技術不會停滯不前。每年都有越來越多的新功能出現(xiàn)在各種硬盤中。而且它們也都一樣。讓我們來討論一下SSHD——數(shù)據(jù)恢復分支中最受歡迎的設備。
Technology does not stand still. More and more new drives of all types with new features appear every year. And they all do break just as well. Let’s talk about SSHD – the most popular device in data recovery branch.

SSHD到底是什么驅動的，他們是怎么工作的?
What exactly is SSHD drives and how do you work with them?

歡迎來到這篇文章。
Welcome to this article.

SSHD驅動器是在PCB上具有NAND芯片（SLC-第一代SSHD驅動器或MLC-現(xiàn)代SSHD驅動器）的通用HDD驅動器。該NAND芯片用于快速啟動和安裝驅動器，并且包含最常尋址的數(shù)據(jù)（如微程序信息，轉換器，SMART，OS結構和分區(qū)表）。該數(shù)據(jù)的確切列表因制造商或型號而異
SSHD drives are general HDD drives with NAND chip (SLC – first generation SSHD drives or MLC – modern SSHD drives) on the PCB. This NAND chip is used for fast booting and mounting of the drive and contains the most often addressed data (like a microprogram info, translator, SMART, OS structures and partition tables). The exact list of this data differs from one manufacturer or model to another

截至今天，SSHD驅動器由西部數(shù)據(jù)，希捷和東芝品牌生產(chǎn)的。
As of today, SSHD drives are presented by Western Digital, Seagate and Toshiba brands.

大約5年前Seagate公司?開始制造具有媒體緩存區(qū)域的驅動器。這個區(qū)域與我們現(xiàn)代的SSHD驅動器非常相似。
Approximately 5 years ago Seagate corp. started to manufacture drives with Media cache area. This Area is very much the same to our modern SSHD drives.

特殊區(qū)域（媒體緩存）位于拼盤邊緣（讀/寫速度最高）。它存儲最經(jīng)常尋址的數(shù)據(jù)（文件系統(tǒng)結構，操作系統(tǒng)重要文件等）。媒體緩存位于表面，為了恢復數(shù)據(jù)，使用媒體緩存問題，通常只需要清理它（它是346 系統(tǒng)文件）。
Special area (Media cache) is located on the platter’s edge (where the reading/writing speed is the highest). It stores a most often addressed data (File system structures, OS important files, etc.). The media cache is located on the surface, and for recovering cases, with Media cache issues it’s usually enough just to clean it up (it’s 346 sys file).

注意，現(xiàn)代家庭驅動器(像Rosewood)可以有一些獨特的數(shù)據(jù)，比如MFT表，在媒體緩存中，而不是在一般的用戶區(qū)域空間。因此，在進行這些操作的時候，每次清理之前，都要備份346個系統(tǒng)文件。

Note that modern family drives (like Rosewood) can have some unique data, like MFT tables, in Media cache, not in a general user area space. So, when working on them, make a backup of 346 sys files each time before cleaning attempt.

SSHD驅動器是最復雜的存儲設備，需要復雜的方法來解決可能出現(xiàn)的問題。
SSHD drives are the most complex of the storage devices and require sophisticated methods for solving the issues that may arise.

混合驅動技術在這兩種技術中都有各自的優(yōu)缺點(SSD和HDD)。首先，我們對移動部件(頭部、主軸、表面)有一個基本的問題，其次是與服務區(qū)域模塊和翻譯相關的問題，最后，還有與NAND芯片相關的問題(內(nèi)存單元損耗，數(shù)據(jù)中的ECC錯誤，溫度問題等)。
Hybrid drives technology has pros and cons inherent in both technologies separately (SSD and HDD). Firstly we have a basic problem with moving parts (heads, spindle, surface), the secondary problems are related to the ?Service area modules and Translation, and finally, there are issues related to NAND chip (memory cells wear off, ECC errors in data, temperature issues, etc..).

我們將NAND芯片部分與通用HDD分開。因此，我們得到基本的硬盤驅動器問題，類似于一般希捷驅動器和NAND問題。
Let’s separate the NAND-chip part from the general HDD. As a result, we get basic HDD problems, similar to those of the general Seagate drives, and NAND problems.

例如，這里是Kahuna家族驅動PCB的照片：
For example here is a photo of Kahuna family drive PCB:

有很多關于如何修復通用希捷硬盤的文章。但是NAND芯片呢？
There are a lot of articles on how to work with general Seagate HDD (like a?damaged sys files,?ticks in 93 sys file?and?translator issues). But what about NAND chip?

上電后，我們還有終端報告。它可以幫助我們識別一個問題，但終端訪問被鎖定，因此我們無法通過終端發(fā)送命令。
We still have a terminal report after Power ON. It can help us to recognize a problem, but terminal access is locked as result we can’t send command via Terminal.

首先需要以某種方式獲得終端訪問。
Firstly need somehow get a terminal access.

為此，我們需要阻止驅動器初始化過程，實際上我們需要修改一個ROM芯片。所以通過引導代碼模式讀取ROM芯片：
For this we need to block drive initialization process, actually we need to modify a ROM chip. So read a ROM chip by Boot Code mode:

保存到備份配置文件夾（這非常重要?。?br /> Save it into backup profile folder (It’s very important!)?

然后使用實用程序窗口右側的“Kahuna補丁”選項（第1和第2步），并將該ROM寫入ROM芯片（步驟3）：
Then use a?“Kahuna patch”?option from the right side of the utility window (1st and 2nd steps) and write this ROM into the ROM chip (step 3):

等待一段時間，并在日志選項卡中檢查狀態(tài)：
Wait a while for the writing to proceed, and check the status in the Log tab:

當過程完成后重新啟動驅動器…
When the process is completed repower the drive…

…并嘗試通過按ctrl + Z?獲得終端訪問：
…and try to get a Terminal access by pressing?ctrl+Z:

您可以看到終端模式現(xiàn)在可用，并準備好接收和執(zhí)行命令。請注意，驅動器未完全初始化，在寄存器中可以看到不同的LED?，F(xiàn)在不要注意這些LED。驅動器不能通過ATA使用，我們只能使用終端模式，但是我們可以使用通用硬盤進行任何診斷：比如通過Ctrl + X命令檢查系統(tǒng)文件，對重要的系統(tǒng)文件進行手動備份（28,35,93 ，1B，135等），重新生成一個翻譯器（如果需要的話），刪除93系統(tǒng)文件（SMP標志）等。
As you can see the Terminal mode is now available and ready to receive and execute your commands. Note that the drive is not fully initialized, and in registers you can see a different LEDs. Don’t pay attention to these LEDs for now. Drive is not available via ATA, and we have only a terminal mode, but we can perform any diagnostics with general HDD: like?check a system files by Ctrl+X command, make a manual backup of important system files (28, 35, 93, 1B, 135 etc), regenerate a Translator (if needed!),?remove a ticks in 93 sys file (SMP flags)?and other.

在進行備份您要修改的系統(tǒng)文件之前！
Before proceeding make a backup of the system file that you are going to modify!?

對于每種情況，建議刪除93系統(tǒng)文件（SMP標志）：
For every case it is advisable to remove ticks in 93 sys file (SMP flags):

執(zhí)行完全診斷后，您需要重新初始化NAND芯片來實現(xiàn)（刷新）數(shù)據(jù)。此操作需要一個特殊的終端命令：
After performing full diagnosis you need to reinitialize a NAND chip to actualize (refresh) the data. This operation requires a special terminal command:

終端報告可以是短或非常長。這不重要，只是等到你得到終端響應。
The terminal report can be either short or very long. It’s not important, just wait until you get a Terminal response.

如果您得到以下終端報告：
If you get the following terminal report:

這意味著驅動器與NAND芯片有硬件問題。您需要使用故障盤ROM芯片設置備件盤的PCB，然后再次發(fā)送NAND初始化命令。
It means the drive has a hardware problem with NAND chip. You need to set a donor PCB with the patient ROM chip then send a NAND initialization command again.

完成NAND重新初始化后，您需要回寫原始的ROM轉儲（您沒有忘記備份，不是吧？）。從備份配置文件文件夾打開此ROM.bin文件：
After completing NAND reinitialization you need to write back the original ROM dump (that you did not forget to backup, didn’t you?). Open this ROM.bin file from backup profile folder:

..并通過啟動代碼模式寫：
…and write it by Boot code mode:

終端報告成功時等待：
Wait while the terminal reports of success:

…并重新啟動驅動器。重新讀取驅動器ID并檢查用戶區(qū)域訪問：
…and repower the drive. Re-read Drive ID and check the user area access:

因此，您可以訪問用戶區(qū)域，現(xiàn)在可以讀取所有用戶數(shù)據(jù)。
As a result, you get an access to the user area and can now read all user data.

轉載請注明：成都千喜數(shù)據(jù)恢復中心 » 使用PC-3000 SSHD混合硬盤NAND芯片故障數(shù)據(jù)恢復方案