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doubt after preclearing


luca2

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Posted

Hi, I just finished preclearing my hdd. I attach the syslog.

I just want to make sure it is ok, since I am a newbie and there is a lot of info in the syslog.

Is there any particular value I should always check after preclearing to confirm it worked ok?

Rgds.

preclear_results.txt

Posted

It is not normal to have sectors pending re-allocation after pre-clearing.

 

3 sectors are pending re-allocation at the end of the preclear,

 

ok, so now what should I do. i guess i should do the preclear again, right?

Posted

It is not normal to have sectors pending re-allocation after pre-clearing.

 

3 sectors are pending re-allocation at the end of the preclear,

 

ok, so now what should I do. i guess i should do the preclear again, right?

 

Do a badblocks test in destructive write mode

It will do 4 passes of write/read with specific patterns to detect bad sectors.

The firmware may then reassign them.

 

Be very careful with the command line and the drive you are working on.

 

Add the -o /tmp/badblocks.lis to the command line. If there are any in that list the drive is not a good candidate for unRAID.

Check the smart logs after you run the badblocks. If there are any pending sectors, the drive is not a good candiate for unRAID.

 

Any pending sectors may eventually lead to a failure when trying make to recover a different failed drive.

 

badblocks -vs -w -o /tmp/badblocks.lis /dev/disk/by-id/(this is where if you use the serial number then you cannot go wrong with a mistaken drive).

 

I have the latest and greatest badblocks compiled on my google code link. See my sig or profile for link.

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