You can view the DFL case studies and FAQs here so that you can understand how to use the DFL data recovery tools better

This is one patient HDD firmware repair and data recovery case study from one DFL user in Indonesia.
Patient HDD ID: Seagate ST9500325AS Wyatt 3C
Symptom: Capacity 0 with the following com terminal error messages:

‘Rst 0x08M
RW cmd 0002 req = 89 3E 00 00 17 02 00 00 00 00 00 00 08 8C 08 00 87 97 09 00 08 8C 08 00
opts = 00001121
RW Err = C4090082
RW cmd 0002 req = 89 3E 00 00 01 00 00 00 00 00 00 00 08 8C 08 00 87 97 09 00 08 8C 08 00
opts = 00001121
RW Err = C4090082
RW cmd 0002 req = 75 5F 02 00 17 02 00 00 00 00 00 00 08 8C 08 00 87 97 09 00 08 8C 08 00
opts = 00001121
RW Err = C4090082
RW cmd 0002 req = 75 5F 02 00 01 00 00 00 00 00 00 00 08 8C 08 00 87 97 09 00 08 8C 08 00
opts = 00001121’

To fix the capacity 0 and RW Err, users need to backup rom and firmware modules and sys files and next the engineer got partial sector access issue.

To fix the partial sector access issue for this patient hdd, users need to use the partial sector access auto fix solution, just one click to fix by DFL Seagate hdd repair tool.

Finally the data area was fully accessed by DFL-DDP data recovery equipment.

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Dolphin Data Lab has both USB to SATA adapter and SATA to USB adapters and some users want to learn about the difference between these two adapters.

USB to SATA adapter

HDD USB-SATA Adapter Pro. is one very helpful adapter connecting both 2.5″ and 3.5″ SATA hard drives to your computer by one USB3.0 cable to an available USB 3.0 port on your desktop or laptop.

With this adapter, you can use the SATA drives as the portable drives, very convenient to use.

Users can connect SATA drives to DFL-URE or DFL-URE plus data recovery equipment and then users can image the sata drives or extract the lost data from SATA drives.

Universal SATA-USB Adapter Pro.

Universal SATA-USB Adapter Pro. is specially designed to work with DFL-SRP data recovery hardware or DFL-PCIe data recovery express or similar data recovery hardware tools to connect USB devices for disk imaging or file extraction. These data recovery hardware tools have SATA/IDE ports but don’t have USB ports.

With this adapter, users can easily connect external hard drives, USB flash drives, With Universal SATA-USB Adapter Pro. and NVME to USB adapter, DFL-SRP or DFL-PCIe or other similar data recovery hardware tools are able to image or extract lost data from NVME SSDs too.

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Dolphin team have recently received many requests from existing Dolphin DFL users to expand their data recovery business to offer physical hard drive data recovery services.

When the hard drives are physically damaged, such as stuck motor, head stiction, heads’ physical damage, platter scratches, weak heads or downgraded platter surfaces(many physical bad sectors), contaminated heads or surfaces, etc, when the patient drives have any failures above, the cases cannot be fixed online by remote support and users must have hands-on experience to open the patient drives in clean room environment to swap heads, swap platters, clean surfaces, clean hdd inner areas, adjust platter alignment, etc.

The following are the best physical hard drive head replacement tools for your clean room data recovery success:

01: Dolphin Head and Platter Swap and Clean Suite.Pro;
02: Hard Drive Ramp Toolkit Pro.;
03: Dolphin Scratched Head Comb Suite 001;
04: HDD Platter Swap and Clean Workstation Smart;
05: Seagate LM Slim HDD Head Comb Suite.Advanced;
06: WD Slim HDD Head Comb Suite.Advanced;
07: WD Slim HDD Motor Release Smart;
08: Seagate Head Comb For 7200.11 and 7200.12;
09: Donor Hard Drive Sourcing Book For Head Swap

Many Dolphin users have some of above head replacement tools, users can check to have one complete set and for new users, please email to or add Dolphin Skype ID: to get the best quote.

Dolphin team are able to help all Dolphin users on their SQL Server database recovery and repair cases. When users get cases they cannot handle, users can use Dolphin team as your last chance of data recovery success of all SQL server recovery and repair cases.

How to recover lost MDF/NDF databases?

Users can use database fragmented file reorganizing and rebuilding software to scan the partitions to get all possible fragmented database files and then reorganize and rebuild all the fragmented files into completed good files.

How to repair SQL Server Databases?

SQL Server Failure types:
SQL Server database suspect, virus attack, failed to attach the database, log file lost/corrupted, table data loss of DROP, DELETE, TRUNCATE, UPDATA, etc, recovered databases cannot be attached due to hdd bad sectors or other hdd failures, latch page read failure, redundancy error during database copy, system table corruption, index/page broken, etc.

For SQL Server database repair, users can try Dolphin DR Assistant Pro. to repair but please note: Dolphin DR Assistant Pro. is mainly for repairing corrupted databases caused by bad sectors or scratched surfaces.

To repair above failures, users need to use some sql server repair tool and need to have some good experience too. Some cases require manual analysis and whenever users cannot fix the cases by the database repair tools, users can email to or add Dolphin Skype ID: for free quote.

With DFL New Seagate HDD firmware repair tool, users can easily unlock the Seagate B2 HDD firmware area, fix the LED 0X000000BD spin up and down and other firmware corruption issue, fix the B2 undetected/wrongly detected issue, fix the inaccessible data area issue, etc.

The common Seagate B2 HDD models are as below:


After connecting the patient B2 HDD to the firmware repair hardware, power on the hdd, users get the repeating LED 0X000000BD COM terminal messages and the patient hdd spin up and down and up and down…

Whenever users get the Seagate B2 patient HDDs, please backup the original ROM, generate unlock rom, write unlock rom, backup important sys files. But if LED has appeared in the COM terminal, users need to backup the original ROM and then generate new ROM for LED repair within the new DFL Seagate hdd repair and then write the new LED repair ROM, next power off and on, the LED issue will be fixed and users can go to DFL-DDP data recovery software and all lost data can be listed for recovery.

If the patient B2 drives have suffered data corruption, users can see hex data but the data is not normally accessed. At this time, users need to use the new B2 Data Repair function and then the data corruption will be automatically repaired and DFL-DDP will list all the partitions and folders properly.

Video case study below:

SEAGATE ST4000VM004 ST4000VX005 B2 HDD LED 0X0BD SPIN UP AND DOWN HDD Repair and Data Recovery Steps

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WD SMR 2060-810035 Spyglass II HDDs have both MCU lock and SED lock. To repair firmware corruption and recover lost data, users need to fix the MCU lock first: swap with special 2060-810035 firmware unlock PCB or writing unlock rom to bypass the MCU lock by DFL-WD hdd repair tool.

Please note: not all 810035 PCBs support MCU lock bypass by unlock ROM.

Most common HDD failures for WD SMR 2060-810035 Spyglass II HDDs:

The data area is not accessed;
The data area is full of 0000;
The drive is undetected due to 190 corruption;
Physical head damage.

Most common functions and solutions used in repairing and recovering WD SMR hard drives:

Read/write ROM by HDD ROM Chip Pin Reader;
Generate unlock ROM by DFL WD hdd repair tool;
Sort nodes within module 190 by LBA/tree;
Scan missing nodes;
Delete overlapped nodes/wrong nodes;
Repair wrong nodes, etc.

Users can save all the modification to one new module 190 and then users can write the new module 190 or load the module 190 or T2data to RAM by DFL-DDP data recovery equipment for immediate data recovery.

WD SMR 2060-810035 Spyglass II HDD Common PCB number and Models:

PCB number: 2060-810035-000 REV P0


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Dolphin team has released new DFL-WD hdd repair software and new DFL-ST HDD repair software and users can download these new software from Dolphin user-only forum. With the new DFL-WD hdd repair software, users can further enhance the WD SMR HDD data recovery success rate.

With the new software, users can unlock more WD SMR HDDs by the original PCB without using special firmware unlock PCB, 800041, 800066, 800077, 800069, 810011, 810035, etc.

With the new software, users can fix more WD SMR hdd format cases, more all-sector-0000 cases, inaccessible data area cases, etc.

Users can download the latest WD hdd repair software from the forum.

More WD SMR HDD repair and recovery cases and tips below:


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With Dolphin DR Assistant Pro., it’s easy to repair corrupted SQL server databases at high success rate if the database corruption is caused by bad sectors or incomplete disk image from faulty drives with damaged heads or surfaces.

SQL Server Database Repair and Test Tips:

01: Users need to install the Microsoft SQL Server Management Studio;
02: Users cannot edit the database name, otherwise cannot repair the database;
03: Users need to have the database log file to attach and test the database;
04: Users need to learn about the database check command ‘DBCC CHECKDB(‘database name’)’.

SQL Server Database Repair Steps:

01: Open Dolphin DR Assistant Pro software;
02: Click ‘Repair DB’ module;
03: Select corrupted database path;
04: Select repaired database path, please note: the repaired database name need to be the same with the original database name, users can save the repaired database to a different path;
05: Add old database backup file;
06: Click ‘Ok’ and the software will repair the database automatically.

How to Repair and Test SQL Server Corrupted Databases

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With DFL Seagate HDD firmware repair tool, users can easily fix the Seagate firmware corruption and get lost data from Seagate undetected or wrongly detected hard drives. The following is one successful data recovery case study from one DFL user in Indonesia.

The patient HDD was detected with capacity 0 and it’s not possible to access the data area.

Model : ST4000DM004-2CV104
Serial : ZFN1DWGH
Firmware : 0001
Capacity : 7814037168 (3726.02GB)
Sector size : 4096
Heads number : 4

FW info : Obtained
FW version : V0A84C279.DPC7.AF0055.0001
FW package P/N :
FW ID : 00352241
FW creation date : 2017/09/20
FW creation time : 02:50:11
CFW version : V0A84C279.DPC7.AF0055.01326721.0
SFW1 version : 0352241.0001

Modules list : Obtained
Modules number : 57

F3 T>^l
V11 CheopsLiteA SATA 2.0 RAP30.6.2 SMR 2MB Flash 250 zn zonedse
Product FamilyId: 9B, MemberId: 01
HDA SN: ZFN1DWGH, RPM: 5426, Wedges: 240, Heads: 4, OrigHeads: 4, ActiveHdMap: 000F, Lbas: 00003ADABD42, PreampType: 82 10
Bits/Symbol: C, Symbols/UserSector: CB6, Symbols/SystemSector: CB5
PCBA SN: 0000M8367P7K, Controller: CHEOPSLITE_1_0_SATA(1410), Channel: Unknown, PowerAsic: Unknown Rev 00, BufferBytes: 10000000
SF ID: EF 60, SF Part Size: 800, Flash Used: 800
Package Version: V0A84C279.DPC7.AF0055.0001 , Package P/N: ———, Package Global ID: 00352241,
Package Build Date: 09/20/2017, Package Build Time: 02:50:11, Package CFW Version: V0A84C279.DPC7.AF0055.01326721.00352241.0001 ,
Package SFW1 Version: 7924, Package SFW2 Version: —-, Package SFW3 Version: —-, Package SFW4 Version: —-
Controller FW Rev: 09200250, CustomerRel: 0001, Changelist: 01326721, ProdType: V0A84C2.DPC7QC, Date: 09/20/2017, Time: 025011, UserId: 00352241
Servo FW Rev: 7924
TCG IV Version: 30.05
Package BPN: 6300
RAP FW Implementation Key: 1E, Format Rev: 0206, Contents Rev: 1F 80 02 00
Active BFW Container: 0
4K Sys Area: 1
– IOEDC enabled
– IOECC enabled
– DERP enabled v.
– LTTC-UDR2 disabled
– SuperParity 4.1 enabled
– Humidity Sensor disabled
– Media Cache Partition enabled
– Media Cache enabled
– Low Current Spin Up Normal
– Ready Sequence Optimization enabled
– Torn Write Protection enabled
– SubRelease:0
– Critical Event Log v. 1
– FAFH 40.11 disabled
– EWP:0
– DRAM Mirror:0

The Dolphin engineer helped to access the F3 T> and then backup the important SYS files/firmware modules.

Next the engineer cleared g-list, smart and regenerated translator. The engineer has checked the NGlist entries before and after the translator regeneration to make sure the translator regeneration generates positive result.

Next the engineer fixed the media cache issue.

Next the engineer opened the DFL-DDP data recovery equipment and set up one file extraction project, all lost data was perfectly recovered.


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This is one very interesting CCTV DVR format video data recovery case study for one DFL user from India. This case was given to other data recovery companies with other CCTV DVR data recovery software but failed.

With any other CCTV DVR data recovery software tools, the users can only get videos of only 2MB or the videos are in a mess with different cameras in one video, so no effective videos at all.

This kind of failure is usually caused by the original dvr device format and about 500mb data in the beginning of the dvr drive is lost and therefore, users cannot find any effective/valid videos.

When this case was given to Dolphin user with Dolphin DVR Pro, the user applied for one remote support by Dolphin remote data recovery system. Dolphin engineer helped the user to find the starting address of the data area by Dolphin DVR Pro. and then started the video analysis in fast analysis mode and finally all cameras and videos were found and listed properly.

Users can select the cameras and videos to save. and in the coming new Dolphin CCTV DVR data recovery software, Dolphin DVR Pro. can search the data address automatically when it is lost and then it is more convenient.

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