I have Fujitsu RX300 S7 server and LSI RAID Ctrl SAS 6G 1GB D3116 Contoller.
01:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2208 [Thunderbolt] (rev 03)
I have successfully installed Slackware 14 x86_64 on this server and booting fine with huge kernel (3.2.45).
But booting with generic kernel not work.
RAMDISK: Couldn't find valid RAM disk image starting at 0.
VFS: Cannot open root device "803" or unknown -block (8,3)
I have created ramdisk with this command
mkinitrd -c -k 3.2.45 -m megaraid_sas:reiserfs -o /boot/3.2.45-initrd.gz -s /boot/3.2.45-initrd-tree