'm trying to create partitions for a slackware instalation on my computer (beside Windows 7) just to have a nice distro running mostly for school but when I run fdisk and print the partitiontable I get the following message:

Partition x does not end on cylinder boundary. (in my case x = 1, just using x to help googlers).

I must say I'm using a raid card (AMCC 3ware 9500S SATA RAID Controller). Maybe this is the problem.

How can I fix this without loosing any data?

(I've posted this qeustion on stack overflow aswell but then people sugjested it should be moved to here, but I don't know how to move my question so I just posted it here manually (I hope that's ok))