Hello and Happy New Year friends!

I have a whole bunch of refurbished (arco/selfscan) WD Royl drives which are about to be sold to a reseller. The thing about all this is that the SMART attributes of the drives were zeroed after performing arco/selfcan tests. I don't want the reseller to sell them as brand-new drives so I decided to change the "Power-on-hours" and "Start/stop count" SMART attributes to their original values.

At first I wanted to write back the native 21-th modules and clear G+Relo list but this only worked for a very few drives. Clearing G+Relo affects RAW values of "Relocated sector count", "Relocated event count" and "Current pending sector" attributes but does nothing to "WORST" column and other attributes (such as "Raw read error rate" etc)

Eventually, I decided that the best option would be to find the offsets of the "Power-on-hours" and "Start/stop count" attributes in 21th module and change them to original values manually. So I compared 21th modules of the same drive before and after resseting the SMART data (recently-reseted 21-th VS same module copied after a few hours of being powered-on) in HEX editor but the difference was SO huge that I am at a loss.

How do I find the needed offsets? Gimme a clue guys.

I doubt anyone has ever taken the time to deconstruct S.M.A.R.T. modules in great detail. Beyond clearing/disabling it there isn't much benefit from a data recovery standpoint to figure this all out.

You're probably the first person to ever care about setting back those values.

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Data Medics - Hard Drive, SSD, and RAID Data Recovery Service Company

Extracting SMART data from WD MODs 20 - 26:
http://www.hddoracle.com/viewtopic.php?f=22&t=968

If my ugly source code is too hard to understand, let me know and I'll try to explain it.

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A backup a day keeps DR away.

Extracting SMART data from WD MODs 20 - 26:
http://www.hddoracle.com/viewtopic.php?f=22&t=968

If my ugly source code is too hard to understand, let me know and I'll try to explain it.

_________________
A backup a day keeps DR away.

Thank you friend for sharing your tool. There is no problems with running your awesome utility cause a long while ago you shared your wdromv11 tool with me and taught me how to run utilities like these. Just one question, does the "Flg" column indicate the offsets I am looking for? If it doesn't, how do I interpret those hex characters?

Can you upload module 0x21?

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A backup a day keeps DR away.

Sure

Which module do I have to edit, 22, 23,24, 25 or 26? And how do I find the needed offsets? Sorry if I sound retarded but I honestly have never done any reseach on SMART modules architecture

Here is the table of SMART attributes:


It's easier to make sense of it if you choose 12 bytes per line in your hex editor.

Each attribute record has the following format:

ID (1 byte)
Type (or flags, 1 byte)
Null byte ???
Current Normalised Value (1 byte)
Worst Normalised Value (1 byte)
Raw data (little-endian, 7 bytes)

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A backup a day keeps DR away.

Yeahhh I got it! Thank you guys for taking your time to guide me and help me learn! People like you both are the ones who make this forum a great pleace to be a part of!