smartctl reports bad sectors, badblocks does not find any

[Juan R. de Silva]

On Thu, 23 Dec 2010 22:36:46 +0000, Juan R. de Silva wrote:

> I did the stupidest thing I could as to forget that I was running on
> battery while installing FreeBSD on a free (1st) partition. and I found
> the laptop shutting down when it was too late.
> 
> After this event smartctl consistently reports Read Failure starting on
> LBA 26203589, Current_Pending_Sector 1, and Offline_Uncorrectable 4.
> This block is within partition in question. Thus I know I damaged hdd
> within its boundries.
> 
> Simply formating this partition certainly did not help.
> 
> I've run dd if=/dev/zero of=/dev/sda1 both starting with the reported
> LBA and then on the entire partition. And I still have same report from
> smartctl
> 
> I run badblocks on the partition firs in non-destructive and then in
> destructive (read/write) mode in both cases badblocks reported 0 errors.
> But smartctl still gives me the same report.
> 
> In all the cases I run smartctl -t offline /dev/sda1 just to ensure
> smartctl updates its data before I run final smartctl -A /dev/sda
> 
> Any suggestions folks? It drives me crazy. I'm fighting it 2 days for
> now.

Anybody to help? 

And, yes, I've forgotten to mention - I have a multiboot multidistro 
system running Fedora 13, Ubuntu 10.04, and openSuse 11.3. FreeBSD was 
dumped after the incident. 

Though I think it is not really relevant to the case.