I haven't had any issues with Rosewoods until this particular case either. It just acts like none of the heads are compatible with it. What did you "check" with the donor heads to find a good one? Care to expound?

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Data Medics - Hard Drive, SSD, and RAID Data Recovery Service Company

Probably just a lot of trial an error for such cases.

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Luke
RAID Data Recovery

I tried several donor heads on probblem drive and found compatible heads for drive. I believe some drives are getting heads which is close to limits in which drive could work, so when something happened with original heads it is hard to find working heads for those drives.

Well,
Its Simple man ,Some of the head match the adaptives of a particular patient better the the rest thats it ,Its nothing to do with preamp and matching this and that like some of the boys here are saying ,This was rare now its getting worse and worse

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Regards
Amarbir S Dhillon , Chandigarh Data Recovery Labs
Logical,Semi Physical And Physical Data Recovery
Website-> http://www.chandigarhdatarecovery.com