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Reallocation Event Count - how critical for external drive?


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#1 GoshenBleeping

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Posted 09 September 2013 - 08:02 PM

System: Windows 7 Home Premium, SP1, 64 bit
 
I just purchased & starting using a Seagate external "Expansion" drive, model STBX500100. After 2 days of use, I used HDDScan to look at the SMART values. HDDScan reported a problem with the SMART attribute "Reallocation Event Count" - the value was 100 and the threshold was listed as 30. All other SMART values were in the green. I don't know how to interpret this data. Does this mean the drive is faulty & I should return it? Should I ignore this data? Or just watch it over time?
 
Thank you.

 



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#2 GoshenBleeping

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Posted 09 September 2013 - 08:09 PM

I forgot to post all of the SMART values - see below:

 

Model: ST500LT012-9WS142
Firmware: 0001SDM1
Serial: W0VBMAFJ
LBA: 976773167
 
Report By: HDDScan for Windows version 3.3
Report Date: 9/9/2013 9:06:41 PM
 
 
 Num  Attribute Name  Value  Worst  Raw(hex)  Threshold  
 
 001 Raw Read Error Rate  115 100 0000000579-11A0 006 
 
 003 Spin Up Time  099 099 0000000000-0000 000 
 
 004 Start/Stop Count  100 100 0000000000-0013 020 
 
 005 Reallocation Sector Count  100 100 0000000000-0000 036 
 
 007 Seek Error Rate  100 253 0000000002-1AE9 030 
 
 009 Power-On Hours Count  100 100 1949060000-000F 000 
 
 010 Spin Retry Count  100 100 0000000000-0000 097 
 
 012 Device Power Cycle Count  100 100 0000000000-0013 020 
 
 184 End To End Error Count  100 100 0000000000-0000 099 
 
 187 Reported Uncorrectable Error  100 100 0000000000-0000 000 
 
 188 Reported Command Timeouts  100 100 0000000000-0000 000 
 
 189 High Fly Writes  100 100 0000000000-0000 000 
 
 190 Airflow Temperature  067 053 33 C  045 
 
 190 Airflow Temperature Minimum 067 053 33 C 045 
 
 190 Airflow Temperature Maximum 067 053 33 C 045 
 
 191 G-sense Rate/Servo tracking  100 100 0000000000-0000 000 
 
 192 Emergency Retract Count  100 100 0000000000-000A 000 
 
 193 Load/unload Cycle Count  100 100 0000000000-026D 000 
 
 194 HDA Temperature  033 047 33 C  000 
 
 194 HDA Temperature Minimum 033 047 23 C 000 
 
 194 HDA Temperature Maximum 033 047 53 C 000 
 
 196 Reallocation Event Count  100 100 264F740000-0006 030 <== PROBLEM IS HERE
 
 197 Current Pending Errors Count  100 100 0000000000-0000 000 
 
 198 Uncorrectable Errors Count  100 100 0000000000-0000 000 
 
 199 UltraDMA CRC Errors  200 200 0000000000-0000 000 
 
 240 Heads Flying Hours  100 100 264F740000-0006 000 
 
 241 Total Host Writes  100 253 00000000D5-4130 000 
 
 242 Total Host Reads  100 253 0000000014-69FA 000 
 
 254 G-shock/Free-fall Event Count 100 100 0000000000-0000 000 


#3 jhayz

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Posted 09 September 2013 - 10:00 PM

The threshold is not an important value to predict failures. http://www.hdsentinel.com/smart/index.php


 

Most problems with S.M.A.R.T. (lack of failure prediction) are caused by incorrectly selected Thresholds. Because of this, the hard disk attributes have no chance to reach the thresholds - usually they fail (become useless) before reaching this point. In such cases, S.M.A.R.T. really does not predict the failure.

 

 

Reallocation Event Count These are usually current pending sector counts transferred to a good spare sector.


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#4 GoshenBleeping

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Posted 10 September 2013 - 07:49 AM

Thank you for the information. What is your advice as to what I should do with this drive? 

 

   David



#5 Platypus

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Posted 10 September 2013 - 07:56 AM

Since different manufacturers implement their own sets of parameters for SMART, you can't be sure a generic utility is reporting a given drive correctly. I'd suggest checking the drive with Seagate SeaTools:

 

http://knowledge.seagate.com/articles/en_US/FAQ/203971en


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#6 GoshenBleeping

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Posted 10 September 2013 - 01:35 PM

To close out this thread:

 

I installed Seagate SeaTools for Windows. The drive passed the "Short Drive Self Test" and "Short Generic" tests so I assume the drive is fine.

I had hesitated to install the SeaTools utility since it also required .Net Framework 4 Extended. But I finally install this plus Seatools.

 

Thanks again for the help.

 

    David



#7 rotor123

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Posted 10 September 2013 - 03:11 PM

Hi, I would still run the Long test.

 

Good Luck

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#8 Platypus

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Posted 10 September 2013 - 04:47 PM

Since you don't mention whether you confirmed the SMART status, I suggest do this if you haven't already, since this is what HDD Scan is reporting on. If you don't yet have much stored on the drive, another way to cross check is to do a zero fill (which will erase the contents) on the drive and analyze again with HDD Scan. If a pending sector count is being correctly reported, this should reset after zero filling. If HDD Scan's report doesn't reflect the change, you could reasonably conclude it's misreading that parameter.


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#9 jhayz

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Posted 10 September 2013 - 07:09 PM

What is your advice as to what I should do with this drive?

If it was my drive, I would not use it for important matters meaning only for secondary usage. There are primary and secondary backups for data and files. But since it is still under warranty, check if there is a returned policy regarding these readings.


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#10 GoshenBleeping

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Posted 12 September 2013 - 11:29 AM

I am taking Forum Addict's advice and returning the drive. Amazon is shipping a new drive and is paying my return shipping for the old drive so I have nothing to lose by getting a new one. I'll run the Seagate diagnostics on the new drive before I use it.



#11 hamluis

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Posted 18 September 2013 - 05:55 PM

If you do that...save the results...they will give you a baseline to compare to as time goes on with that drive.

 

Louis






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