HITACHI HDS728080 PLAT 20

[zebong]

Hi to all,

Have this case that the disk dont spin and it dont have any ATA register.

Change the PCB with a equal one but with different PCB numbers and i can get ID and serial.

When i try to copy any sector with DE, i have a ECC reading error ?

Anyone knows which number is the TVS or FUSE , to repair the patient PCB.


Thanks

[beto]

zebong u are not forgetting someting.. like NVRAM?

Regards

[zebong]

Yes i know that, but what i notice in this was:

- when i change the PCB i could get ID, and read the modules !!!

is this possible without change the NvRam, normaly when i change PCB and dont change the nvram i can not get ID i have to change also Nvram.


Waiting for any comment if someone happen this.


Regards

[HDD Spaz]

if nv ram is not compatible i think disk goes into safe mode so therefore modules can be read. Swap NV Ram or try to rebuild NV RAM using UDMA.

[quasimodo]

Yes, as long as heads are good you can access SA, even with wrong NV-RAM. That's how Ace and SD rebuilt NV-RAM simply by rebuilding from SA. Run dynamic repair and you should be able to access data area. In some cases you have to set LBA too.

[pepe]

I am not facing with PLAT drives every day, but don't they store SA location in the NVRAM, as their other brothers do?
If so, it is not that probable that u can access the SA with a different NVRAM unless u set SA location before...

pepe

[quasimodo]

Pepe is right, PLAT stores the beginning of the SA location in the NVRAM. Not sure if SA location changes allot on the same model drive. I just did a PLAT yesterday and I was able to access SA with donor PCB, but the donor was from the same Raid 0 set and was 100% compatible and within 8 weeks of manufacturing date. Either way with PC3K UMDA or SD tool you should be able to easily repair this one

[pepe]

Then it seems PLAT do not change SA location that much

pepe

[quasimodo]

Sir Pepe,

I did WD2500JB last week also from Lacie RAID0 both drives where identical and had the same day of manufacturing and even the serial number was close. The rom was 100% compatible. It would be interesting to know how frequently adaptive information changes for the manufacturers. I know this probably changes often, but it would be interesting to know.

[pepe]

yes.... it would be interesting to see if MHAs are interchangeable...