How smart is S.M.A.R.T.?

[James Dugger]

I have Hitachis that are 2 years old running in raid 10 (MD) with no
issues.  An other array have had 1 WD black go bad.  I have one array that
I mixed drive brands (each 1.TB) w 1 Seagate Barracuda in the array (raid
10).  The Seagate always falls out of sync due to virtual blocking.

I'm trying WD reds next.
On Oct 19, 2014 8:51 PM, "George Toft" <george at georgetoft.com> wrote:

> Credible - hmmm - all I have is the vendor's assertion the drives were new
> from Seagate.  Times two vendors.
>
> For you WD fans out there - I just had 4 WD Enterprise drives fail on me
> in the past month (out of 18 in two arrays).  They were all dated Nov 2010
> - that should give you an indication how long they last under 24x7x365 use
> in a data center.
>
> Regards,
>
> George Toft
>
> On 10/17/2014 8:43 AM, techlists at phpcoderusa.com wrote:
>
>>
>> If you have credible evidence that Seagate is selling used Hitachi drives
>> as new and under their label I'm sure your State Attorney General would
>> like to hear from you.
>>
>>
>>
>>
>> On 2014-10-17 10:08, George Toft wrote:
>>
>>> How many [thousand] hours on the drive?  I think you're gambling if
>>> you have more than 26,000 hours (3 years) and ESPECIALLY if it's
>>> really a Hitachi drive.  Seagate bought Hitachi recently, and from
>>> what I've seen, are selling used Hitachi drives as "new" Seagate
>>> drives - check the model number and the run hours!
>>>
>>> Hard drives are killing me this year - I've spent over 80 hours in
>>> rework because of failed drives - especially with Seatachi drives (see
>>> above).  80 hours of rework at no pay is a painful lesson.
>>>
>>> Regards,
>>>
>>> George Toft
>>>
>>> On 9/11/2014 4:06 PM, parabellum7 at yahoo.com wrote:
>>>
>>>> Greetings!
>>>>
>>>>
>>>> I have a 500GB Seagate ST3500312CS SATA drive salvaged from a
>>>> decommissioned DVR. The DVR's OS said SMART status OK. The latest Seatools
>>>> disk utility from the Seagate website says the drive is A-OK (short test,
>>>> long test, full erase, re-test) no errors found.
>>>>
>>>> However, the Gnome disk utility in Mint 17 says 'Threshold not
>>>> exceeded' and 'Disk is OK, 178 bad sectors'.
>>>>
>>>> Some other SMART attributes displayed:
>>>>
>>>> ID1        Read Error Rate: 152141757
>>>> ID5      Reallocated Sector Count: 178 sectors
>>>> ID187     Reported Uncorrectable Errors: 0 sectors
>>>> ID198    Uncorrectable Sector Count: 0 sectors
>>>> ID199    UDMA CRC Error Rate: 0
>>>>
>>>>
>>>> GSmart Control 0.8.7 is reading the same thing, 178 sectors, but also
>>>> says it's OK.
>>>>
>>>> running an e2fsck from gparted reports 0 bad blocks.
>>>>
>>>> I've also retested in another machine with different cables to minimize
>>>> the possibility of bogus hardware or BIOS issues, but the results remain
>>>> the same.
>>>>
>>>> Seagate's website has a FAQ that says their tools should be the final
>>>> say as they're designed to work correctly with their drives.
>>>>
>>>> Normally a bad sector or two wouldn't bother me, I have drives that
>>>> have been running for years like that. I just keep backups fresh and check
>>>> for bad sector growth. A few bad sectors is within spec and that's why
>>>> HDD's have a reserved area. Yet somehow 178 sectors seems like a lot.
>>>>
>>>> Should I trust this drive for anything more than a paperweight?
>>>>
>>>> Should I trust anything with the words 'smart', 'affordable', or 'free'
>>>> in the name?  ;]
>>>>
>>>>
>>>> Thanks!
>>>>
>>>>
>>>> --Kenn
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