Re: [smartmontools-support] Which attributes can estimate number of bad blocks?

[<ro...@sp...>]

I don't have enough experience with SAS drives to answer your question.

All I can tell you is while 1 or 2 bad sectors (hard errors, not medium)
don't mean it's a bad drive, every time a sector gets reallocated, the
[platter] drive gets more fragmented. You can't defrag this. That's one of
the reasons why when I hear complaints about a slow system or hard drive,
the first thing I check is the SMART attributes. I'd say in at least 50%
of the cases, it is indeed the hard drive going bad.

> Il 28 lug 2016 4:36 PM, <ro...@sp...> ha scritto:
>>
>> Current Pending Sector can indicate one of 3 things [on platter drives]:
>>
> CUT
>
>> As for trashing a drive, it varies depending on who you ask, but at 5+
>> (raw value) reallocated, I trash. At 8+ Pending, I trash.
>>
>> In regards to 187 and 197, I will retire a drive with any raw value more
>> than 0. But this is based more on Backblaze's published results than my
>> own observations. Usually I don't see those, or the drive is already
>> failing based on Reallocated and Pending.
>
> side question:  what about "Elements in grown defect list" with SAS
> drives?
> Will you trash when this values is different from 0?
> It should indicate the number of bad sectors, like "reallocated sector
> count" (smart #5) for SATA drives
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