Recently I have been setting up a few new boxes that have an LSI MegaRAID controller. As of FreeBSD 8.0, there is a much more friendly tool included called mfiutil. It saves from having to install sysutils/megacli and using its rather complicated arguments (well, at first, after using it for a little while they make sense). Now, I know I setup a RAID10 that spans 3, 2 disk arrays. However, mfiutil is reporting it as a RAID1 volume.
When trying to develop plans to repurpose machines and not being the sys admin that setup the machines is a difficult task. Part of the plan is to audit the hardware and their current configuration.
Memory, CPU, partitions, etc are easy parameters to determine in FreeBSD; hardware RAID on the other is not so simple.