Help with failing(?) Hard Disk and SMART

dlynch121

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Jan 1, 2015
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Hi,

Having some troubles with one (or maybe more) of my hard disks, but I'm a little confused interpreting the S.M.A.R.T. results.

I have 3 disks, C: is an SSD which has no problems, then 2 storage drives D: and E:.

E: is a 1TB Seagate drive which I installed as a media drive, no problems (I hope?).

D: is a 750GB Seagate drive which came with the computer. I've recently had the "Windows has detected a hard disk problem" error message numerous times in relation to this drive.

I'm not worried about losing data as everything is backed up to a NAS, plus everything important is also on the E:; however from all the research I've done it looks like my drive is doomed and I need to get myself a replacement.

What confuses me is I have used CrystalDisk and HDDScan which both report all good apart from Reallocated Sectors Count. Under this, D: has a "Bad" in CrystalDisk and a scary red cross in HDDScan, but it has a value of 23 when the threshold is 36. From my understanding of reallocated sectors less is certainly better, and this drive seems to be below the threshold? What am I misunderstanding?

In contrast the E: is reporting a caution against reallocated sectors count, but the value is 88? This is way over the threshold of 36, and yet it's apparently better than D:?

Also I tried these programs on another PC with a WD HD, which showed a value of 200 under reallocated sectors and a threshold of 140 - but the drive health was perfect!

Please can someone bring me up to speed on what these results mean?

Many thanks.

Edit: Screenshots of CrystalDisk:

PmND32I.png


MLPYn1h.png

 
Solution
In SMART data high numbers are good numbers. Low numbers are always bad. That number isn't the number of reallocated sectors, it's just a starting number that drops everytime a sector is remapped. The drive is dying, trash bin it.

DataMedic

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Nov 22, 2013
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In SMART data high numbers are good numbers. Low numbers are always bad. That number isn't the number of reallocated sectors, it's just a starting number that drops everytime a sector is remapped. The drive is dying, trash bin it.
 
Solution

dlynch121

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Jan 1, 2015
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Thankyou, this makes sense as I could have sworn it said 24 when I first ran CD, but it's definitely now 23!

Should I be worried about the E: at 88? Or should that have a fair bit of life left in it?
 

DataMedic

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Nov 22, 2013
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The threshold being at 36, it might be fine (I don't know what the starting number is as it varies by model though I'd guess 100 from the other numbers). I'd just check it every so often and see if the number is dropping. If not, it could still last a long time. Just make sure not to trust it with anything important that isn't backed up.
 

dlynch121

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Jan 1, 2015
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That's great, it's not backed up but it's a media drive with movies and music - nothing that can't be re-downloaded or ripped (have all original CDs/DVDs). I'll keep an eye on it.

Many thanks for your help!
 
The ST31000528AS drive has 528 (= 0x210) reallocated sectors. I wouldn't trust it with your data.

http://www.google.com/search?q=0x210+in+decimal

The ST3750528AS has 3164 (= 0xC5C) reallocated sectors.

The Current value has dropped from 100 to 23, so this means that each point corresponds to about 41 (= 3164 / 77) reallocated sectors. This means that the drive could have developed around 40 additional defects since the last time you examined it.

Similarly, the other drive loses one point for every 40 or so (= 528 / 12) bads.
 

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