[mdlug] Mystery file system

[Aaron Kulkis]

R KANNAN wrote:
> Looks like the header infromation is missing. 'od -c' yields
> 
> 000000  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
> *
> 0100000  \0   B   E   A   0   1 001  \0  \0  \0  \0  \0  \0  \0  \0  \0
> 0100020  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
> *
> 0104000  \0   N   S   R   0   3 001  \0  \0  \0  \0  \0  \0  \0  \0  \0
> 0104020  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
> *
> 0110000  \0   T   E   A   0   1 001  \0  \0  \0  \0  \0  \0  \0  \0  \0
> 0110020  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
> 

maybe it's a raw file burned to the disk w/o any filesystem
(as IF it were a .iso, without being an ISO9660 filesystem).




> On Thu, Apr 7, 2011 at 10:38 PM, Aaron Kulkis <akulkis00 at gmail.com> wrote:
>> R KANNAN wrote:
>>> I got  data CD from someone and I am unable to mount the file system
>>> on Linux but I can read it fine on Windows XP. The file system on
>>> Windows says UDF and had about 700MB of data on it. While mounting on
>>> Linux it just says
>>>
>> $ su
>> password:
>> # od -c /dev/dvdrecorder | less
>>
>>
>> You should see the filesystem type spelled out in the first few characters.
>>
>> For example, here are the first few bytes of an XFS filesystem:
>> root at kulkilap:/home/akulkis>  od -c /dev/sda6 | less
>> 0000000   X   F   S   B  \0  \0 020  \0  \0  \0  \0  \0 001   O   7  \0
>> 0000020  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
>>
>>
>>
>>> mount: wrong fs type, bad option, bad superblock on /dev/dvdrecorder,
>>>        missing codepage or other error
>>>        In some cases useful info is found in syslog - try
>>>        dmesg | tail  or so
>>>
>>> dmesg|tail shows
>>> UDF-fs: No partition found (1)
>>> Unable to identify CD-ROM format.
>>> end_request: I/O error, dev sr0, sector 336000
>>> Buffer I/O error on device sr0, logical block 42000
>>> end_request: I/O error, dev sr0, sector 336000
>>> Buffer I/O error on device sr0, logical block 42000
>>> end_request: I/O error, dev sr0, sector 336000
>>> Buffer I/O error on device sr0, logical block 42000
>>> end_request: I/O error, dev sr0, sector 336000
>>> Buffer I/O error on device sr0, logical block 42000
>>> end_request: I/O error, dev sr0, sector 336000
>>> Buffer I/O error on device sr0, logical block 42000
>>> end_request: I/O error, dev sr0, sector 336000
>>> Buffer I/O error on device sr0, logical block 42000
>>> end_request: I/O error, dev sr0, sector 335944
>>> Buffer I/O error on device sr0, logical block 41993
>>> end_request: I/O error, dev sr0, sector 335944
>>> Buffer I/O error on device sr0, logical block 41993
>>> UDF-fs: No partition found (1)
>>>
>>> Any ideas?
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