W hich drives are the most difficult to recover from? At the moment the family of Seagate «Rosewood» Hard Drives
P.S.: Seagate drives of this family with a self-encrypting function (SED - self-encrypting drive) have not been delayed yet.
occupy a leading position in the number of "irretrievably lost" or simply irreparable. Simplification of the mobile line of hard drives touched not only this manufacturer, Western Digital also changed the “format” of its drives. But in terms of the number of clients who applied, with a diagnosis of “gash on level ground” (the drive was not subjected to physical impact), the advantage was towards the first.
List of Seagate Rosewood A5 and 8C Family Hard Drives
|ST2000LX001 (8C)||ST1000LM048 (A5)||ST500LM030 (A5)|
|ST2000LM007 (A5/8С)||ST1000LM035 (A5)||ST500LM032 (--, SED)|
|ST2000LM015 (A5)||ST1000LM037 (--)||ST1500LM012 (--)||ST500LM033 (--, SED FIPS 140-2)|
|ST2000LM009 (--)||ST1000LM038 (--, SED FIPS 140-2)||ST500LM034 (A5)|
|ST2000LM010 (--, SED FIPS 140-2)||ST1000LM049 (--)||ST1000LM050 (--, SED FIPS 140-2)||ST500LM035 (--, SED FIPS 140-2)||ST500LM036 (--, SED)|
P.S.: Seagate drives of this family with a self-encrypting function (SED - self-encrypting drive) have not been delayed yet.
Foreword to the main textThe warranty protects the consumer from marriage and the need to purchase a new device in case of failure (provided that it is used correctly), but will not protect against the loss of important information. And this is what every customer should think about before buying a drive.
The reason for the decrease in reliability of hard drives, in our opinion, is a change in the market climate (sales decline, cloud services and social network) and reorientation to a new product (ssd-drives can now be found in budget computers and laptops).
The main task of this article is to inform future customers about the difficulties that we will encounter when restoring data from disks of this family. And why opened «Rosewood» -this is a pre-losing option!
Example # 1 - An external hard drive is not detected after a crash.
A fter the fall, stopped being detected external hard drive Maxtor HX-M201TCB/GMR.The disk rotates freely, does not emit extraneous noise, knocks, squeaks.Defined as Seagate M3 Portable in the device manager, without the volume and the ability to control the drive through «Disk management».
- Inside the case, a hard drive of the Rosewood A5 family, Seagate ST2000LM007-1R8174 is installed, working through a USB adapter EXPANSION_ASM1153_2.5
- The hard drive gives a passport with zero volume. Thanks to the PC3000 toolkit, we get access to the drive’s service area for diagnostics. According to the test results, it was revealed that some of the modules: 2B, 50 - are damaged and require editing. The most important of them is the 2B - translator, it is responsible for the location of user data. Part of the data may still be in Media Cache (50), which complicates the procedure.
- To extract the information, we need to restore the 2B module manually or start the procedure to reinitialize the damaged module, with caution! Since translating the translator will inevitably lead to clearing Media Cache (module 50)! And this is already a chance - to permanently lose 90 Gb of user data. The restoration of the 2B module header was completed successfully (without recounting), which cannot be said about the 50 module. But we can analyze how many unloaded records are left in it! After reviewing the read module, it became clear that there are no records there (such cases, with each new case, become smaller, and therefore the chances of successful recovery of all data, without damage, too.) This set of circumstances unties our hands. Next, we turn off the function of using Media Cache and proceed to read the data.
Results #1:T he successful restoration of the drive initialization function still does not guarantee the successful recovery of information from it. So in this case: out of 4 heads we read 3 without errors. The task, within the agreed amount, has been completed without replacing the block of magnetic heads. Subtracted 42% of the information. This result is related to the specifics of writing data to the hard disk. Most of the video material is damaged. While the photos and documents almost all survived.
Example # 2 - A hard drive beeps after an impact.
T his time, the brand new Chinese laptop Voyo i7 became the victim of the case. On which fell a rack with electronic cigarettes. Since the laptop was on, there were no problems with the hard drive. Replacing the broken matrix in the service center, the owner encountered an unusual black screen with the inscription “Default Boot Device Missing or Boot Failed”. The hard drive was replaced with a new ssd-drive. After several unsuccessful attempts to open the failed disk, the client decided to contact us.
- Inside the laptop, a hard drive of the Rosewood A5 family was installed, Seagate ST1000LM048-2E7172
- As a result of the blow, the block of magnetic heads is stuck on the surface of the plates, which in fact is due to the uncharacteristic squeak issued by the hard drive. The head suspension on these models is extremely fragile. Very rarely, in such cases, the heads remain intact and are able to read further.
- First, we examine the state of the block of magnetic heads and suspension. Then inspect the surface of the plates. If the damage has not touched the service heads, you can continue the recovery procedure.
Results # 2:T he head suspension is not deformed, there are traces of polymer on one head, there are no traces of cuts. Hermozone and heads require cleaning (the client brought a disc with a torn sticker). After cleaning the hermozone and heads, we can collect the drive back. Next, edit the ROM and passport in RAM and then proceed to the proofreading of information. According to the results of the loss amounted to: 2768 broken out of 11372 files. You can improve the result by replacing the block of magnetic heads, but the customer was satisfied with the result.
Example # 3 - The hard drive does not start after a hit.
T he disk was badly deformed. A deep dent on the underside of the drive. The body is concave inward, possibly scratched (gash), as it fell during operation.
- The hard drive of the Rosewood A5 family, Seagate ST1000LM035-1RK172 was supposedly in the outer box.
- Despite a serious deformation of the case, the hard drive plate survived. Engine jammed. The block of magnetic heads in the parking zone, the sliders are deformed.
- First of all, it will be necessary to transfer the plate to the donor case and replace the block of magnetic heads. Then patch the ROM to work with the service area of the drive and start working with the user zone of the drive.
Results #3:U pon completion of the procedure for transferring the plate to a new building, we need to prepare the drive ROM for working with the service area. Reading service modules on the 1st head caused the drive to freeze. After editing the passport and disabling the Media Cache function, the drive stopped hanging and allowed access to the user zone. The necessary files were restored, the losses amounted to 10% - such a positive result is primarily associated with the location of the files on the hard disk and their size. Although the dent was on the bottom of the plate, most of the bad sectors were on the top, 1st head.
Example # 4 - An open hard drive
A fter a power surge, the ASUS Zen AiO all-in-one stopped running. Having a certain experience, the client decided to cope with the disease on his own. Having restored the working capacity of the monoblock, the owner proceeded to restore information - using youtube. The video described in detail the steps for successful recovery of the drive. But at the end of the procedure, a miracle did not happen. Therefore, the person was forced to go to the laboratory.
- The hard drive of the Rosewood A5 family, Seagate ST1000LM035-1RK172 from the Asus monoblock.
- The drive came open and without a top sticker. Fingerprints of traces and dust were found inside the containment. The head suspension is damaged, the heads stuck together in the parking area. Traces of “paste” from the edge of the plate. When washing the plate, small scratches from stuck heads and the path of how they were brought into the parking area were found. No visible gash was found.
- Complete flushing of the hermozone of the drive, installation of a new set of heads. Editing ROM and passport data with subsequent copying of service modules. Proofreading data.
Results #4:A fter flushing the hermozone, we proceed to install a new set of magnetic head unit. We correct the ROM and the passport in RAM, then reserve the service area. The drive does not freeze, we can proceed to the process of subtracting information. Results: out of 1836 files marked by the customer, 1193 survived (about 65%). The remaining files contain bad sectors, partially open or do not open at all. In this example, the customer hurt himself. Despite his experience, curiosity gained up. And, it seems, important information has become a toy.
Example # 5 - An external hard drive after a “friend”
T he external hard drive was disconnected at the time of copying data from the Macbook. Which led to sticking of the block of magnetic heads on the surface of the plates. Having found the wedging instructions on YouTube, the client decided to entrust this process to his friend who is engaged in the repair of mobile equipment. He, in turn, tried to help as best he could ... After the disc began to whistle, he was sent to us.
- Hard drive of the Rosewood 8C family, Seagate ST2000LM007-1R8174 from an external box LaCie Mobile Drive 2TB.
- The drive is opened, in a zip package. Pendant heads killed. Flushing of the hermozone is required. On examination, scratches were found.
- Complete flushing of the hermozone of the drive, installation of a new set of heads. Editing ROM and passport data with subsequent copying of service modules. Next, we try to drag still live data.
Results #5:U pon completion of all preparatory measures (flushing the hermozone, patch ROM, transfer of adaptives from the donor ROM), the drive was started, but it crashed during initialization. As it was found out, the problem was related to the surface on the 1st head. To gain access to user data, we disable the work with Media Cache, and in the passport work with defects. Next, we build a head map and try to restore the most “readable” sections from those that the customer chose. Results: Subtracted 367Gb of which beaten about 164Gb (about 45%). In file equivalent: 13254 of which 5486 are broken. Reading on the first head in some places resembled a sieve.
Example # 6 - A laptop hard drive after a little shake
T he drive was installed in a laptop DELL Inspiron 3780. After a little shake, he began to “freeze” when accessing folders on the hard drive. A day later, began to publish a strange squeak when loading a laptop. Then they immediately carried to the service.
- Internal hard drive of the Rosewood 8C family, Seagate ST2000LM007 from a DELL laptop.
- Since the client said in advance about unnatural sound during initialization, we begin the inspection of the drive in laminar box. After opening the hermozone, “strange sounds” develop into a not very pleasant picture. On both sides of the plates there is a cylindrical gash, to the base - can not be restored.
- These damages are critical. It is not possible to recover data.
Results #6:S uch a case is not rare, but rather begins to claim a regular occurrence. With similar consequences (gash), every third client comes with this model. And unlike this case, nothing precedes trouble. As usual, we do not exclude that the client may interpret events differently.
Example # 7 - Stopped being detected in the system
T he client said that he accidentally hit a colleague’s drive and it fell. After which it ceased to be recognized as a disk in the system. Only a nasty squeak. With such words, this drive entered the laboratory.
- The hard drive of the Rosewood A5 family, Seagate ST1000LM035-1RK172 from the external box. This drive, unlike its 1 terabyte colleagues, already has 3 heads and 2 plates! When like a regular 1TB rosewood 1 plate and 2 heads. This indicates that this is a 2TB crop.
- After opening the hermozone, we observe the consequences of the fall: 2 heads with suspension are torn off. 3rd slowed down. There are scratches on the plates. More likely, after installing a new block, scratches will begin to creep away.
- Cleaning the containment area and plates from debris and adhering heads. Installation of the donor block of heads. Prepare the ROM. Next, edit the passport and subtract the service modules. If everything goes well, proceed to the proofreading of the data.
Results #7:P assing the preparatory stages: cleaning the hermozone and plates, installing a new set of heads and fitting ROM (patch + donor head adaptations). We still have one unsolved problem - recording blocking. Until we figured out how a new set of donor heads took root, working with service area modules can lead to their damage. The PC3000 functionality and the ability to work with the RAM of the drive come to the rescue (in addition to this method, there is also a complete lock through the bootloader, but the focus did not go through with this drive).
After successful initialization, we edit the passport to then subtract all critical modules (defect lists, translator, media cache, etc.).
Subtracting the modules, we check the heads for recording (on non-critical modules). The first two have the ability to record, on the last - the disk freezes. We correct the passport directly in the service area and turn off the media cache. We go to the Data Extractor, build a head map (in case you have to exclude the zone for any head). Within a minute, it becomes clear that the gash started to grow on the 3rd head, reading is accompanied by freezes and knocks. In the future, we disable this head (by editing the head map in RAM). After re-flushing, we try to continue working with the user zone.
In addition, we had to coordinate directories and files with the customer (the customer had no idea what the disk owner needed). But in such cases, the file system can be severely damaged: part of the directories and files, or even entire sections, may not display correctly or disappear altogether. All this required the participation of the owner of the disk.
As soon as we got access to the external hard drive partition, it became clear that some of the folders were no longer in place. But fortunately, there was no important among them. Having marked the necessary files, the recovery process was started. But now, without the participation of the 3rd head and part of the planes at the intersection of which, the drive could again begin to “saw off”.
Results: Subtracted 29.4Gb from 85Gb or about 34%. In the end, the drive allowed to get ready only on the 2nd head (or 0th in the screenshot).
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