pg_restore data block error

Dear All:

I am trying to restore a database (size is about 7GB) from a dump file
created by a simple backup script..The format is data.pg.

The schema restores fine, but during the data restore, i get the
following error:

-bash-2.05b$ pg_restore -a -d access backups/access/data.pg
pg_restore: [custom archiver] could not read data block -- expected
4096, got 3608

I tried this twice now, with backups taken on different days...

I am dumping from 7.2.4 (RH8 - RAID5 set) to 7.4.0 (RH9).

Any ideas please?

Thanks,
Anjan
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