[smartmontools-support] Overflow 9

[Gabriele Pohl]

Hi kwadro,

On Sun, 17 Dec 2017 16:16:18 +0100
kwadronaut wrote:

> The 9 Power_On_Minutes is incorrect at a humming drive here; the drive
> is from 2004, last time I looked it had an online time of several years.
> Today I checked again:
> 
>   9 Power_On_Minutes        0x0032   163   163   000    Old_age   Always
>       -       852h+26m
> 
> 
> Device Model:     Maxtor 7Y250M0
> 
> After how many hours/years/... did I hit the 000000 again?

you have to ask the disk manufacturer for that
as their firmware sets the attributes values..

But smartctl will support you in doing some guesswork.

See man page section about "--vendorattribute=ID,FORMAT[:BYTEORDER][,NAME]"

With that option you can look at the raw value
in many different formats and interpretations.

e.g. 

Regular smartctl output for my disk here:

240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       17642h+59m+55.478s

A customized smarctl output:

# smartctl -A -v240,raw48 /dev/sda | grep Hours

240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       170084999906539

And if you use smartd you can let it store attributes raw values 
on a regular base in local file with our experimental feature 

"​--attributelog"

See here for further instructions:
https://www.smartmontools.org/wiki/TocDoc#RAWValues

Hope that helps and have fun on your diving excursion ~ :)

Gabriele
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