Re: zeroes read back more often than appended

[Pat LaVarre <p.lavarre@ieee.org>]

> > From: Pat LaVarre ...
> >
> > Try appending nonzero to multiple files in a
> > round robin sequence, and udf.ko reads back
> > zero in place of the nonzero written.  mkfs
> > in place of mkudffs reads back only the
> > nonzero written.

Furthermore, now I can confirm, as for udf.ko author Ben Fennema, so
likewise for me, the udf image unmounted after reading more zeroes than
appended ...

... does fail the udf fsck that is udfct udf_test.

Pat LaVarre

$ find `which udf_test` -printf '%l\n'
/home/pat/k/udfct_1.0r2/src/udf_tester/udf_test
$
$ fswhd 0 768 mkudffs 0xFF600 0xC8 0x2
...
$
$ udf_test dd.bin | grep -i 'final udf rev'
  Final UDF Revision range: 2.01 only
$
$  udf_test -udf 2.01 dd.bin | egrep -i '(error|warning|note):' | wc -l
     13
$
$ udf_test -udf 2.01 dd.bin | grep -i 'count:'
    Error count:   6    total occurrences:    10
  Warning count:   1    total occurrences:     1
$
$  udf_test -udf 2.01 dd.bin | egrep -i '(error|warning|note):'
        AED  1352 Error: 6 non-zero bytes found in a 696 bytes blank area
        EFE  72  Error: Logical Blocks Recorded: 102039, expected: 44269,
        AED  968 Error: 6 non-zero bytes found in a 1080 bytes blank area
        AED  936 long_ad file tail error: Extent Type: 0, expected: 1,
        AED  952 long_ad file tail error: Extent Type: 0, expected: 1,
        EFE  72  Error: Logical Blocks Recorded: 102019, expected: 46475,
  ==>   Note: 7 multiple allocated blocks inside partition space,
         Error:   7 multiple allocated blocks in extent for long ADs.
         Error:   7 multiple allocated blocks in extent for long ADs.
          Error: 2 used blocks marked as unallocated or freed
          Warning: 113305 unused blocks NOT marked as unallocated.
        LVID 80  FreeSpaceTable error: Physical Partition p0 Free Space: 188597,
-       Note: The verifier may be unable to find the correct values for
$