Afternoon all,

I am having a bad day with a problematic Western Digital!

The HDD in question has been to another DR company who say that they have only swapped the PCB for a similar model and done nothing else.
The drive appears to have an electronics problem as the drive is not spinning up, nothing gets warm and PC3000 cannot see it in safe mode although I cannot see any damage to PCB.
I tried an identical PCB and the drive spun up with constant head ticking that doesn't stop (four ticks > short pause > four ticks > short pause etc.)
I swapped FW to new board and it does exactly the same thing.
Looking at the heads, they are in perfect condition, (Head0 - 41ohm; Head1 - 39ohm, Head3 - 39ohm) and the pre amp is fine.
The platter surfaces have no physical damage although I have not tried looking for magnetic corruption.

I don't have a great deal of experience with these older WD's so any assistance is appreciated - all I ever get to work on are classic bad heads, seized bearings (Seagate 1.5TB last week! ) and head crashes!!

Let me know if you want more details.

Thanks,

Tim

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Timothy Ayers
Clean Room Engineer

http://www.palmerdata.com
Tel: +44 (0)20 7015 5380

what happens after hotswap?

I think I am having a Dejavu, I know exactly how you feel

You've got PM

Annoyingly the new drive won't accept standby command, using either PC3000 or our in house tool.

I have now tried a new set of heads and it still does the same thing, the heads just bang continually! The new heads are back into the new drive and are still working ok.

I could tell the customer that it's a classic case of WD head alignment - they are getting used to hearing that!

_________________
Timothy Ayers
Clean Room Engineer

http://www.palmerdata.com
Tel: +44 (0)20 7015 5380

I think its an alignment problem. Considered outsourcing to a company that can deal with that issue?

im think had missalignment , can u check if reach Servo ? i had similar case if u want

Contact me on MSN

He has not replaced heads till now, at least did not mention. So alignment problem can be sorted out.
I would vote for preamp damage, though it might seem fine.
An MHA replacement would help with preamp..., but obvously it would raise some other problems

pepe

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Adatmentés - Data recovery