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Use newer 2.5" SATA disks in a MacBook or Mac mini
Authored by: am5ki on Feb 29, '08 12:55:47PM

Actually, the hint is correct, but does not apply in all circumstances. The apparent confusion is caused by HDD vendors. Some SATA II HDDs will not fall back to SATA I speed unless they two pins (which pins depends on drive) are bridged by a jumper. Without the jumper present, they drives will attempt to run as SATA II speed regardless of what the SATA controller's capabilities are. When such drive is left without a jumper and then is connected to a SATA I controller, the drive will simply not work. Some of the WD (Western Digital) drives behave like that.

I have also seen drives where the SATA speed is solely controlled by the jumper setting, meaning, you get SATA I or SATA II depending on the jumper setting only and regardless of your controller, as long as the controller can handle selected speed.

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