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If you are going to provide hitachi data recovery services, the following data recovery tips are useful to you!

Two architectures: IBM architecture including original IBM drive and Hitachi drive from 2003 ; and Native Hitachi architecture(unsupported), i.e. DK23AA , DK23FA etc.

On IBM/HITACHI we can find two product lines: Travelstar and Deskstar.  Identification by model number: HTS541616J9AT00 and HDS721616PLAT80

5416 Family


PLAT Family


HITACHI Drive Firmware

-Firmware copy: Copy 0(SA-A), Copy 1(SA-B) and Factory copy(SA-C). Copy 1 is a copy of Copy 0, but not all modules are present in Copy 1. Factory copy locates on different area from Copy 0 and Copy 1 within the service area. There is a flag recorded on NVRAM, which decides which one is boot at power-up.

-Firmware compatibility:  there is a version marker recorded in modules like RESF/RAM0/OVR1 etc, which can be used to identify compatible firmware modules.

Module Function


NVRAM Data Structure


1: NVRAM version, A60A
2: Version checksum
3: FW boot flag. “0x01” boot from SA-A and “0x00” from SA-C, factory copy.
4: Head map “00 01 02 00”
5: Beginning of data area on disk surface. “14F1” (High byte backward, low byte forward)
6: Beginning of service area on disk surface. “83F8” (High byte backward, low byte forward).
7 : XGH7Z3DM, S/N on the label.


Hitachi data recovery tool recommended: HD Doctor for Hitachi

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