Hi,

The preclear script has finished running on my two WD20EARS drives and I don't know how to interpret the SMART results. I attached the syslog to this post.

 

Both disks got the message below, does that mean I'm good to go?

Dec  1 00:44:04 Tower preclear_disk-finish[13936]: SMART overall-health self-assessment test result: PASSED

 

Both disks got similar results, the only difference was that one of the disks had a Spin_Up_Time of 6175 and the other 1175. What does that mean?

 

SMART Attributes Data Structure revision number: 16

Vendor Specific SMART Attributes with Thresholds:

ID# ATTRIBUTE_NAME          FLAG    VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE

1 Raw_Read_Error_Rate      0x002f  100  253  051    Pre-fail  Always      -      0

3 Spin_Up_Time                  0x0027  176  173  021    Pre-fail  Always      -      6175

4 Start_Stop_Count            0x0032  100  100  000    Old_age  Always      -      15

5 Reallocated_Sector_Ct      0x0033  200  200  140    Pre-fail  Always      -      0

7 Seek_Error_Rate              0x002e  100  253  000    Old_age  Always      -      0

9 Power_On_Hours              0x0032  100  100  000    Old_age  Always      -      0

10 Spin_Retry_Count            0x0032  100  253  000    Old_age  Always      -      0

11 Calibration_Retry_Count    0x0032  100  253  000    Old_age  Always      -      0

12 Power_Cycle_Count          0x0032  100  100  000    Old_age  Always      -      13

192 Power-Off_Retract_Count 0x0032  200  200  000    Old_age  Always      -      12

193 Load_Cycle_Count          0x0032  200  200  000    Old_age  Always      -      21

196 Reallocated_Event_Count 0x0032  200  200  000    Old_age  Always      -      0

197 Current_Pending_Sector  0x0032  200  200  000    Old_age  Always      -      0

198 Offline_Uncorrectable      0x0030  100  253  000    Old_age  Offline      -      0

199 UDMA_CRC_Error_Count  0x0032  200  253  000    Old_age  Always      -      0

200 Multi_Zone_Error_Rate    0x0008  100  253  000    Old_age  Offline      -      0

 

I also got this result:

S.M.A.R.T. error count differences detected after pre-clear

note, some 'raw' values may change, but not be an indication of a problem

54c54

<  1 Raw_Read_Error_Rate    0x002f  100  253  051    Pre-fail  Always      -      0

---

>  1 Raw_Read_Error_Rate    0x002f  200  200  051    Pre-fail  Always      -      0

63c63

< 193 Load_Cycle_Count        0x0032  200  200  000    Old_age  Always      -      20

---

> 193 Load_Cycle_Count        0x0032  200  200  000    Old_age  Always      -      22

67c67

< 199 UDMA_CRC_Error_Count    0x0032  200  253  000    Old_age  Always      -      0

---

> 199 UDMA_CRC_Error_Count    0x0032  200  200  000    Old_age  Always      -      6

 

The other drive had UDMA_CRC_Error_Count = 0. Do I need to be concerned about this drive that had UDMA_CRC_Error_Count = 6?

syslog.txt

The drive looks good.

 

The "worst" values of 253 are the factory values indicating the drive has never been used.   Those values are changed to either 100 or 200 once the drive gets some use and then those "starting" values go downward from there as errors are detected over the disk's lifetime.

 

Your disk just shows those initial values being set.  It is perfectly fine.  When the "normalized VALUE" drops below the failure THRESHold the SMART firmware will consider the disk as failed.

 

Joe L.

More references

http://smartlinux.sourceforge.net/smart/attributes.php

http://www.ariolic.com/activesmart/smart-attributes/

http://www.ntfs.com/disk-monitor-smart-attributes.htm

 

Most RAW_VALUEs can only be interpreted by the manufacturer. Pending Sectors, Uncorrectable, and Reallocated are a few that should be monitored.

 

Thanks for the explanation, good to know!