Hello. I have two WD42PURZ drives with defects that need to be hidden; however, current software versions identify the family as "03C1 Unknown," so I assume the drive family is not supported by the programs I have. It fails to read the service area (error 4F10), including the defect lists. How can I resolve this issue? Thank you.

In windows 11 you can use CHKDSK

CHKDSK /R

will read every sector and map them out as errors are found

another more aggressive approach is to use Seatools 5 and use the erase disk function which will allow the disk to map out pending sector issues etc but be wary to clear off the disk first before using Seatools 5

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USB 3.5" enclosures are $19 USD postage paid from China, I own several

Enter you serial number here:

https://support-en.wd.com/app/warrantystatusweb

If the S/N is recognised, you will see the drive's family.

Example:

WX42D42ARZ35
WD42PURZ-85B4YY0
VENICERP
5040 <-- should be 5400 RPM
256M
SATA3 6GB/S
4.0T
4HD
SURVEILLANCE DISTRIBUTION

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A backup a day keeps DR away.

Thank you, fzabkar.
VENICERP 5040 256M SATA3 6GB/S 4.0T 4HD SURVEILLANCE DISTRIBUTION
VENICERP 5040 256M SATA3 6GB/S 4.0T 4HD SURVEILLANCE ROEM

Hi,
To work with this drive, you need an unlocked ROM, or an unlocked PCB.

Mikippp

Mikippp
I understand, thank you