LDR upload for WD30EZRX-00DC0B0

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Techbods
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LDR upload for WD30EZRX-00DC0B0

Postby Techbods » 20.05.13, 12:17

Hello, I am very new to hard drive recoveries, so my apologies for newbness.
I have a 3tb drive MDL: WD30EZRX-00DCD0B0 and have run utility, the utility has recommend an LDR upload. Where can I get the file required? (could you also give a brief explanation of what an LDR upload does, as I am complete beginner to recoveries?)


AJ2008
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Re: LDR upload for WD30EZRX-00DC0B0

Postby AJ2008 » 20.05.13, 15:10

A Loader is basically a method of loading good resources to patient RAM where native resources cant be loaded for some reason. With a loader you can often get access to the service area and all relevant SA modules/tracks.

But unfortunately in this case a loader will not help because drive restarts during loading of ROM modules. Maybe you can specify 'LDR already loaded' after loading, not sure.

The Loader you need has to be of the same revision as your model. The best way to tell the version you have is to look in the log for 'ROM Version' or 'Consolidated SA version' or similar.

One important thing, after status register show 'DRD' + 'DSC', are any other flags active? can you 'feel' it to check if the spindle stops after it reaches DRDY?


Techbods
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Re: LDR upload for WD30EZRX-00DC0B0

Postby Techbods » 20.05.13, 18:10

Thank you for your explanation :)
DRD and DSC stay green, sometimes ERR and ABR flash red when attempting to read. It feels like the spindle stops after reaching DRD.
Here is log after first utility start up.

Techno mode key
Techno mode key......................... : Ok

RAM:
HDD Info reading........................ : Ok
Heads number............................ : 6
Cyl Count............................... : 256


ROM:
ROM reading............................. : Ok
ROM Data size........................... : 256 Kb
ROM version............................. : 04.1BB
ROM generation.......................... : 04.1BB
Link table version...................... : 05.0V.
Consolidated ROM version................ : 0004001B

ROM Modules:
Flash ROM dir reading................... : Ok (Active)
Modules directory address............... : 89 656 (24)
SA regions address...................... : by default

SA Translator loading................... : Ok

Heads configuration..................... : by map
Heads number............................ : 6
Heads number in use..................... : 6
Switched off heads...................... : No
Heads map............................... : 0,1,2,3,4,5
ROM Firmware version.................... : 0004001B

Service area:
SA dir reading (ID)..................... : Drive is not ready
SA SPT Detect........................... : FAIL
SA dir reading (ABA/CHS)................ : Module 0001 reading error ABA 528440 reading error Physical read error C/H/S: -77/1/157 Device Error Detected: "VSCE KEY SECTOR MUST PRECEED DATA XFER REQUEST"
SA Access............................... : NONE

Configuration reading................... : Module 02 not found


AJ2008
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Re: LDR upload for WD30EZRX-00DC0B0

Postby AJ2008 » 21.05.13, 10:53

LDR you need is from fw version 0004001B , but you should check it again because if spindle stops and you see 'ERR' or 'ABR' then likely there is some physical problem


Techbods
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Re: LDR upload for WD30EZRX-00DC0B0

Postby Techbods » 22.05.13, 11:26

Would it be worth swapping out the PCB or does it sound more like an internal physical fault? Unfortunately our workshop does not posses a clean room so I do not want to attempt any internal repairs at the moment.


AJ2008
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Re: LDR upload for WD30EZRX-00DC0B0

Postby AJ2008 » 22.05.13, 12:13

I think swapping the PCB will make no change, but you can try it, its always a good diagnostic step to take.

Before you apply power, short circuit pins TV9 + TV10 on the PCB, check if its still powering after this. If the spindle stops, then I would assume internal problems.

For some models you can adjust head mapping in RAM to isolate a defective head/heads but for modern WD families its not always possible. At kernel mode you can select the option for head map edit, but apart from this theres not a lot more you can do without being able to check it internally first.


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