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Replace HDD with Reallocated Sectors Count flagged? #4976768
01/12/19 08:49 AM
01/12/19 08:49 AM
Joined: Jul 2005
Posts: 31,694
NY
demarpaint Offline OP
demarpaint  Offline OP

Joined: Jul 2005
Posts: 31,694
NY
I'm setting up an older Laptop with Win 10. The OS is on an SSD and the data is on a 500GB HDD. Crystal Disk is telling me the health status is "Caution" for the data HDD, everything seems OK with the disk but to play it safe I'm going to replace it.

It has Reallocated Sectors Count flagged, and nothing else.

Current 100
Worst 100
Threshold 30.

I have another 500GB HDD sitting here that Crystal Disk states is "GOOD". Nothing is flagged but the numbers for what was flagged with the other HDD are the same.

Current 100
Worst 100
Threshold 30.

What's the story? Both drives have a little under 2500 hours on them. Should I just bounce for another HDD? This machine is fully backed up and not used for anything important, I'd rather use the money for something else if I can get away with using the HDD that's "GOOD".

Thanks!

Last edited by wwillson; 01/12/19 10:53 AM. Reason: subject clarification

God Bless Our Troops

Re: Replace HDD with Reallocated Sectors Count flagged? [Re: demarpaint] #4976812
01/12/19 09:42 AM
01/12/19 09:42 AM
Joined: Oct 2018
Posts: 81
D-FW, Texas
WagonWheel Offline
WagonWheel  Offline

Joined: Oct 2018
Posts: 81
D-FW, Texas
I would download / trust the diag software from the HDD manufacture vs using 3rd party tools.

I would go for SSDs as you replace HDDs, much more reliable.


2003 Honda Accord 2.4L 5AT - 142k miles
2006 Honda Odyssey 3.5L 115k miles
Re: Replace HDD with Reallocated Sectors Count flagged? [Re: WagonWheel] #4976816
01/12/19 09:48 AM
01/12/19 09:48 AM
Joined: May 2017
Posts: 35
IL,US
DzoG20 Offline
DzoG20  Offline

Joined: May 2017
Posts: 35
IL,US
What it the RAW value for the Reallocated Sectors Count (and Reallocated Event Count ) ?
If it is not zero - I wold replace the HDD

Re: Replace HDD with Reallocated Sectors Count flagged? [Re: demarpaint] #4976907
01/12/19 11:37 AM
01/12/19 11:37 AM
Joined: Aug 2008
Posts: 24,131
ON, Canada eh?
StevieC Offline
StevieC  Offline

Joined: Aug 2008
Posts: 24,131
ON, Canada eh?
I'd replace it, drives are cheap. Loosing data sucks and not knowing if you are sitting on a ticking time bomb isn't good to start out with.


Last edited by StevieC; 01/12/19 11:38 AM.

'18 Dodge Grand Caravan GT - 25k KM - AMSOIL SS 0w20

Fear 20wt oils if you want your engine to last. smirk2
Re: Replace HDD with Reallocated Sectors Count flagged? [Re: DzoG20] #4976951
01/12/19 12:31 PM
01/12/19 12:31 PM
Joined: Jul 2005
Posts: 31,694
NY
demarpaint Offline OP
demarpaint  Offline OP

Joined: Jul 2005
Posts: 31,694
NY
Originally Posted by DzoG20
What it the RAW value for the Reallocated Sectors Count (and Reallocated Event Count ) ?
If it is not zero - I wold replace the HDD


Thanks for the replies. It is 000000000001, the drive I have on hand to replace it with is 000000000000. I'd rather not spend the money on a new SSD drive. I can get a NIB WD Black in 500GB for under $40 delivered. But if the drive I have on hand is good, as I mentioned I'd rather spend the $$ elsewhere. My data is backed up several times to different computers, and an alternate location.


God Bless Our Troops

Re: Replace HDD with Reallocated Sectors Count flagged? [Re: demarpaint] #4976973
01/12/19 12:58 PM
01/12/19 12:58 PM
Joined: Aug 2008
Posts: 24,131
ON, Canada eh?
StevieC Offline
StevieC  Offline

Joined: Aug 2008
Posts: 24,131
ON, Canada eh?
If you have a good back-up plan and can spend a day restoring and don't mind the possibility of having to fix it at a later date, then run what you have. If it were me I would sell of the affected drive as used and use a new one report 0 defects. Just me though.


'18 Dodge Grand Caravan GT - 25k KM - AMSOIL SS 0w20

Fear 20wt oils if you want your engine to last. smirk2
Re: Replace HDD with Reallocated Sectors Count flagged? [Re: StevieC] #4976987
01/12/19 01:08 PM
01/12/19 01:08 PM
Joined: Jul 2005
Posts: 31,694
NY
demarpaint Offline OP
demarpaint  Offline OP

Joined: Jul 2005
Posts: 31,694
NY
Originally Posted by StevieC
If you have a good back-up plan and can spend a day restoring and don't mind the possibility of having to fix it at a later date, then run what you have. If it were me I would sell of the affected drive as used and use a new one report 0 defects. Just me though.


The replacement drive I have on hand has 0 defects according to Chrystal Disk. The OS is on an SSD drive. Data can be restored in about an hour. As I mentioned I have several backups and also in an alternate location. In fact this machine contains one of 6 back ups.


God Bless Our Troops

Re: Replace HDD with Reallocated Sectors Count flagged? [Re: demarpaint] #4976991
01/12/19 01:09 PM
01/12/19 01:09 PM
Joined: Aug 2008
Posts: 24,131
ON, Canada eh?
StevieC Offline
StevieC  Offline

Joined: Aug 2008
Posts: 24,131
ON, Canada eh?
Then run it.


'18 Dodge Grand Caravan GT - 25k KM - AMSOIL SS 0w20

Fear 20wt oils if you want your engine to last. smirk2
Re: Replace HDD with Reallocated Sectors Count flagged? [Re: demarpaint] #4976997
01/12/19 01:14 PM
01/12/19 01:14 PM
Joined: Mar 2011
Posts: 1,949
CA
spackard Offline
spackard  Offline

Joined: Mar 2011
Posts: 1,949
CA
Reallocated sector count is an okay proxy for pending failure.
As far as I can tell, all the promise of SMART fell flat. (A manager/engineer pushed this as a 'big thing' way back, so I'm sensitive to it.)

The enterprise storage vendors eventually made custom software to time the milliseconds needed to commit a write, and made predictive failure algorithms based on that. They also do regular data scrubbing.

If you weren't the type to do real-time timing, then reallocated sector count is a weak 2nd place trophy substitute.
I've seen a few new HDDs with non-zero counts, so a HDD having a very low number isn't necessarily bad,
but the count doesn't increment until a write is attempted, fails several times, and a reallocation then takes place.
A HDD can feel horrible, but if you're only reading from a sector, and not writing, then it won't reallocate the sector.

If you want to use it, run a complete disk wipe on it (something that writes a difficult pattern, then reads), which takes a couple of days.
If the reallocated sector count increases at all, toss it, as I've tried this and seen the count increase over and over again, once it starts.
If it's over 10, toss it. It'll be a bit slow with a few files.

Re: Replace HDD with Reallocated Sectors Count flagged? [Re: spackard] #4977017
01/12/19 01:32 PM
01/12/19 01:32 PM
Joined: Jul 2005
Posts: 31,694
NY
demarpaint Offline OP
demarpaint  Offline OP

Joined: Jul 2005
Posts: 31,694
NY
Originally Posted by spackard
Reallocated sector count is an okay proxy for pending failure.
As far as I can tell, all the promise of SMART fell flat. (A manager/engineer pushed this as a 'big thing' way back, so I'm sensitive to it.)

The enterprise storage vendors eventually made custom software to time the milliseconds needed to commit a write, and made predictive failure algorithms based on that. They also do regular data scrubbing.

If you weren't the type to do real-time timing, then reallocated sector count is a weak 2nd place trophy substitute.
I've seen a few new HDDs with non-zero counts, so a HDD having a very low number isn't necessarily bad,
but the count doesn't increment until a write is attempted, fails several times, and a reallocation then takes place.
A HDD can feel horrible, but if you're only reading from a sector, and not writing, then it won't reallocate the sector.

If you want to use it, run a complete disk wipe on it (something that writes a difficult pattern, then reads), which takes a couple of days.
If the reallocated sector count increases at all, toss it, as I've tried this and seen the count increase over and over again, once it starts.
If it's over 10, toss it. It'll be a bit slow with a few files.



I'd be interested in trying that just for the sake of experimentation/learning. Is there some kind of freeware I can get to do that? Thanks.


God Bless Our Troops

Re: Replace HDD with Reallocated Sectors Count flagged? [Re: demarpaint] #4977087
01/12/19 03:14 PM
01/12/19 03:14 PM
Joined: Apr 2017
Posts: 1,807
San Rafael, CA
dogememe Offline
dogememe  Offline

Joined: Apr 2017
Posts: 1,807
San Rafael, CA
Some drives fail shortly after having reallocated sectors while some live on for years and years. I'd say scrap it and buy a new drive. Mechanical HDDs are so dirt cheap. Even better, upgrade to a solid state drive. I have a fleet of SSDs of various brands, Intel, Kingston, Crucial, Samsung, 0 failures. Some of them with insanely high writes due to being used in servers. Unless you buy some WingDingChinaGeneric SSD you can't beat the reliability of SSDs.

Last edited by dogememe; 01/12/19 03:16 PM.

2010 Ford Escape 2.5 ~94K Miles: Royal Purple 5W-30 + Wix 51348
2008 Ford Crown Vic P71 4.6 ~167K Miles: AMSOIL SS 0W-30 + Wix 51372
1995 Chevy Silverado 5.7 ~277K Miles: Delo 10W-30 + ACDelco PF52
Re: Replace HDD with Reallocated Sectors Count flagged? [Re: demarpaint] #4977132
01/12/19 03:52 PM
01/12/19 03:52 PM
Joined: Aug 2003
Posts: 13,438
NE,Ohio
Rand Offline
Rand  Offline

Joined: Aug 2003
Posts: 13,438
NE,Ohio
I've had an old crusty samsung brand 2tb drive that said caution 5 years ago..
since its just my torrent drive I dont really care if it fails or I lose data.

numbers dont seem to be increasing. It is very slow when its over 75% full sometimes dipping under 20MB/sec

baddrive.jpg

2019 Jeep Cherokee Trailhawk 2.0T
Re: Replace HDD with Reallocated Sectors Count flagged? [Re: demarpaint] #4977201
01/12/19 05:12 PM
01/12/19 05:12 PM
Joined: Jul 2005
Posts: 31,694
NY
demarpaint Offline OP
demarpaint  Offline OP

Joined: Jul 2005
Posts: 31,694
NY
Thanks. ^ I copied the data to the spare 500GB HDD I had. It checks out OK with Crystal Disk. The laptop in question is about 9 years old now, and I couldn't justify the money for a replacement HDD when I had one laying around. I'll probably buy a new Laptop toward the end of the year. I had no idea what any of the Crystal Disk numbers meant in the real world. I learned a lot from this thread.


God Bless Our Troops

Re: Replace HDD with Reallocated Sectors Count flagged? [Re: demarpaint] #4977562
01/13/19 12:21 AM
01/13/19 12:21 AM
Joined: Mar 2011
Posts: 1,949
CA
spackard Offline
spackard  Offline

Joined: Mar 2011
Posts: 1,949
CA
Freeware for wiping a HDD: I use DBAN.
This webpage looks like it walks a person through how to use it (at a beginner's level)
https://www.lifewire.com/how-to-erase-a-hard-drive-using-dban-2619148

DoD 5220.22-M three-pass: Overwrite the data with a value, then with the inverse of that value, then with a random value, verifying the write after each step. The first two wipes theoretically pull the magnetic field fully one direction, then fully the other, eliminating any residue of the original value.

Re: Replace HDD with Reallocated Sectors Count flagged? [Re: spackard] #4977641
01/13/19 03:47 AM
01/13/19 03:47 AM
Joined: Dec 2009
Posts: 26,901
Regina, Saskatchewan, Canada
Garak Offline
Garak  Offline

Joined: Dec 2009
Posts: 26,901
Regina, Saskatchewan, Canada
demarpaint has Linux, as well, so if swapping hard drives around, he always has some secure wipe/delete utilities available there, too.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
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