Re: Please help (backup) - Mailing list pgsql-admin

<font size="-1"><font face="Verdana">Really all file content after object definitions looks like "Encoded/Encrypted"
andwhen I do a restore all table data are restored successfully (except one, that is in the "corrupted sector"). So,
maybethe pg_dump do a encrypt or something like that over the DATA content.<br /><br /><br /> Thanks.<br /><br /><br
/></font></font><br/> Phillip Smith escribió: <blockquote cite="mid:024701c8147c$55cc9430$9b0014ac@wbaus090"
type="cite"><style>
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--> </style><div class="Section1"><p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:
10pt;font-family: Arial; color: navy;">(Please reply to the list so everyone can keep track of the
thread)</span></font><pclass="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt;
font-family:Arial; color: navy;"> </span></font><p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size:10pt; font-family: Arial; color: navy;">You’ll need to look at the table definitions to work out what
thedata should look like, and if it doesn’t look like that – then it’s probably part of the corrupt
data…</span></font><pclass="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt;
font-family:Arial; color: navy;"> </span></font><p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size:10pt; font-family: Arial; color: navy;"> </span></font><div style="border-style: none none none solid;
border-color:-moz-use-text-color -moz-use-text-color -moz-use-text-color blue; border-width: medium medium medium
1.5pt;padding: 0cm 0cm 0cm 4pt;"><p class="MsoNormal"><font color="black" face="Tahoma" size="2"><span lang="EN-US"
style="font-size:10pt; font-family: Tahoma; color: windowtext;">-----Original Message-----<br /><b><span
style="font-weight:bold;">From:</span></b> Anibal David Acosta [<a class="moz-txt-link-freetext"
href="mailto:aa@personal.net.py">mailto:aa@personal.net.py</a>]<br /><b><span style="font-weight:
bold;">Sent:</span></b>Monday, 22 October 2007 15:33<br /><b><span style="font-weight: bold;">To:</span></b> Phillip
Smith<br/><b><span style="font-weight: bold;">Subject:</span></b> Re: [ADMIN] Please help (backup)</span></font><p
class="MsoNormal"><fontcolor="black" face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font><p
class="MsoNormal"><fontcolor="black" face="Verdana" size="2"><span style="font-size: 10pt; font-family: Verdana;">I
openwith word pad & notepad, but table, functions and other object declarations looks like "plain text" but the
DATAnope.<br /><br /> This is the beginnig of something that looks as DB object<br />
---------------------------------------------------------------------<br/> ALTER TABLE ONLY threads<br />     ADD
CONSTRAINTthreads_fk1 FOREIGN KEY (forum_id) REFERENCES forums(id) ON DELETE RESTRICT;<br />  =   ALTER TABLE ONLY
public.threadsDROP CONSTRAINT threads_fk1;<br />        public       postgres    false <hr align="left" size="1" />  
1488<hr align="left" size="1" />   1869 <hr align="left" size="1" />   1464      <br />
---------------------------------------------------------------------</span></font><br/><font face="Verdana"
size="2"><spanstyle="font-size: 10pt; font-family: Verdana;"><br /><br /> This is the beginnig of something that looks
asDB object<br /> ---------------------------------------------------------------------</span></font><br /><font
face="Verdana"size="2"><span style="font-size: 10pt; font-family: Verdana;"> xœeYÝzÚ¸½Þ}<br />
Ï͹˜ïk¶1†»!</span></font><fontface="Verdana" size="2"><span style="font-size: 10pt; font-family:
Verdana;"></span></font><fontface="Verdana" size="2"><span style="font-size: 10pt; font-family: Verdana;">¤¤$á MÛ3gÊ'Œ
Ùbd;=É74Wç]æQæ<br/> Î’Im·?!^–-ikk­µE—†CæjgJš½‰ÜÕ…È•VÂÒÅ›Ð]_ÊBZ<br />
---------------------------------------------------------------------</span></font><br/><font face="Verdana"
size="2"><spanstyle="font-size: 10pt; font-family: Verdana;"><br /> BTW, I used the "PGAdmin" application to make the
backup,I don't have any BLOB column, just normal data type (integer, varchar, datetime)<br /><br /><br /> As you can
see,the "data" section is not human readable, so I cant  modify it.<br /><br /><br /> Thanks for your time Phillip, I
hope to find a solution.<br /><br /> regards.<br /><br /> Anibal<br /></span></font><br /> Phillip Smith escribió: <pre
wrap=""><fontcolor="black" face="Courier New" size="2"><span style="font-size: 10pt;">The dumped file is just a
plain-textfile (Depending on the data types</span></font></pre> <pre><font color="black" face="Courier New"
size="2"><spanstyle="font-size: 10pt;">within your database)</span></font></pre> <pre><font color="black" face="Courier
New"size="2"><span style="font-size: 10pt;"> </span></font></pre> <pre><font color="black" face="Courier New"
size="2"><spanstyle="font-size: 10pt;">You should be able to open the backup you made with pg_dump in
your</span></font></pre><pre><font color="black" face="Courier New" size="2"><span style="font-size: 10pt;">favourite
editorsuch as vi and search through for the dodgy data. Clear out</span></font></pre> <pre><font color="black"
face="CourierNew" size="2"><span style="font-size: 10pt;">the bad stuff, write it back to disk and you should be good
togo.</span></font></pre> <pre><font color="black" face="Courier New" size="2"><span style="font-size:
10pt;"> </span></font></pre><pre><font color="black" face="Courier New" size="2"><span style="font-size:
10pt;">Obviouslythis won't "save" the damaged portion of the data, and it may have</span></font></pre> <pre><font
color="black"face="Courier New" size="2"><span style="font-size: 10pt;">unpredictable effects when you take in to
accountany foreign keys etc you</span></font></pre> <pre><font color="black" face="Courier New" size="2"><span
style="font-size:10pt;">may have in the database that depends on this data.</span></font></pre> <pre><font
color="black"face="Courier New" size="2"><span style="font-size: 10pt;"> </span></font></pre> <pre><font color="black"
face="CourierNew" size="2"><span style="font-size: 10pt;">Cheers,</span></font></pre> <pre><font color="black"
face="CourierNew" size="2"><span style="font-size: 10pt;">~p</span></font></pre> <pre><font color="black" face="Courier
New"size="2"><span style="font-size: 10pt;"> </span></font></pre> <pre><font color="black" face="Courier New"
size="2"><spanstyle="font-size: 10pt;">  </span></font></pre><blockquote style="margin-top: 5pt; margin-bottom: 5pt;"
type="cite"><prewrap=""><font color="black" face="Courier New" size="2"><span style="font-size: 10pt;">-----Original
Message-----</span></font></pre><pre><font color="black" face="Courier New" size="2"><span style="font-size:
10pt;">From:<a href="mailto:pgsql-admin-owner@postgresql.org"
moz-do-not-send="true">pgsql-admin-owner@postgresql.org</a>[<a href="mailto:pgsql-admin"
moz-do-not-send="true">mailto:pgsql-admin</a>-</span></font></pre><pre><font color="black" face="Courier New"
size="2"><spanstyle="font-size: 10pt;"><a href="mailto:owner@postgresql.org"
moz-do-not-send="true">owner@postgresql.org</a>]On Behalf Of Anibal David Acosta</span></font></pre> <pre><font
color="black"face="Courier New" size="2"><span style="font-size: 10pt;">Sent: Monday, 22 October 2007
11:16</span></font></pre><pre><font color="black" face="Courier New" size="2"><span style="font-size: 10pt;">To: <a
href="mailto:pgsql-admin@postgresql.org"moz-do-not-send="true">pgsql-admin@postgresql.org</a></span></font></pre>
<pre><fontcolor="black" face="Courier New" size="2"><span style="font-size: 10pt;">Subject: [ADMIN] Please help
(backup)</span></font></pre><pre><font color="black" face="Courier New" size="2"><span style="font-size:
10pt;"> </span></font></pre><pre><font color="black" face="Courier New" size="2"><span style="font-size: 10pt;">I have
abackup done with "pg_dump" utility.</span></font></pre> <pre><font color="black" face="Courier New" size="2"><span
style="font-size:10pt;"> </span></font></pre> <pre><font color="black" face="Courier New" size="2"><span
style="font-size:10pt;">For some reason the backup file has 8 phisical bad sectors (17 KB of data)</span></font></pre>
<pre><fontcolor="black" face="Courier New" size="2"><span style="font-size: 10pt;"> </span></font></pre> <pre><font
color="black"face="Courier New" size="2"><span style="font-size: 10pt;">Now when I try to restore the backup all tables
arecreated successfully</span></font></pre> <pre><font color="black" face="Courier New" size="2"><span
style="font-size:10pt;">and data of almost all tables restores successfully too, but one table</span></font></pre>
<pre><fontcolor="black" face="Courier New" size="2"><span style="font-size: 10pt;">(the most important) appear
empty.</span></font></pre><pre><font color="black" face="Courier New" size="2"><span style="font-size:
10pt;"> </span></font></pre><pre><font color="black" face="Courier New" size="2"><span style="font-size: 10pt;">When I
doa pg_restore <backup_file> its show all sql instructions and</span></font></pre> <pre><font color="black"
face="CourierNew" size="2"><span style="font-size: 10pt;">data until arrive to the "damaged sector" and throws a "out
ofmemory"</span></font></pre> <pre><font color="black" face="Courier New" size="2"><span style="font-size:
10pt;">exception.</span></font></pre><pre><font color="black" face="Courier New" size="2"><span style="font-size:
10pt;"> </span></font></pre><pre><font color="black" face="Courier New" size="2"><span style="font-size: 10pt;">I want
toknow if is possible to fix the backup file removing the blocks</span></font></pre> <pre><font color="black"
face="CourierNew" size="2"><span style="font-size: 10pt;">in the "bad sectors" in order to restore all other
information.</span></font></pre><pre><font color="black" face="Courier New" size="2"><span style="font-size:
10pt;"> </span></font></pre><pre><font color="black" face="Courier New" size="2"><span style="font-size:
10pt;">somethinglike file dump surgery :)</span></font></pre> <pre><font color="black" face="Courier New"
size="2"><spanstyle="font-size: 10pt;"> </span></font></pre> <pre><font color="black" face="Courier New" size="2"><span
style="font-size:10pt;">Thanks!</span></font></pre> <pre><font color="black" face="Courier New" size="2"><span
style="font-size:10pt;"> </span></font></pre> <pre><font color="black" face="Courier New" size="2"><span
style="font-size:10pt;">Anibal</span></font></pre> <pre><font color="black" face="Courier New" size="2"><span
style="font-size:10pt;"> </span></font></pre> <pre><font color="black" face="Courier New" size="2"><span
style="font-size:10pt;"> </span></font></pre> <pre><font color="black" face="Courier New" size="2"><span
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