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Other Hardware and Peripherals Other Apple systems and peripherals discussions including the Apple Watch.

Internal USB Card - Losing External HDD

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Member Since: Sep 21, 2008
Location: UK
Posts: 20
christianhough is on a distinguished road
Mac Specs: MacPro Quad 2.8 8GB & MacBook Pro Dual 2.4

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Having an issue with my internal USB card and just wondered if anybody has come across a similar thing?

Basically, I installed a Mac compatible internal USB Card into my 2008 Intel MacPro (Allegro USB PCIe). The card works fine and runs all my external HDD's; However, when the Mac goes into standby, it loses the external HDD's. So when I awaken the Mac, I'm greeted with the 'Device Removal' message.

When I ran the HDD's off my cheap USB Hub, it used to retain the HDD's and not remove them, so when I awoke the the system they were still there.

Anybody know of a work around for the internal card? I'm concerned I'm going to accidentally corrupt the external HDD's and don't wan to have to eject them every time I put the Mac into standby.

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Member Since: Mar 20, 2010
Posts: 34
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Mac Specs: Mac Mini (late 2009) with Mac OS X Snow Leopard 10.6.2

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The problem could be simply that the card isn't compatible with those drives. The card can read and write to them, but it has a hard time when it goes into sleep mode.

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