Quick erase VS. Full erase !

[CoffeeGuy]

Does it make a difference when erasing rewritable disc's ?

[ViRaL1]

I'd assume it's like quick formatting a floppy vs a full format. If you're worried about security full format is probably better. Quick format works fine though. There have been times when I've used the same +RW disc over and over testing my backups; then I just copy the +RW to a +R or -R with Nero. It's never given me any problems.

[jackal70058]

Yes it does.
In the text that comes with the CD Writer Softwar,
It says that a Quick Erase only erases "table of contents" this means the files are still there, but you can't see them and they still take up space. The disc looks blank on computer but it actually isnt.
A full erase erases everything but takes longer (obviously) and puts back all of the disc space.
I guess if all you ever do is quick erase the disk will fill up but it will be empty?

At least goes for CD-RWs here.

[ViRaL1]

A quick format doesn't erase the files themselves, but erasing the 'table of contents' allows them to be overwritten. So in the end you're not running out of space. You still have the same amount of space available for writing whichever format option you choose.

[jackal70058]

Oh.
I didn't know that. The warning box says something but I'm not going to wait 25 minutes for erase any more!

[ViRaL1]

No, it's not worth it.

[tompika]

I hardly ever full erase my DVD+RW's, I just overwrite them.
Thats what they are designed for.

Why is it Off Topic?

[gmatov]

I don't know the answer either.

IF you quick erase, you just deleted the "index". The pages are still there. The "print", ie.

And, since digital data is 1s and 0s, if there was a space that had a 1 burnt to it, and it should be a 0, how in the hell can it be changed, assuming that the reflective quality should be one way or the other, either reflective or refractive. And, vice versa, of course.

Do they burn ONLY 1s, and where it looks for a 1 is unburnt, so it assumes a 0?

Same thing, if you did a test, as you can with a HDD, write all 1s, write all 0s, and the DVD-RW was now filled up with all 1s or all 0s, how the hell could you burn an RW? 0s I can see, but you would have to restore the RW to unwritten state, ie, all 0s.

Logic says you should have to erase to a "null" state, and what is that?

Cheers,

George

[lordsmurf]

I do full ONLY when quick doesn't work.

[sync]

George, Think of a disc as a book where you can only read the book by going through the table of contents. If you remove an entry from the table it doesn't matter if the disc still has data belonging it, because you can no longer access it.

When you add a new entry, it can then overwrite data that belonged to a deleted entry because it knows that space does not belong to an existing entry in the table.

[gmatov]

Sync,

You miss my point.

If the data you are writing now has a 1 already at the spot on the disk where there is going to be "written" an 0, isn't there going to be an error there?

If you tear out the index from a book, the print is still there. Tear a page out and print over it again with new text, and few letters are going to be matched.

Hey, I don't really care, it obviously works well enough. Just think for valuable data, full erase would be better.

Cheers,

George

[HyperYagami]

If the data you are writing now has a 1 already at the spot on the disk where there is going to be "written" an 0, isn't there going to be an error there?

study how cdrw (which is what dvd-rw is based on) work:

http://www.pctechguide.com/09cdr-rw_CD-RW.htm

[lenti_75]

=TIME

[overloaded_ide]

So, if you do a quick format, the data is not referanced and apears to be gone, but it is still there. I am geussing then using some un-delete tools you could restore those deleted files, same as a hard drive.

Now, if that erased data still exists what happens durring a full disk copy or ISO copy?? Say you have a full disk of small porn files and you erase that with a quick format. You copy a couple small files to that disk then make an iso image of the disk, burn the ISO to 4 disks and give them out to people.

Will those original porn files be on those 4 new disks, but in a deleted not refferneced state, can un-delete type tools bring those file back on these new disks where they were never at in the first place?

I think the answer would be no, but that could get interesting and create some real security problems if the deleted files could be recovered from disk copies that way.

[MOVIEGEEK]

Will those original porn files be on those 4 new disks, but in a deleted not refferneced state, can un-delete type tools bring those file back on these new disks where they were never at in the first place?

Who told you?..I deny everything!

Seriously,I have tried to extract files from a quick erase disc with ISOBuster with no luck.The data is there but isn't accessable.