Why won't Mavericks launch from external drive?

2007 24-inch iMac
Introduced August 2007
Discontinued April 2008
Model Identifier iMac7,1
Model #A1225
EMC 2134
Processor 2.8 GHz Intel Core 2 Duo
Memory 4 GB 667 MHz DDR2 SDRAM
Internal hard drive crashed years ago.
Mac OS X Version 10.6.8 Snow Leopard on 1TB external hard drive (790 GB free space) Disk A
Downloaded Mavericks (5.31 GB) and moved installer out of Applications to Disk A directory
Mac OS X Version 10.9.1 Mavericks clean install on 1TB external hard drive Disk B
Mac did apparently attempt to automatically restart with Disk B as the startup drive, but the result is the infamous folder with the question mark.
To restart in 10.6.8, I have to turn the computer off then on with the switch at the left rear bottom of the display and hold down the D key on the keyboard.
In System Preferences, Startup Disk shows both disks and allows Restart on Mac OS X, 10.9.1 on Disk B
However, the result is still the infamous folder with the question mark.

You sound like you are doign everyting right.
What did come out in the detailed telling is that it does not comlete install - it fails during the interim restart.
So the installer thinks all is well, btu isn't.
The OWC drives are obviously mac-friendly.
Wish i had more to say, except maybe - download to and run the installer from the mac itself.
Why are you not booting from the external and installing on the mac?  That makes more sense to me...
Grant

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    disk2
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    $ /Applications/MacpowerAP/GetSMART 6
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    1394
    1394
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    MPT934DS1.20.0104.00
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