Mac Pro :: External SATA Drive Spontaneously Disconnects

Oct 2, 2009

Machine is an early 2008 Mac Pro. I'm connecting two external SATA desktop hard drives via eSATA (NewerTech Voyager S2 enclosures) and a Newer Technology eSATA Extender Cable (connected to the 5th and 6th internal SATA headers). One of the drives is used as a Time Machine backup disk. This TM disk has been periodically disconnecting and generating warning messages about improper ejection. It reconnects with a restart, but usually will disconnect again within a day. I swapped the drives in the docks, so each was connected via the other dock, cable, and internal header. The same problem persists - the TM disk disconnects periodically despite having switched docks.

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Info:
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my current laptop hardware: 

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Info:
MacBook Pro, Mac OS X (10.5.8), 15.4" 2.4Ghz (Early 2008 Model)

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