awaits you :-D

And, no Chuck Norris will rise from the hells to be feared of :-D