Medium Format Corrupted error

[dbminter]

Have never seen this before while trying to burn a BD-R:

I 18:58:48 Writing LeadIn...
W 18:59:20 Failed to Write Sectors 1056 - 1087 - Reason: Write Error
W 18:59:20 Retrying (1 of 20)...
W 18:59:20 Retry Failed - Reason: Medium Format Corrupted
E 19:08:39 Failed to Write Sectors 1056 - 1087 - Reason: Write Error
I 19:08:39 Synchronising Cache...
W 19:08:43 User opted to skip the 'Close Track/Session/Disc' functions.
E 19:08:43 Failed to Write Image!

 

I tried using the same disc again and it successfully burned.  It's Verifying right now.  I'll check out the contents after it succeeds (IF it does.) but it's really weird.

 

So, what could have caused this and why did it eventually write a 2nd time to the same medium? 

 

Thanks!

[LIGHTNING UK!]

It looks like it had trouble writing to the disc - the drive reported a Write error.

Maybe it did a better job with power calibration the 2nd time around and so managed to burn it ok.

You were lucky the first attempt didn’t render it useless

[dbminter]

I echo your last statement.  I was completely surprised the 2nd attempt to write to it actually worked.

 

[dbminter]

Funny, the exact same thing happened again on the first disc from a different stack of BD-R's!    Medium corrupt error but a 2nd attempt to burn it starts.  Weird.    So, it must be something going wrong with this Pioneer crap.

 

It seems the reason the 2nd attempt works is because no actual data was written before the failure.  It says 0 KB written when I cancel the operation.