WD40NDZW– Head 05 Damaged, Need Help Disabling Head

[Josh256]

Hi everyone,

I have a WD40NDZW with PCB 810035. Head 05 and platter 05 on the patient drive appear to be damaged, while the other heads and platters seem OK.

My goal is to disable Head 05 so the drive can identify and allow recovery from the remaining heads.

I'm testing on a working donor first. I backed up the modules and then bent Head 05 on the donor so it wouldn’t touch the platter surface. After doing this the drive stopped identifying and I can no longer access RAM to disable the head, and loading an LDR also fails. The same behavior occurs with the patient drive.

How can I gain access to RAM in this situation? Also do I only need to disable Head 05 in RAM, or are other changes required?

Any advice would be appreciated.

Attachments

[WebClaw]

Solution starts with manipulation of ROM then using LDR.

[melvin]

Or there's a little way around if you're ok with loosing sectors from the whole platter. Change the damaged one to a good one from a donnor. Drive will start ok. Unless there's a problem with SA. Then create a head map in data extractor(or whatever it is called in MRT) and turn of the ones assigned to the new platter.