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Reallocated Sectors Count: Should I be worried?

Discussion in 'Storage' started by entropy13, May 8, 2012.

  1. entropy13

    entropy13

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    According to CrystalDiskInfo, one of my drives is under "Caution", specifically because of Reallocated Sectors Count. It's currently at 99 (Raw value: 000000000033). Is failure imminent?
  2. AlienIsGOD

    AlienIsGOD

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    I have a WD Blue 1 TB that does the same thing, started a week after I bought it. I would also like to know the implications of this.
    Crunching for Team TPU
  3. Solaris17

    Solaris17 Creator Solaris Utility DVD

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    i have a 1TB sammy F3 i think i got it years ago and it did this after about a month. the bigger the drive the more can happen. like new graphics cards the more sophisticated the easier they break. every HDD is alocated "extra space" in reserve for problems like this. that said while it can mean the drive is failing it depends on how fast it is finding sectors. which also depends on how much data you keep on it. my particular one has about 200gb left and the sector count hasnt gone up. but it does have bad ones and its been years. its still working fine and iv had no issue with any of the data on it.

    bad sectors are going to happen. what you want to look for imo other then bad sectors is retry count. if that is incredibly high that means the drive is having problems reading/writing data. that could point to almost imminent failure.
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  4. lilhasselhoffer

    lilhasselhoffer

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    Every drive has the occasional defects in manufacturing. These defects prevent reading/writing to a sector. As a way to combat this, the sectors that are flagged as damaged are moved, or reallocated.

    As every drive series is different, sector reallocation is a poor indicator of drive health. Some large drives don't have enough data (user submitted records of "good" drive information), so they default to the danger readings of much smaller drives.


    In short, you should worry if reallocated sectors is increasing consistently. If the number is constant after several boots, then it isn't a problem. If it increases consistently then you should be worried.
    AlienIsGOD, entropy13 and Solaris17 say thanks.
  5. Solaris17

    Solaris17 Creator Solaris Utility DVD

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    you wrote that way better than i did. :toast:
  6. lilhasselhoffer

    lilhasselhoffer

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    Much obliged.
  7. CaptainFailcon New Member

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    disable head-parking if you have a WD green drive or early WD blue
  8. W1zzard

    W1zzard Administrator Staff Member

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    if you have a WD drive and that number keeps going up, or the drive shows hangs while accessing, RMA it.
    WD offers to send you a drive before you send yours, so easy to transfer data
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  9. entropy13

    entropy13

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    I haven't really noticed until now, but the last time I ran CrystalDiskInfo it certainly isn't "Caution" for that drive because of Reallocated Sectors Count.

    It's quite an old HDD already though, I bought it when I still had an i7 920 and a HD 4870.
  10. Solaris17

    Solaris17 Creator Solaris Utility DVD

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    just watch it. no need to do it excessivly but a weekly check of the bad sector count should give you a yes or no within a few weeks.
  11. AlienIsGOD

    AlienIsGOD

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    So i checked my S/N and whatnot and it seems my drive IS still under warranty till Aug 2013. Now the crappy (IMO) part.

    First off its a Seagate drive, not a WD. Secondly, they want some bullshit 2 inch thick foam rubber holder thing to accept warranty. Where can i find these in Canada, and do I even need to use it or not? http://www.reflexpackaging.com/index.php?option=com_content&view=article&id=103&Itemid=110 thats what they want to return the drive.
    Crunching for Team TPU
  12. Kreij

    Kreij Senior Monkey Moderator Staff Member

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    Just wrap it really good in bubble wrap (like 4-5 inches thick) and put it in a large box than they send it in.
    I've never had a problem with them accepting an RMA if it was packaged well.

    Make SURE you put a copy of the RMA information in with the package, and make sure the RMA number is written on the outside of the box (I usually write it on all six sides).
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  13. qubit

    qubit Overclocked quantum bit

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    You see stuff like that, you change the drive. End of. Hopefully it's still under warranty and you can rma it.

    Hope you have a backup of the data on it? If not, do it, asap.

    Good advice as usual, K. :)
  14. AlienIsGOD

    AlienIsGOD

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    So i called Seagate again and the rep mad note of me not having the dumb cushions, she also noted that i should use anti-static bubble wrap and whatnot and the RMA will NOT be refused for using that packaging. It also only has to go just past Toronto for mailing so the cost of the bubble wrap wont be of concern as the distance and weight of the HD isn't very much ( or so i would assume :p)
    Crunching for Team TPU
  15. Kreij

    Kreij Senior Monkey Moderator Staff Member

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    Just put the drive in an anti-static bag and then in the bubble wrap. :)


    For a bit of clarification on the SMART relocation errors.

    Bad sectors are a failure of the medium. This could be isolated to a particular spot due to the manufacturing process and never progress further, or it could be an overall degredation of the medium over time that will lead to catastrrophic failure.
    When a read/write/verification error occurs, a remapping of the sector is attempted. If the sector is bad enough the data may not be salvageable on the remap. These will show up as unsuccessful remaps.

    Relocation errors are not a sign of impending doom, but if you read through Googles statistics on hard drive failures you will see that when a drive throws relocation errors there is a significant statistical probability that the drive will fail sooner than one that is not exhibiting this behavior.

    There is no data which correlates disk usage to bad sectors at all. So if someone tells you that because you are hammering your hard drives it will lead to bad sectors, they are full of shit.

    What is significant statistical probability?
    It means that when you review lots of occurances there is a consistant trend that most will fall at some point in a statistical curve of failure or survival.

    What does sooner mean?
    Could still last for years and die of something else before the bad sector growth eats it alive.
    As was stated, the rate of the bad sector growth is more indicative of impending doom than just the fact that sectors have been remapped.
    Last edited: May 8, 2012
  16. hat

    hat Maximum Overclocker

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    Yeah, if I were handling RMAs I would see no reason not to accept that sort of packaging. I've gotten drives from newegg that were packaged much worse...
    Crunching for Team TPU
  17. CaptainFailcon New Member

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    I once got a hard drive that was just thrown in a single layer of bubble wrap and then placed at the bottem of the box :shadedshu
  18. Kreij

    Kreij Senior Monkey Moderator Staff Member

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    Some people just stuff them into padded envelopes and send them back. :wtf:
    That's why manufacturers usually require a minimum packaging requirement.
    They prefer the original packaging, but as long as it's sufficient to prevent shock damage they are usually okay with it.
    Same with monitors and other items. It's impossible for a manufacturer to expect a company that uses dozens of hundreds of components to keep all the original boxes.
    AlienIsGOD says thanks.
  19. entropy13

    entropy13

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    There are some weird sounds...and it seems it's coming from that drive. Ugh.
  20. CaptainFailcon New Member

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    clicking is bad ....
  21. Vinska

    Vinska

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    Is my hard drive failing? [current pending sector count]

    Edit: This was supposed to be a new thread. Yet for some reason, it attached itself to this one. *shrug*
    Note: There was a similar thread Here, but I thought it would be for the best not to "hijack" it, so I decided to start a new one. If this judgment of mine is bad, mods, please move/merge it. Thank You!
    /edit

    About a WD15EARS-00MVB0 (WD Caviar Green).
    I checked SMART data of my HDDs again not long ago, and I noticed, that one of my drives has a warning on:

    Code:
    ID: 197
    Current Pending Sector Count
    
    Normalized: 196
    Worst: 196
    Threshold: 0
    Value: 997 sectors
    
    Raw: 0xE50300000000
    "Number of sectors waiting to be remapped. If the sector waiting to be remapped is subsequently written or read successfully, this value is decreased and the sector is not remapped. Read errors on the sector will not remap the sector, it will only be remapped on a failed write attempt."

    That is the current reading. At the moment I spotted this, it was 1022 (so it decreased). Though, Reallocated Sector Count && Reallocation Count (IDs 5 & 196) are both at 0, so it seems those few sectors had been "recovered".
    I ran chkdsk /f /r on Window$ (as of it 97% is in an NTFS partition), it found nothing wrong with that drive. Also ran HDD Regenerator - it also found nothing.

    Should I be worried? Is this enough of an "excuse" to RMA it?

    Also:
    I was wondering, if this "sending a drive before" is available in my region, or is it only for the US?
    Crunching for Team TPU
  22. Vinska

    Vinska

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  23. fahadghouri New Member

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    brand new seagate barracuda 2 tb 7200 rpm

    Hi,

    I have just got my hard drive and after running crystal disk info, hd tune and HDDScan it says it has reallocated sector count value 100, worst 100, raw 181, threshold 036.

    It is brand new drive and i checked it before putting data in it with above mentioned utilities. After putting data its the same and its been a week now.

    I have attached a screenshot please help me decide to send hard drive back to vendor or should i keep it ? hard drive is working fine though.

    Thanks for your time.

    Attached Files:

  24. OneMoar

    OneMoar

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    Probly a SMART error ignore it ..
  25. fahadghouri New Member

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    thanks for your response, i have checked it with all 3 major hdd utilities, it may be an error but i need to make sure as i am willing to fill it up. just an idea from experts. thanks.

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