HGST HTS721010A9E630 Does not read user data from head 0

[mhp666]

I have a HGST HTS721010A9E630 It does not read a single sector of user data from head 0, but it synchronizes perfectly and is able to read the 2 copies of the SA without problems. It is ready immediately and does not make any strange noise.

Any ideas? Thank you.

[pepe]

most probably a weak head...

[melvin]

Or it's loosing translator.

[pepe]

not, if other heads read fine, which i find implied in the OP.

[mhp666]

Thanks for the info.
I'm going to change plate and heads and I will comment on the result.

[unknown]

I'm going to change plate and heads and I will comment on the result.

I would start with imaging with the working head/s first then do a head swap.
Why would you go for a platters swap?