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jngphoto

macrumors member
Original poster
I just purchased 4TB WD Red Plus HD to replace a 4TB WD Blue HD.

I’m using it on a HD dock. My Mac Studio 2 recognise it to be initialised but it failed to erase.

Is my HD DOA?
 
Try Disk Utilities. Select the drive, click the "Erase" button, and choose APFS and GUID. Should work.

Edit; I checked again, and it seems that the recommended format for HDD is Mac OS Extended (HFS+).
 
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You could use dd in the shell to write a few MBs worth of zeroes to the beginning of the drive. That helps if something got confused by the existing partitioning.
 
Now and then I try to erase a device (usually a USB flashdrive) with disk utility and it "fails".

The failure alert will usually say that it couldn't unmount the target device.

Then, I REPEAT the procedure, and now the drive unmounts and initializes properly.

OP:
Did you stop after "the first failure"?
If you did, try again.

Also... if a repeat or two doesn't change things, try this:
Erase it, but this time choose a Windows format (such as exFAT).

If the drive now seems to go through with the erasure properly, THEN try erasing it again, this time using a Mac format (either HFS+ or APFS).

If THAT doesn't work, try taking the drive to a Windows computer and see if it will erase there. If it does -- again -- bring it back to the Mac and try a Mac format erasure again.

A word about APFS v. HFS+ ...
Using APFS with a platter-based drive that is used for data (only) storage can result in excessive fragmentation and can cause "disk thrashing".

For that reason, only use APFS where you MUST USE APFS -- such as for a time machine backup. Otherwise, use the old-fashioned HFS+.
 
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