hi to all

my hdd stm3500320as head failure then swap head with donor hdd

Now, hdd worked in DE and i seen data in explorer but very very slowly!?
in every second clik clik and continues
then i see in terminal

Serial FLASH boot code checksum failure!
BOOT CMD:
DS
AP <addr>
WT <data>
RD
GO
TE
BR <divisor>
?
RET

what's that problem?

and also
2>U
1>N1
then head clik and clik then upper message apear again

_________________
NS DATA RECOVERY
www.nsrecovery.ir

you should try to clone it very very slow.

_________________
ZeBong
" что случилось в России - останется в России "
" Россия еще раз"

thanks for your answere

do't chose from boot CMD?

_________________
NS DATA RECOVERY
www.nsrecovery.ir

Agree with Zebong clone it or Make image .

i do again
2>U
1>N1
then clik and clik then is done

but after power off/on hdd detect 0 byte
then i do bsy solution
now again hdd detect and see data in explorer DE

what that problem with this hdd?

_________________
NS DATA RECOVERY
www.nsrecovery.ir

Looks like damaged ROM to me. Not good on this family.If you can get the data, albeit slowly, maybe persistence and patience is the answer.

i started to image from drive
first 12 hour imaged only 30,000,000 sectors

_________________
NS DATA RECOVERY
www.nsrecovery.ir

a risistor along the rom chip is lost