Question about Macally 1 Bay PHR-250CC (0701107485355) FireWire (IEEE 1394), USB 2.0 External Drive Case

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Hard Drive not mounting

After upgrading the Seagate ASG model 7200 RPM 320gb hard drive in my (2.4 GHZ MacBook Pro to 500gb, I had hoped to use the existing 320 gb hard drive in an external hard drive enclosure Macally PHR-S250CC. A blue light came on, the hard drive spun, but it did not mount on any of the 3 computers I tried it on (Mac Pro, Macbook Pro, even Windows XP) (even with the additional USB power cable in case bus power wasn't enough). . I put the drive into a naked USB adapter to see if it had become damaged, etc. Worked fine.


I tried to troubleshoot, with 5 same brand same model enclosures, one from New-egg and 4 from Mac Mall. with the same results. I have three of these hard drives, Neither Hard drive can be recognized by Mac or Windows. I tried WD digital HD at last and was recognized right away. Do you think this could be a G-force problems? I would thank for any help on this.

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Check the jumper on each hard-drive.

My guess is that the WD drive has the jumper in the "correct" position, for mounting inside an external case, while the other drives have their jumper set to an "incorrect" position.

Set the jumper to MA(ster), not to SL(ave), nor to C(able)S(elect).

Posted on Sep 15, 2009

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Posted on Jan 02, 2017

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