I have errors that I assume are from the HDD that I am preclearing (I'm not sure how to tell from the logs). However at the end of preclearing, it says successful. I am still in the window of opportunity to return this HDD, however I'd like to be sure it is bad before I return it. Attached is my log file.

 

Sorry if this a rudimentary question, I'm new to unraid. 

syslog-2012-09-08.txt

the disk is bad.  Although it can be read, the raw read error rate is too high to pass the internal SMART tests.

It has nothing to do with unRAId, or the preclear process, other than the disk had already marked over 700 sectors as un-readable, but apparently was able to read them after re-writing them.

 

The raw-read-error rate is too high to pass the SMART tests though, although it is apparently eventually reading the sectors, after many retries, but having much difficulty.

RMA the drive!!!

*** Failing SMART Attributes in /tmp/smart_finish_sda ***

Sep  8 13:57:52 Tower preclear_disk-diff[24266]: ID# ATTRIBUTE_NAME          FLAG    VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE

Sep  8 13:57:52 Tower preclear_disk-diff[24266]:  1 Raw_Read_Error_Rate    0x002f  001  001  051    Pre-fail  Always  FAILING_NOW 127273

Sep  8 13:57:52 Tower preclear_disk-diff[24266]:

Sep  8 13:57:52 Tower preclear_disk-diff[24266]:  728 sectors were pending re-allocation before the start of the preclear.

Sep  8 13:57:52 Tower preclear_disk-diff[24266]:  728 sectors were pending re-allocation after pre-read in cycle 1 of 1.

Sep  8 13:57:52 Tower last message repeated 2 times

Sep  8 13:57:52 Tower preclear_disk-diff[24266]:  0 sectors were pending re-allocation after zero of disk in cycle 1 of 1.

Sep  8 13:57:52 Tower last message repeated 2 times

Sep  8 13:57:52 Tower preclear_disk-diff[24266]:  0 sectors are pending re-allocation at the end of the preclear,

Sep  8 13:57:52 Tower preclear_disk-diff[24266]:    a change of -728 in the number of sectors pending re-allocation.

Sep  8 13:57:52 Tower preclear_disk-diff[24266]:  21 sectors had been re-allocated before the start of the preclear.

Sep  8 13:57:52 Tower preclear_disk-diff[24266]:  21 sectors are re-allocated at the end of the preclear,

Sep  8 13:57:52 Tower preclear_disk-diff[24266]:    the number of sectors re-allocated did not change.

Sep  8 13:57:52 Tower preclear_disk-diff[24266]:  SMART overall-health status =  FAILED!

Will do. And thank you so much for taking the time to reply!!!

 

So the last thing you highlighted: "SMART overall-health status =  FAILED!" is basically what I am looking for to verify my results for next time?

No, you need to look at the whole picture.

 

There have been plenty of disks that pass SMART but are unable to pass preclear without new un-readable sectors showing every new cycle

Alrighty. More reading for me. 

 

Thanks again!