Jelle de Jong wrote:
> Hi Jean-Pierre,
>
> When trying to read algemeen.txt I get a reproducible "Bad stream for
> offset" (I got a few more files with the same issue)

So, please post the reparse tag for this file algemeen.txt :
getfattr -h -e hex -n system.ntfs_reparse_data somepath/algemeen.txt

Also please post the contents of file 1545290. I do not
know its name, but it must be in the Stream directory,
with a suffix .ccc. To get its name do :
ls -li *as*usual*/Stream/*.ccc | grep 1545290

>
> # ntfsinfo -fvi 0 /dev/mapper/lvm1--vol-sr7--disk2--snapshot--copy2
> http://paste.debian.net/plainh/486b1a01

So inode 1582022 must be in cluster 30826611 and
inode 1545290 in cluster 30817428.
Please post the outputs of :
dd if=/dev/mapper/lvm1--vol* skip=30826611 bs=4096 count=1 | od -t x1
dd if=/dev/mapper/lvm1--vol* skip=30817428 bs=4096 count=1 | od -t x1

The sequencing error which had been detected may have
disappeared with no evidence left, but it is worth
trying.

> I feel we may be almost there (support for data deduplication), but
> still hitting a few unreadable files...

I hope so, this is an uneasy situation for me, as I
cannot reproduce the errors. Thanks for you cooperation
to the bug hunt.

Jean-Pierre

>
> Thanks you again!
>
> Kind regards,
>
> Jelle de Jong
>
>
> On 23/03/17 22:03, Jean-Pierre André wrote:
>> Hi,
>>
>> Jelle de Jong wrote:
>>> Hi Jean-Pierre,
>>>
>>> Thank you again!
>>>
>>> Could you take a look at the following output, I got some "Bad stream
>>> for offset" messages: http://paste.debian.net/plainh/c145e066
>>>
>>> Follow-up on the previous mail
>>>
>>> I was not able to get any node information, and have not been able to
>>> reproduce the NTFS messages.
>>>
>>> ntfsinfo -fvi 1582022 /dev/mapper/lvm1--vol-sr7--disk2--snapshot--copy2
>>> Error loading node: No such file or directory
>>
>> Before digging into the "Bad stream for offset" messages,
>> I would like to get details about those inconsistencies
>> before they are wiped out (hoping it is not too late).
>> Maybe the issues are related, maybe they are not.
>>
>> The ntfsinfo error means either that the faulty inodes
>> have been freed or they are extents to other inodes.
>>
>> I will have to do it in two steps : first determine where
>> they are located, then extract their contents.
>>
>> To get the mapping of inodes, please post the output of
>> ntfsinfo -fvi 0 /dev/mapper/lvm1--vol-sr7*
>>
>> Jean-Pierre
>>
>>>
>>> Kind regards,
>>>
>>> Jelle de Jong
>>>
>>> On 21/03/17 12:01, Jean-Pierre André wrote:
>>>> Hi,
>>>>
>>>> Jelle de Jong wrote:
>>>>> Dear Jean-Pierre,
>>>>>
>>>>> I am still testing the dedup plugin, I have issues with rdiff-backup
>>>>> that the checksum of the source and destination are not the same, but
>>>>> this can be an issue with rdiff-backup.
>>>>>
>>>>> However I did get these messages, but I do not know if they are
>>>>> related
>>>>> to the dedup plugin?
>>>>>
>>>>> Mar 21 06:57:37 backup ntfs-3g[12620]: Record 1582022 has wrong SeqNo
>>>>> (159 <> 156)
>>>>> Mar 21 06:57:37 backup ntfs-3g[12620]: Could not decode the type of
>>>>> inode 1582022
>>>>> Mar 21 06:57:37 backup ntfs-3g[12620]: Record 1545290 has wrong SeqNo
>>>>> (296 <> 295)
>>>>> Mar 21 06:57:37 backup ntfs-3g[12620]: Could not decode the type of
>>>>> inode 1545290
>>>>
>>>> These errors are thrown by ntfs-3g proper, not by the
>>>> deduplication plugin.
>>>>
>>>> Inconsistencies have been found in the mentioned files,
>>>> and they are unlikely to be created by the plugin (which
>>>> does not have updating support), ... but one never knows.
>>>> Owing to the inconsistencies, ntfs-3g cannot tell if the
>>>> said files are plain files, directories, sockets, etc.
>>>>
>>>> You have to run chkdsk to fix these inconsistencies, but
>>>> this can lead to losing data, so before doing that, the
>>>> parameters of these files should be analyzed to assess
>>>> the possible damage.
>>>>
>>>> Please post the outputs of :
>>>> ntfsinfo -fvi 1582022 /dev/partition
>>>> ntfsinfo -fvi 1545290 /dev/partition
>>>>
>>>> This must be done as root, replacing /dev/partition by
>>>> the actual partition path (something like /dev/sdc2)
>>>>
>>>> Jean-Pierre
>>>>
>>>>>
>>>>> Kind regards,
>>>>>
>>>>> Jelle de Jong
>>>
>>
>>
>



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