The method can be used to recover original ROM image and then write it into donor PCB when original PCB was damaged, lost, or original ROM was lost.
當原始電路板或原始 ROM 損壞的情況下用這個方法可以用于恢復(fù)原始的 ROM 以及把原始 ROM 寫到供體電路板上，從而實現(xiàn)數(shù)據(jù)訪問

The idea is to rewrite the compatible donor ROM image to donor PCB and then recover the unique original ROM modules from SA modules and write them to the PCB.
思路是重寫一個匹配的 ROM 映像到供體電路板然后從服務(wù)區(qū)模塊恢復(fù)原始 rom 模塊并把 rom 模塊寫到電路板中

The procedure is applicable to almost all WD Marvell architecture drives with external (U12 IC is present on PCB) ROM, that has SA modules 35 and 109.
這個方法適用于幾乎所有 有外置 rom（U12）并且服務(wù)區(qū)模塊包含 35 和 109 的西數(shù)硬盤

This procedure is not applicable to drives with internal ROM IC (U12 is not present) as well as to classical WD Caviar architecture drives(non-Marvell).
這個方法對于 rom 集成到主控芯片的西數(shù)硬盤以及傳統(tǒng)的 WD Caviar 硬盤不支持

To perform the procedure the SA and at least one system head should be OK.
為了執(zhí)行整個流程 服務(wù)區(qū)和至少一個系統(tǒng)磁頭要是好的

The modules 35 and 109 are necessary to perform the procedure.
模塊 35 和 109 對于整個過程是必須的

In this example we recover WD20EACS-11BHUB0
本例當中我們恢復(fù) WD20EACS-11BHUB0(Sadle G6 family)

(Sadle G6 family) drive with not original (donor) PCB. The drive goes READY but doesn’t have access to User Area and to Service Area
WD20EACS-11BHUB0（Sadle G6 家族）驅(qū)動器沒有原始的（donor）PCB。該驅(qū)動器已準備好，但沒有訪問用戶區(qū)和服務(wù)區(qū)

The donor PCB is similar to the original one(has the same number 2061-771698)
找到印刷電路板PCB類似于原來的（具有相同編號的2061-771698）

Here is the procedure:
程序部分：

Please pay special attention that the procedure is only applicable to the drives with external ROM (U12 ROM IC should be present on PCB).
請?zhí)貏e注意該程序只適用于驅(qū)動外部ROM芯片（PCB上帶有U12 ROM芯片）。

Let’s power up the drive and wait until it’s ready.
讓啟動程序，打開電源，直到硬盤準備就緒。

The spindle motor should spin now.
現(xiàn)在的主軸電機應(yīng)該在旋轉(zhuǎn)。

If the motor doesn’t start spinning and drive doesn’t get to ready (always in BSY or ERR) that means the ROM version is completely not compatible or it’s something wrong with PCB.
如果電機不啟動旋轉(zhuǎn)，硬盤不就緒（總是在BSY或ERR）這意味著ROM版本完全不兼容或PCB是有損壞的。

You can try to write different ROM via Boot ROM mode or try another PCB
你可以試著用ROM引導(dǎo)模式（Boot ROM mode）或嘗試另一個電路板來寫入不同的ROM。

When the drive is ready we can start the WD Marvell utility.
當驅(qū)動器準備好我們就開始WD Marvell utility。

As we can see the HDD ID is not full now.
我們可以看到硬盤ID現(xiàn)在是不完整的。

Just the drive model is present(it is loaded from ROM).
僅僅是驅(qū)動模式（它是從ROM加載）。

Service Area modules are not available at the moment.
服務(wù)區(qū)模塊現(xiàn)在不可以訪問

Press “Autodetect” button to detect family
點“自動發(fā)現(xiàn)”去發(fā)現(xiàn)家族

Check that the drive family is detected correctly.
檢查硬盤的家族是否正確。

Switch the utility to NORMAL mode and press Utility Start.
將模式轉(zhuǎn)換為NORMAL正常模式，然后按Utility Start啟動。

Press Detect SA SPT button.

The value must change from 500 (utility default) to the real value(for example 1980 for this drive family).
這個值必須改變從 500（默認值） 變?yōu)橐粋€真實值 （比如說 這個硬盤的值為 1980）
If it is detected that means heads can read servo markers.
如果這個值發(fā)現(xiàn)成功說明磁頭可以讀取
If it is not (as in this case) – we need to find a compatible FW version for ROM.
如果沒有發(fā)現(xiàn)，我們需要去找另一個固件版本匹配的 rom
Press OK to continue the utility initialization.
點 ok 繼續(xù)實用程序初始化
Service Area is not readable now.
服務(wù)區(qū)域現(xiàn)在不可讀取

So we can conclude that the ROM FW version in the PCB is not compatible with SA structure on the surface
We can try to write another image into ROM from the same family drive.
To do that we press “Work with ROM” button and select “Write ROM” option.

We will take the image from PC-3000 DataBase

We don’t know the necessary compatible FW version so we can check them one by one

When the writing process is completed

we need to restart the drive

Wait untill it is ready

Then we right click on the HDD ID field and select Refresh HDD ID

As we can see the model changed but the HDD is still not full

Then we can try to detect SA SPT again.
This option is available in the Utility Status window.

We still can’t detect SA SPT.

So we can conclude that the ROM FW version is not compatible again.
So we need to check another one.
Let’s write another ROM image from the DB.

We pick another donor ROM

Wait till the process is finished.

Then again repower the drive

When it is ready we check the HDD ID and the SA SPT again.

And no luck again

SA SPT can’t be detected.
The FW version is not compatible again.
So we go an write another one for checking.

Wait till the process is finished

Then again repower the drive again

When the drive is ready check the HDD ID

Now the drive is initialized with full ID!

Let’s try to detect SA SPT

Detected!

Now we need to restart the utility to initialize it with all the parameters of the drive

Press “Autodetect” button

And check that family is correct and mode is set to Normal.

Start the utility

Pay attention to the headmap. it must be the same as on your patient drive.

The full HDD ID is present

And the Service Area is available by two copies

So now we can recover the original ROM module 47 – SA adaptives

The module is recovered from SA now and we can write it into ROM

We navigate to the HDD profile folder and select the module and confirm by pressing OK

Wait until module is written successfully

We need to repower the drive to reload the new module

When the drive is ready we can go the next step – SA translator regeneration

We will use the SA module 35 right from the surface

The process is successfully finished!

Now we can repower the drive again to reload te new modules and check the user area access

When the drive is ready we can use Sector edit tool to check User area access

And still no access to User area!

Let’s test heads

We need to check all heads and press OK

We can see writing problems by Head 5

Now we know that the Head 5 has writing problems and we can skip it

The test is finished. As we can see from the results all the heads passed it excep Head 5

So we can edit headmap in RAM to bypass it

We just replace it with good head 6

And press Soft Reset button to apply changes

And now let’s try to read user sectors again

The data is available!!!

轉(zhuǎn)載請注明：成都千喜數(shù)據(jù)恢復(fù)中心 » 使用PC-3000如何從有外置ROM的西數(shù)硬盤怎么從服務(wù)區(qū)重建ROM并恢復(fù)數(shù)據(jù)