Data recovery and disk repair questions and discussions related to old-fashioned SATA, SAS, SCSI, IDE, MFM hard drives - any type of storage device that has moving parts
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Re: Fried Smooth L7251 controller, possibly fried board WD 7

November 17th, 2025, 15:27

Congratulations! Sorry, I have to ask, did you reinstall your drives in the correct order? Is it a RAID 0 or a JBOD?

Can you show us the Partitions tab for the combined drives in DMDE? Can you then install each drive in your computer and do the same for each?

https://dmde.com/

If DMDE doesn't detect any partitions, can you show us sector 0 of each drive, both inside and outside the enclosure? (I'm looking for hardware encryption.)

Re: Fried Smooth L7251 controller, possibly fried board WD 7

November 23rd, 2025, 6:41

Hi All and fzabkar,

To my understanding this is just a JBOD. From what i was reading, controller of the enclosure JM20336 is not supporting RAID and no encryption.

This is how the win disk manager identifies the enclosure after the hardware fix.
And the DMDE
Attachments
DMDE.JPG
win Disk management.JPG

Re: Fried Smooth L7251 controller, possibly fried board WD 7

November 23rd, 2025, 11:06

I suggest multiple USB enclosures and make redundant copies of data of interest

I use USB attached storage but I use server class disks which tend to be less likely to croak even with over 30,000 operating hours and growing


USB enclosures are inexpensive and such disks can be placed on bookshelves safe from most hazards.

2.5" disks have accumulated in vast numbers and this type of enclosure is available now with USB-C ports so its possible to use a USB-C hub and copy disks easily.

I use 7-zip and it supports TAR files are uncompressed. These are able to be copied to other disks for redundant backups.

I use PAR2 using a 64-bit console version but a free 32-bit QuickPar is fine for modest needs. PAR2 can make 5% or 10% recovery blocks. 7-zip 7z files can be carved into volumes such zip disk chunks which can be the basis for PAR2 recovery parts.

Re: Fried Smooth L7251 controller, possibly fried board WD 7

November 23rd, 2025, 12:20

The standard IDEMA capacity of a 1TB HDD is 1953525168 sectors. Your enclosure is reporting a capacity of 3907050336 sectors, which is exactly double. DMDE finds a copy (C) of the boot sector, but it doesn't find the boot sector (B) or a file system (F).

Were the drives reinstalled in the correct order?

Re: Fried Smooth L7251 controller, possibly fried board WD 7

November 25th, 2025, 4:30

Hello fzabkar,

Yes, drives were reinstalled in the correct order. I have marked them before the removal.

I used R-Studio in the end, and managed to recover almost all files from the drives.
R-Studio was not able to read some sectors during the scan, that suggest these drives got bad sectors during the power surge.
S.M.A.R.T also reported relocated sectors.
This can explain why MFT became corrupt.

I would like to say huge Thank you to you fzabkar and to the members of this forum.
I have seen a lot of your comments and very useful and helpful suggestions on different forums.

In my case DR was a success and i have never done this before. :please:
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