HGST (Hitachi Global Storage Technologies, before that IBM) drives such as Deskstar, Travelstar and Ultrastar are popular in servers and NAS systems. Since 2012 HGST belongs to Western Digital, but the HGST models keep their own numbering.
What is on an HGST / Hitachi label
| Field | Example | Meaning |
|---|---|---|
| Model | HDS721010CLA332, HUS724040ALE640 | Family, capacity, interface. |
| P/N | 0F10383 | Part number of the exact build – compare it completely. |
| MLC | JPT3AA | Build code of the head/media combination. The key value for donors. |
| Date | SEP-2011 | Production month. |
| Country | Thailand / Philippines / China | Factory. |
Donor drive
- Same model and the same MLC code. If the MLC is identical, the heads are usually compatible.
- Same P/N if possible, production month close to yours.
- Same number of heads.
PCB
- Compare the board number printed on the PCB (often starting with
0Aor220) and the MLC printed on the board sticker. - Many HGST/Hitachi boards store drive-specific data in a ROM chip. Transfer the ROM from the original board.
Ultrastar / server drives
Ultrastar SAS drives from storage systems (NetApp, EMC, Dell, HP) often have special firmware and 520- or 528-byte sectors. Read our page about replacement drives for RAID and servers.
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