Hello. I have a WD40EFRX-68N32N0 (Apollo) drive with a dead 4th head; when attempting to disable the head via a drive command, it hangs in the BSY state for a long time. Alternatively, it reports "Module not in Dir???". If this refers to modules 04 and 05, they don't seem to exist on this drive at all. The question is: how can I disable it in this case?

The WD40EFRX is a Red series disk.

Can you post a screenshot from CrystalDiskInfo

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Orico DS500C3-US-BK 5-disk 3.5" SATA, iTGZ 4x M.2 2280 Thunderbolt enclosure NVMe/SATA, etc. etc.

Thank you for your reply. During the repair process, I already cleared the SMART data and hid the defects, so everything there has been cleaned up

Is the WD40EFRX functioning now or is that head component still troublesome

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Orico DS500C3-US-BK 5-disk 3.5" SATA, iTGZ 4x M.2 2280 Thunderbolt enclosure NVMe/SATA, etc. etc.

It is fully functional, except for the head that needs to be disabled)

You can disable it in the head map, but you're probably not interested in how to disable a head, but rather how to restore the hard drive by reducing its capacity, which includes disabling the damaged head.

If you simply disable the head in the head map, you'll be in for a surprise because the drive remembers who it is...

P.S. Before doing anything irreparable, create a backup restore point and be sure to back up the service area tracks - they'll come in handy when you have to restore the drive to its original state after experimenting.

ora

You're right, that is exactly what I mean. I want to disable it without using critical procedures like ARCO