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Re: "One or more disks are failing" ?

On 09-07-04 06:42:16, Jussi Lehtola wrote:
> On Sat, 2009-07-04 at 02:57 -0700, Scott Beamer wrote:
> >   5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail 
> > Always      -       4
> This means your disk is breaking down, and should be replaced soon.

Nonsense.  He has a disk with 2 million sectors, and 4 sectors have 
been remapped.  Such a number is common.  Only if the number increases 
at an increasing rate is the disk failing.  That's why SMART has a 
threshold (10 here); note that the current value is 100.

> > 197 Current_Pending_Sector  0x0012   100   100   000    Old_age  
> > Always      -       2
> > 198 Offline_Uncorrectable   0x0030   100   100   000    Old_age
> > Offline      -       1
> And these IIRC mean that you've already lost some data. Replace the
> disk ASAP.

He has an unrecoverable sector.  If that sector was in use, it's data 
was lost.  If that sector was not in use, no data was lost.  If the 
number of uncorrectable sectors rises, that is a problem.

The OP should enable Automatic Offline Data Collection, which will scan 
the entire disk for bad sectors "every 4 hours", and remap them if they 
are still readable.  If sectors are unreadable when that is being done, 
then/ the disk needs replacement as data will surely be lost (sooner or 

$ sudo smartctl -o on /dev/sda

TonyN.:'                       <mailto:tonynelson georgeanelson com>
      '                              <http://www.georgeanelson.com/>

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