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iomega 2tb not showing up on MacBook Pro

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  • Macbook Pro
  • Iomega
  • External Drive
  • Storage
Last response: in Storage
January 3, 2014 11:04:30 AM

I have a 2TB white iomega external drive running with an older MacBook Pro (15in circa 2008). It just came up with a "This disk is unreadable" error on two different Macs. When I try Disk First Aid, it doesn't seem to recognize the partition either. Ideas? Thanx in advance.

More about : iomega 2tb showing macbook pro

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a c 761 G Storage
January 3, 2014 2:21:37 PM

Possible drive failure or bridge-chip failure, a common issue with external hard drives as internal ones don't have a bridge-chip (it's just a small PCB inside the enclosure which handles the SATA-to-USB or Firewire interface conversion).

If it's just a bridge-chip failure, you can overcome that by buying a third-party hard drive enclosure for your Iomega drive. The third-party enclosure will have it's own bridge-chip.

If the drive exhibits the same issues as before, it has probably failed, which you can confirm by testing it with SeaTools (on a Windows PC of course, there is no Mac version): http://www.seagate.com/gb/en/support/downloads/item/sea...
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January 4, 2014 10:04:26 AM

Phillip Corcoran said:
Possible drive failure or bridge-chip failure, a common issue with external hard drives as internal ones don't have a bridge-chip (it's just a small PCB inside the enclosure which handles the SATA-to-USB or Firewire interface conversion).

If it's just a bridge-chip failure, you can overcome that by buying a third-party hard drive enclosure for your Iomega drive. The third-party enclosure will have it's own bridge-chip.

If the drive exhibits the same issues as before, it has probably failed, which you can confirm by testing it with SeaTools (on a Windows PC of course, there is no Mac version): http://www.seagate.com/gb/en/support/downloads/item/sea...


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January 4, 2014 10:05:05 AM

Thanx Phillip. Is there a diagnostic for Bridge Chip Failure?
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a c 761 G Storage
March 13, 2014 1:01:58 AM

If there is, I know nothing about it. Sometimes the only diagnostic test is simply to try a different unit, in this case a different enclosure.
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