Mid 2009 Model A1278 / 2.26 or 2.53 GHz Core 2 Duo processor EMC 2326

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Hard drive changed but not seen on the disk utility


I bought a new hard drive for my macbook pro 13" unibody 2009, i bought a Western Digital Scorpio Black 750Go, to change my poor old 160Go.

I've installed it correctly on the macbook pro, and when i put an install cd, it's not seen by the utility disk.

The only thing it sees is the optical drive, not the hard drive.

When i put the WD Drive on an another mac (or pc) as an external drive, it works.

Does this disk not compatible with my mac? or is it something else?

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See if this firmware update fixes your problem EFI 1.7 Update If your system is already running this or you don't see any improvement you'll need to use a jumper on your HD to set it for the older SATA data rate. Review WD documentation that came with your drive on locating the jumper setting.

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There are jumper pins located on the same side of the hard drive as where the cable plugs into it. There is a diagram on top of the HD showing how they should be jumped for each setting. The hard drive needs set to 1.5GBs to properly communicate with the HD controller.


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