problem of read sectors

[digital]

I Have received several Seagate Hard Drives that is possible to clone several million of sectors without errors. However later to clone 30%, 40% or 50% of sectors don't is possible to clone more. In another words, part of sectors is cloned without errors and part of sectors don't is cloned, no read, get errors in all sectors. What is this problem? Is firwmare? translate? or what?

[AJ2008]

I guess is possible you have some platter shift, like in eccentricity. Was disk dropped? Probably inside external case?

[digital]

Hi, thanks for the reply. Did not change the platter, the disk is still sealed, also did not fall.

[digital]

I guess is possible you have some platter shift, like in eccentricity. Was disk dropped? Probably inside external case?

Hi, thanks for the reply. Did not change the platter, the disk is still sealed, also did not fall.

[-BR-]

What family / model(s) are you speaking about?
Any terminal output on the errors?

[digital]

What family / model(s) are you speaking about?
Any terminal output on the errors?

The model is ST3750330AS - 7200.11 - FW SD15, clone halfway and then gives the screen black and yellow

[AJ2008]

Did this case have 0 LBA/LED CC error?

also, did you clear glist on this case?

[digital]

Did this case have 0 LBA/LED CC error?

also, did you clear glist on this case?

No led cc, no clone

[AJ2008]

I tihnk is very likely that somebody did try firmware repair previously on this case.