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are there issue with fusion drive and installing Win7?


I have read that the 3TB option will not allow you to use a bootcamp partition.

http://www.twocanoes.com/support/wi...tb-or-larger-)-drive-in-lion-(10.7)-and-later

Boot Camp Assistant is not supported by Apple for hard drives larger than 2.2 TB. If you purchased a new iMac with the 3TB option (either with a Fusion drive or just a standard drive), Boot Camp Assistant will refuse to partition your hard drive into a Mac and Windows partition. However, it is still possible to create a working Boot Camp partition for Windows, provided you use the partitioning scheme as outlined in this tutorial.
 
There are work arounds for the 3TB fusion drive if u look around people have said how to do it. If u have to have a 3tb hard drive
 
Bootcamp Assistant won't allow you to partition - but the link I provided above details the workaround so you CAN partition the 3TB.
 
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