Hi!
I was asked to install Linux (preferrably Debian or Ubuntu) on a Fujitsu Siemens TX120 server machine. This has native SAS support, but the guys who owns the machine want to use a SATA HDD without RAID, which is connected to a controller card. The setup from CD-ROM is OK, but after the first restart the system says: "Operating system not found". It seems that the BIOS doesn't support booting from an external SATA HDD, so I think I need some special boot-CD, which can call the boot process from that HDD. How it is possible?

Just for the archive: the problem solved.
I connected the SATA HDD to the motherboard's SAS controller, enabled it, and it works like a charm.