Re: Recovery damaged dump file

On 03/09/2017 09:09 PM, Adrian Klaver wrote:
> On 03/09/2017 03:55 AM, mac pack wrote:
>> Hi.
>>
>> My PostgreSQL server was affect by a Ransomware virus. I'm trying to
>> restore the database from a dump file made by pg_dump in custom format
>> (-F c option), but the dump file seems to be damaged in the first's 1000
>> lines.
>>
>> Opening the file with vi shows ^(at)^@^(at)^@^(at)^@^(at)^@^(at)^@^ followed by part of
>> the databse schema and the a lote of lines with binary characters that i
>> think is the table's data.
>
> The custom format is a binary format so non text characters would be
> expected.
>
> Did you try to restore using the file, before doing the below?
>
> If there was an error when you did that and if so what was it?

Should be:

Was there an error when you did that and if so what was it?

>
>>
>> I tried to replace those first lines with lines from other dev database
>> and i can run pg_restore but at some point throws error.
>>
>> pg_restore db.backup > out.sql
>>
>> pg_restore: [custom archiver] unrecognized data block type (0) while
>> searching archive
>>
>> The follow commands works fine:
>> pg_restore -s db.backup > out.sql
>> pg_restore -l db.backup
>>
>> Do you think it's possible to recover the dump file, is there any method
>> or tool to recover dump files?
>>
>>
>> Thanks.
>> Mário
>
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com