Recent content by jcarlosmor

Thank you for your reply Jared. Let's talk only about WD400BB or WD800BB series for example. When you say "the head map used on each WD drive is stored in the ROM", do you mean inside the 8-pin EEPROM or inside the bootstrap memory of Marvell 88i65xx chip controller? I suppose that information...

I was in hope also that WD drives would have some Seagate-like straight-forward interface for echoing into a serial console software (HyperTerminal, Windmill, TeraTer, etc.) the post progress of the drive when power up, but as Jared advicea, the commands are proprietary. If you have experience...

For Sabre 53, what about replacing deffective double headstacks (with both upper or lower heads), with good single headstacks (with only upper or lower head). It appears that most of Sabre 53 of the same capacity (40 GB) were manufactured with both options of headstacks at assembly plant, maybe...

Hello to everybody, I would to know if you had some previous experiencies from Sabre 53 models head swapping. It appears that for the same capacity hard drives (40 GB), Western did used head stacks with only upper head or lower head, but also head stacks with both upper and lower heads. Any...

Hi to everyone, Does anybody remember some success cases with the old-good-times WD400BB drives? (or should I say the old-bad-screw-case-times WD400BB drives?, We all know about that evil headstack assembly screw on the cover, but that is another story...) I am trying to do a head swap for a...

I am Juan Carlos, electronic designer. PC-3000 or another specialized tools will need to wait unitl next year, but in the meaning time, trying to learn basic procedures, like PCB swaps, EEPROM reading/writing,etc. Actually, experimenting with lots of donors of the WD400 family days.