[plug] Failing disk drive

[Richard Meyer]

Thanks to all who replied - I'm going to try the cable replacement thing
and then get a new drive. 

They are both WD, but they are not the same size and bought about 6
months apart.

Now to unchain that wallet - moths fly out on the rare occasions I DO
open it.

Thanks all.

On Tue, 2008-04-15 at 10:39 +0800, Adam Davin wrote:
> Hi Richard, 
> 
> On Tue, 15 Apr 2008 10:11:08 +0800
> Richard Meyer <meyerri at westnet.com.au> wrote:
> 
> > 
> > OK, so if it says it's allocated all the alternate
> > blocks/tracks/whatever, they're still gone afterwards, and cannot be
> > reclaimed (except by manufacturer's tools)?
> > 
> > On Mon, 2008-04-14 at 19:05 -0700, Fred Janon wrote:
> > > Nope, the stats are stored in the drive by the drive firmware. Some
> > > are resettable by commands and some aren't if I remember correctly.
> > > The issue is that there is no real 100% standard for SMART and you
> > > need the manufacturer tools for the specific drives most likely.
> > > 
> <snip> 
> 
> I get the following messages in my syslog from the smartd monitor:
> 
> Apr  9 20:33:27 owl smartd[23109]: Device: /dev/hda, SMART Prefailure
> Attribute: 1 Raw_Read_Error_Rate changed from 58 to 59 
> Apr  9 20:33:27 owl smartd[23109]: Device: /dev/hda, SMART Prefailure
> Attribute: 1 Raw_Read_Error_Rate changed from 58 to 59 
> 
> Apr 10 06:33:27 owl smartd[23109]: Device: /dev/hda, SMART Prefailure
> Attribute: 1 Raw_Read_Error_Rate changed from 59 to 58 
> Apr 10 06:33:27 owl smartd[23109]: Device: /dev/hda, SMART Usage
> Attribute: 195 Hardware_ECC_Recovered changed from 59 to 58 
> 
> Apr 11 02:33:27 owl smartd[23109]: Device: /dev/hda, SMART Prefailure
> Attribute: 1 Raw_Read_Error_Rate changed from 58 to 57 
> Apr 11 02:33:27 owl smartd[23109]: Device: /dev/hda, SMART Usage
> Attribute: 195 Hardware_ECC_Recovered changed from 58 to 57 
> 
> Apr 12 21:33:27 owl smartd[23109]: Device: /dev/hda, SMART Prefailure
> Attribute: 1 Raw_Read_Error_Rate changed from 57 to 58 
> Apr 12 21:33:27 owl smartd[23109]: Device: /dev/hda, SMART Usage
> Attribute: 195 Hardware_ECC_Recovered changed from 57 to 58 
> 
> Which suggests that the drive may re-test bad errors and reallocate
> these if it finds them still "ok". Though I could be well wrong in
> these assumptions... 
> 
> It looks to me like the drive is pre-empting an error and "replacing"
> the sector just in case (tm) then rechecking the sector more
> thoroughly later on to then allow them back into service if they pass.. 
> 
> Regards, 
> 
-- 
Richard Meyer
Necessity is the plea for every infringement of human freedom.
It is the argument of tyrants; it is the creed of slaves. 
William Pitt, 1783

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