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Re: "Calculated and written ECMA-119 tree end differ" under very specifi


From: Thomas Schmitt
Subject: Re: "Calculated and written ECMA-119 tree end differ" under very specific circumstances
Date: Sun, 31 Jan 2021 10:37:53 +0100

Hi,

more thoughts:

If you can make a smaller ISO which shows the problem, then please
show me again the program messages which get emitted when making that ISO.

If it is not possible or too inconvenient to create a smaller ISO,
then for now only send the first 74 * 2048 = 151552 bytes of the big ISO.
E.g.:
  dd if=foo3.iso bs=2048 count=74 of=file_to_send_to_me

(Fewer files would still be desirable. But it might be that a certain
number of file names and metadata is needed to trigger the problem.)

----------------------------------------------------------------------

The message

  libisofs: WARNING : Calculated and written ECMA-119 tree end differ: 72 <> 73

means that when the volume descriptors and the directory data were completed,
73 blocks had been written whereas the calculated number was 72.
I.e. some directory record or the directory's Continuation Area came
out larger than expected.

So this deviation is supposed to be in the first 73 blocks of the resulting
ISO filesystem. (I add another block to my wish size, just in case i'm
miscalculating by one.)


Have a nice day :)

Thomas




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