badblocks -vw

Mike McCarty Mike.McCarty at sbcglobal.net
Wed Dec 6 05:11:45 UTC 2006


Hadders wrote:
> Mike McCarty wrote:
> 
>>
>>
>> You've got some misconceptions. Those drives do sector remapping. Using
>> read/write tests won't detect this, as the FEC on the discs will hide
>> the errors. You need to query the disc itself for the knowledge it
>> has.
>>
>> # smartctl -a /dev/hdx
>> # hdparm -I /dev/hdx
>>
>> may help.
>>
>> Mike
> 
> Okay, that makes sense. But I need to write something to them to have 
> the FEC detect a failure and remap it?

You do that all the time when you use the disc. A new disc from
the manufacturer has already been through more stringent tests
than you can do at home. I look at that data about 2 or 3x per
year, and I haven't seen any errors on my disc yet.

Mike
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