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 Post subject: Toshiba's G-List Module
PostPosted: January 22nd, 2019, 6:31 
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Joined: April 15th, 2008, 10:43
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What is Toshiba's G-List Module? :?:


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 Post subject: Re: Toshiba's G-List Module
PostPosted: January 22nd, 2019, 11:06 
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Location: Portugal
myspacetech wrote:
What is Toshiba's G-List Module? :?:


G-List is the list of re-located sectors. If a drive do find defects when in use it will replace those defective sectors by spares.

Translator, Defect Lists and Bad Sectors :

Understanding translator "shifts" :

Toshiba do store the majority of CPs on ROM as pieces of code that are after the MAIN ROM code but the main defect lists are still stored on the platter. For example the P-List is adressed by CP DD and is stored on platter. This can be retrieved by the same VSC (Vendor Specific Command) used to get the other ROM CPs.

The G-List is stored as a "G" Module on the platter. You can't get this module by the same Vendor Specific Command used to get the other CPs but it's still possible to retrieve and clear this list using other methods (VSCs).

Example for old IDE Toshibas :

http://www.hddoracle.com/viewtopic.php?f=59&t=1254

:D

On Toshiba a typical fault is damaged G-List. When the drive does attempt to place many defects on G-List for example because the drive was dropped and now have many bad sectors sometimes the drive do mess up and G-List turns out to have invalid entries messing up the "translator" and LBA access is lost.

It's very typical and on that case a drive will take some more moments to ID then usual and no LBA access is possible (or partial access is possible only). A Victoria/MHDD scan should show errors on all LBAs and those should be skippend very fast to the next one without re-attempts of reading.

Typical sollution is to use PC-3000 DE option to create a virtual translator to bypass the G-List issues. Lacking PC-3000 one can still have some "luck" by clearing the G-List of the drive ...

My firmware recovery service for Toshiba targets this type of cases mainly as they are the most commun (regarding Toshiba firmware damage) ...

https://www.ebay.com/itm/Toshiba-Hard-D ... 2925277623

Regards.

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 Post subject: Re: Toshiba's G-List Module
PostPosted: January 22nd, 2019, 23:18 
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Joined: December 1st, 2018, 0:18
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cool! thx for sharing.


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 Post subject: Re: Toshiba's G-List Module
PostPosted: January 23rd, 2019, 11:03 
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HDDscholar wrote:
cool! thx for sharing.


No problem !!!~

Also : - http://www.hddoracle.com/viewtopic.php?f=56&t=176

(might be of use to people starting @ data recovery)

:D

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