Re: DB corruption.

Jesper Krogh <jesper@krogh.cc> writes:
> On 2011-10-09 17:41, Tom Lane wrote:
>> The traditional solution is to zero out the bad block, eg using dd from
>> /dev/zero.  It's easy to zero more than you intended, so practicing on a
>> scratch copy of the table is recommended.

> So it is "just" blocknumber * blocksize .. offset, blocksize of zeroes.. ?
> Or is the math harder?

You have to account for the division of the table into segment files;
if blocknumber * blocksize is greater than 1GB, reduce modulo 1GB and
look to the appropriate "xxx.n" segment file.  Otherwise it's what
you'd expect.

            regards, tom lane