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Formatted BD-RE capacity only 22.5G


meimeiriver
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Yesterday, I tried to do a 'quick erase' with ImgBurn 2.4.2.0. It wouldn't take, as ImgBurn kept saying the disc (BD-RE) wasn't empty. This seems to be a known issue. So, I reformatted it (which takes quite a while, of course); but now my BD-RE is only 22,5G in capacity!! WTF? Where did the rest of the 25G go to? I need it back, as I don't have 2+ gig to spare for the project.

 

I hope someone can clue me in on this. I have an LG-H20L blu-disc writer, btw. And it's a brand new rewriteable; and no errors were reported.

Edited by meimeiriver
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As with everything 'optical disc' related, the 25GB value is the unformatted value and is using 1000 as the divider, not the true 1024.

 

The real size would be:

 

Maximum Format Capacity:

Sectors: 12,219,392

Size: 25,025,314,816 bytes

Time: 2715:27:17 (MM:SS:FF)

 

25,025,314,816 bytes = 24,438,784 KB = 23,866 MB = 23.31 GB

 

That's the *best case* senario.

 

If the disc is formatted with what's known as 'spare areas' for error correction etc (part of the blu-ray standard), that size will be smaller still.

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As with everything 'optical disc' related, the 25GB value is the unformatted value and is using 1000 as the divider, not the true 1024.

 

The real size would be:

 

Maximum Format Capacity:

Sectors: 12,219,392

Size: 25,025,314,816 bytes

Time: 2715:27:17 (MM:SS:FF)

 

25,025,314,816 bytes = 24,438,784 KB = 23,866 MB = 23.31 GB

 

That's the *best case* senario.

 

If the disc is formatted with what's known as 'spare areas' for error correction etc (part of the blu-ray standard), that size will be smaller still.

Thanks for your answer. Seems I got:

 

Current Format Capacity:

Sectors: 11.826.176

Size: 24,220,008,448

Time: 2628:04:26 (MM:SS:FF)

 

Looks like there's still a whole 1G missing. And I know about the 'spare area'. I just thought it was only ~26MB in size? I forgot about the 1024 != 1000 thingy, so that at least accounts for something.

 

EDIT: The BD-RE that came with the player is the one I'm talking about. Could just be that this is an el-cheapo model. :)

Edited by meimeiriver
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Go into the settings and turn on 'Prefer Format Without Spare Areas', then ImgBurn will attempt to format using the 'Maximum Format Capacity' rather than the 'Preferred Format Capacity'.

Thanks, again!

 

BTW, I didn't realize you're the author of ImgBurn! Great program! :) It has made writing BD images a breeze!

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  • 6 months later...

Morning!

 

I'm reading this AFTER I formatted an RE & it ended up about .75 GB short of an R.

 

What's the procedure to reformat it to full capacity?

 

I unchecked the setting described above, but a "reformat" button isn't jumping out at me!

 

Thanks!

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