I believe that Areca RAID controllers have become common enough that it is reasonable to include the arcmsr driver in the default kernel config/initrd image as constructed by genkernel. The arcmsr driver represents the RAID controller as a SCSI device so it should be added to the MODULES_SCSI in both the x86 & x86_64 archs. Also, since most Areca controllers have more then 2TB of storage attached the CONFIG_EFI_PARTITION option should be set in the kernel to suport GPT parition tables. Reproducible: Always
OK. This is fixed in SVN now and will show up in the next genkernel release...
Please test genkernel 3.4.9_prer1 or better. This should be fixed now.