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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Diego Fernández Slezak <dfslezak@gmail.com>
Cc: pgsql-admin <pgsql-admin@postgresql.org>
Subject: Re: ERROR: could not read block
Date: Sat, 21 May 2011 11:16:09 -0400
Message-ID: <1278.1305990969@sss.pgh.pa.us> (raw)
In-Reply-To: <BANLkTinMSGGm+6+tgKVZMHXJbO3ZoE_9LQ@mail.gmail.com>
References: <BANLkTinK8-Gz01ARiAryB0Hx+oJac=D=HA@mail.gmail.com>
	<BANLkTinMSGGm+6+tgKVZMHXJbO3ZoE_9LQ@mail.gmail.com>

=?ISO-8859-1?Q?Diego_Fern=E1ndez_Slezak?= <dfslezak@gmail.com> writes:
> Hello everybody,
> I had a hard drive failure last week. After lots of effort I've been able to
> backup a 700GB database, with only one file with corruption.

> When I do some big queries, it throws me errors on this faulty file:
> could not read block 390041 of relation 1663/350994/351212: read only 0 of
> 8192 bytes

I'm guessing this is the result of an index entry pointing to a block
that's not there --- either the index is corrupted, or you lost some
data.  In any case, reindexing the table ought to get rid of this error.

			regards, tom lane



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