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Data recovery and disk repair questions and discussions related to old-fashioned SATA, SAS, SCSI, IDE, MFM hard drives - any type of storage device that has moving parts
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Re: SAFE MODE HITACHI???

January 13th, 2019, 15:57

After starting the HDD you have to do an SA STRUCT TEST, and after giving an error in all the modules, you will write the modules and write them.

Re: SAFE MODE HITACHI???

January 13th, 2019, 16:15

If I have it working. The only thing that takes a second more than leaving BSY.

Re: SAFE MODE HITACHI???

January 13th, 2019, 18:36

If after changing the values of the SA entries in the NVRAM, the SA test is performed and if the RSVDs give OK and the others all errors, the modules can be recorded.

Re: SAFE MODE HITACHI???

January 13th, 2019, 19:20

Yes, I have recovered the HDD.
I have to broach the access to the copies of SA modifying the NVRAM before doing the test.
I modify NVRAM.
I turn on the HDD and enter RDY.
I charge the LDR.
I do the SA test. (If it gives OK in the RSVD, it is a good signal).
I write the modules.

a greeting

Re: SAFE MODE HITACHI???

January 14th, 2019, 3:05

Once the NVRAM is changed you do not have to lift the PCB at all or the HDD will not read the copy F. If you want later in the evening, in our schedule we can make another TV, if it is not any inconvenience for you.
I find a problem after this and that is that the MRTLAB is not able to read the F copy after recovering the HDD, but if it is to rewrite and then read.

Re: SAFE MODE HITACHI???

January 14th, 2019, 15:31

Where can I get HRT?

Re: SAFE MODE HITACHI???

January 14th, 2019, 16:45

If you cut the reading channel at the start of the HDD, you will not be able to record the modules.
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Re: SAFE MODE HITACHI???

January 15th, 2019, 10:38

It would be interesting now to see how the SA can be recovered in the HITACHI-ARM, I would like to continue with the thread that I opened for the ARM, but it is going to be a very complicated task.

Re: SAFE MODE HITACHI???

January 16th, 2019, 3:47

mhp666 wrote:By now you did manage to learn about WD, Fujitsu, Seagate F3 and now you are at HGST. What brands are you still missing ?

Right now I'm missing FUJITSU, SAMSUNG, TOSHIBA, HITACHI-ARM.
My priority is HITACHI-ARM, TOSHIBA, SAMSUNG and FUJITSU in that order.
mhp666 wrote:That thing of changing regions made SeDiv write modules to the wrong place on track erasing stuff that are not enumerated by modules !!! Remember that on IBM based drives there are info on tracks that belong to firmware as well but are not mention on the module directory and can't be retrieve with module reading ...

I have also observed abnormal behaviors in the HD after restoring the modules: prolonged waiting times and even not being properly recognized, although I do have access to the data.
I want to continue testing and I am going to request MRTLAB to include the option to save the tracks of the SA (At least I will try it).
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