Hitachi HDT721010SLA360 - no ID/incompatible USAG/NV-RAM after PCB-Swap

[comasutra]

Hello friends,

have a problem with a Hitachi HDT721010SLA360 Hard-Drive. The PCB was dead (not spinning), and the customer bought a donor-PCB (matching first two lines on the Sticker) and soldered U5 from old PCB to the new one. Now the drive is spinning but has no ID.

I could initialize the Drive by choosing the Family (HDx7210SL) and the "Switch SA Access"-Button. Could Read most modules (see Log). in DE Drive read with 99% Errors an extremly slow on all Heads. SA-Structure-Test shows following Errors:

Information about factory copy
------------------------------

Module not loaded! ID = RSVD Copy F; SA marker
Error : Module is not loaded (RSVD, SA marker)


Report on module USAG, "Main module table"
ABA..................................... : FE020000
Length (sectors)........................ : 2
Loaded.................................. : Yes
Identified.............................. : Yes

mu-code................................. : ST6OA39N
FW Ver code............................. : 944ACF71
Incompatible with NV-RAM!


Report on module RAM0, "Code module"
ABA..................................... : FE020002
Length (sectors)........................ : 139
Loaded.................................. : Yes
Identified.............................. : Yes

mu-code................................. : A39N
FW Ver code............................. : 944ACF71
Incompatible with active USAG!


Report on module OVR1, "Code overlay module"
ABA..................................... : FE02008D
Length (sectors)........................ : 160
Loaded.................................. : Yes
Identified.............................. : Yes

mu-code................................. : A39N
FW Ver code............................. : 944ACF71
Incompatible with active USAG!

I tried the NV-RAM adjustment-method and rewrite PSHT and RDMT factory copy to 0 and 1 as described here http://forum.acelaboratory.com/viewtopic.php?t=7772#p26880 but nothing changed.

As Igor wrote here http://forum.acelaboratory.com/viewtopic.php?t=7398#p25619 "there are several bytes that can be changed in NV-RAM" ... NV-RAM is attached.

Does anyone have an idea?

Thanks in advance!
Boerge

[Sergey_TS]

comasutra, Both chips U5 and U7 should be resoldered here

[comasutra]

Hi Sergey,
thanks for reply, but there is no U7-Chip soldered on both boards.

Regards

[Sergey_TS]

comasutra, no need to worry about Factory copy incompatibilities.

in DE Drive read with 99% Errors an extremly slow on all Heads

But 1% of sectors is readable, correct? Where are these sectors located? In the HDD beginning, end or randomly? By one head or different heads?