Hello, I have this Hitachi hard drive JC0930HX0TMZ2H with firmware A3MA that windows detects only have a capacity of 31 MB, instead of 1TB.
HD Tune shows me as a 31 MB capacity, and if I click on "Health" it doesn't show the smart status, it shows only a white screen.
Which is the problem?
Maybe the smart module in the firmware is corrupt?

Update BIOS on your motherboard and remove HPA from you drive

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I will check in mhdd if it has the HPA on, if it has i will remove with nhpa command.
Thank you.

Is it just my impression that the reading speed of the drive is way too low?

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Thank you very much, you were right the problem was the HPA.
I gave the nhpa command in mhdd, rebooted and the drive is seen again with full capacity.
I did the sector scan in mhdd, no bad sectors were found and the smart is ok.

The drive was into a multimedia box but the usb connector broke, so i pulled out and connected directly to the motherboard via sata.
The motherboard is a Gigabyte brand, i don't know why the motherboard did the HPA stuff, surely i didn't.
Am afraid to connect external drives into this motherboard, what can i do to turn off the HPA of this Gigabyte M.B.?

This is a well-known issue with the BIOS on some of those motherboards, mentioned many times on this forum.


I suggest that you ask the relevant motherboard support people. This is not a motherboard support forum, so you may find more recent information from people who are interested in motherboards. IMHO the best advice from here, is likely to be what Doomer has already told you about the BIOS.

I guess you had the drive attached via USB, to cause the slow throughput seen on the HDTune benchmark picture you supplied. If it was attached via SATA then, as northwind said, the throughput was unusually slow.

Gigabyte MB's use to create HPA in order to save BIOS image. Typically the size of HPA is 2 or 4 MB , but if the BIOS is rather old and HDD too big some bad things can happen ...