Adam Witney <awitney@xxxxxxxxxx> writes: > Whats the best way to zero the bad block? Probably dd from /dev/zero, along the lines of dd bs=8k seek=597621 count=1 conv=notrunc if=/dev/zero of=relation (check this before you apply it ;-)). You probably should stop the postmaster while doing this, in case it has a cached copy of the page. regards, tom lane