[smartmontools-support] same version under different distros has different output.

[Christian Franke]

Hello,

Sergey Ivanov wrote:
> Hello there.
>
> I wonder how smartmontools could return next two reports for the very 
> same device:
>

Please compare the full outputs.


> === START OF INFORMATION SECTION ===
> Device Model:     TS256GSSD360S
> ...
> Device is:        Not in smartctl database

In particular compare the above line and search for a "Model Family" line.


> ...
>
> 1) *Under Ubuntu 25.04:*
>
> smartctl -A /dev/sda
> *smartctl 7.4 2023-08-01 r5530 [x86_64-linux-6.14.0-15-generic] (local 
> build)*
> Copyright (C) 2002-23, Bruce Allen, Christian Franke, 
> www.smartmontools.org <http://www.smartmontools.org>
>
> Warning! Drive Identity Structure error: invalid SMART checksum.

Something unknown is wrong here (Firmware bug?)


> ...
> 160 Uncorrectable_Error_Cnt 0x0000   100   100   050  Old_age   
> Offline      -       0

Device is likely matched by database entry "Silicon Motion based SSDs" 
which should appear as "Model Family"


> ...
>
> 2) under
>
> DISTRIB_ID='OpenWrt'
> ...
>
> 160 Unknown_Attribute       0x0000   100   100   050  Old_age   
> Offline      -       0

Device not matched by any database entry.

Conclusion: Please update the drive database on OpenWrt.


> ...
> 242 Total_LBAs_Read         0x0000   100   100   050  Old_age   
> Offline      -       632542
> 245 Unknown_Attribute       0x0000   100   100   050  Old_age   
> Offline      -       1045112
>
> What data should I trust? I'm interest in calculating of TWB but i 
> don't know if is it
> Total_LBAs_Written or  Host_Writes_32MiB? Not sure what multiplicator 
> should be (32Mb or sector=512b)?

The latter may be more reliable but may even differ between firmware 
versions.

Please note that smartctl -a prints:
"The above only provides legacy SMART information - try 'smartctl -x' 
for more"

Use smartctl -x instead and check the values of "Device Statistics" if 
supported because it is vendor independent and does not rely on drive 
database.

-- 
Regards,
Christian