luca2 Posted December 13, 2011 Posted December 13, 2011 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
dgaschk Posted December 13, 2011 Posted December 13, 2011 Look for any attribute that says failing_now or any reallocated sectors.
Joe L. Posted December 13, 2011 Posted December 13, 2011 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,
luca2 Posted December 13, 2011 Author Posted December 13, 2011 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?
WeeboTech Posted December 14, 2011 Posted December 14, 2011 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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