Booting external drives using firewire.

Ok in the process cloning my computer to an external drive.
The Shell -
Macally G-S350SUAB USB2.0/Firewire 400/800/eSATA Case, for 3.5inch SATA HDD.
The Drive -
Western Digital 2TB SATA 6Gbps Power Saving Internal Hard Drive OEM - Caviar Green.
This drive partitioned and format via Firewire 800.
The Process of cloning was all correct.
The backup boots via USB2.0 - all ok.
My difficultly lies trying to get it to boot from Firewire 400, or 800.
All partition are visible when using internal drive. And bootable volumes are all available to select when using firewire via Disc Start in System Prefs.
Anyone got any ideas please?

There are reports of problems booting with WD drives and some enclosures, espeically the power saving ones.
I had one once, and I've learned to turn it on then power on the computer else the drive goes to sleep.
Read my backup, bootable clones, troubleshooting, performance, wifi security and restore info/advice here
https://discussions.apple.com/message/16276201#16276201

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    Message was edited by: videocrafter

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