Seagate 7200.11 ST3500320AS problem after head swap

[arvika]

Hello friends,

I have Seagate 7200.11 ST3500320AS with broken heads. It looks like simple case.
I swapped heads to new one from compatibility drive (I think it is compatible ) I can read data from H1 and H2 without ANY problem. From H0 and H3 data is read but TERRIBLY slow.
Heads worked fine when i back them to donor. I try swap both magnets too, top magnet only, bottom magnet only, nothing change.

I think it is quite popular problem with Seagate .10, .11 and .12. I have few cases like this. If anyone manage with this problem and could share this info I will be grateful. PM is enough.

[harddrivespecialist]

I think you better continue reading it, even though its very slow.

[arvika]

I think you better continue reading it, even though its very slow.

Yes, but it goes REALLY slow. It can take about 3-5 months to read it. I'm sure it is heads issue with compatibility. Surface is fine, SA is fine.

[BlackST]

Even with headmap? (clone first the working heads that read fast then the remaining). Otherwise I would try first another headstack then move pack and heads to another chassis, rather than playing with SA...

[arvika]

Yes, even with headmap... I try two different headstack. I clone from two heads first with normal speed. Then from two others, but it goes very slow. Heads are ok, when I put them back to donor they work very good with nominal speed.

[BlackST]

I'll pm you later today.
Meanwhile, have a merry Xmas.

[arvika]

I'll pm you later today.
Meanwhile, have a merry Xmas.

Mery Christmass

I will wait for PM.

[barak]

Is it possible it could be the pending bug?

[BlackST]

Is it possible it could be the pending bug?

NO.

[barak]

Is it possible it could be the pending bug?

NO.

And the argument for this accurate answer is the fact that two heads out of four are reading perfectly.

[northwind]

terminal output?

[arvika]

terminal output?

Rst 0x20M
(P) SATA Reset

[northwind]

Are there no output messages when imaging the slow heads?
Did you enable the option where full report is shown on terminal?

[arvika]

No, there is no output while reading. At this moment I read this drive about ~15 mln/24h so don't want interrupt until reads.

[hdrescue]

Did you tried with other destination drive?