Note: When you install the optional 4-drive backplane option kit to upgrade toeight drives, make sure that you remove the dust shield (if one is present) fromthe hot-swap SAS/SATA signal connector on the system board. Carefully graspthe dust shield and pull it out of the signal connector.For more information about the requirements for SAS cables and connecting SASdevices, see the documentation that comes with these devices.For a list of supported options for the server, see http://www.ibm.com/servers/eserver/serverproven/compat/us/.Installing an adapterThe following notes describe the types of adapters that the server supports andother information that you must consider when installing an adapter. Adapter thatthe server supports might vary, depending on your server model.v Locate the documentation that comes with the adapter and follow thoseinstructions in addition to the instructions in this section. If you must change theswitch setting or jumper settings on the adapter, follow the instructions that comewith the adapter.v Read the documentation that comes with your operating system.v The server comes with the following adapter connectors, or slots:– Slot 1, PCI Express x8 (x4)Important: The x8 (x4) designation for slot 1 identifies an x8 slot that isdesigned to support x4 adapters and x8 adapters that can downshift tooperate at the x4 bandwidth. If you install an x8 adapter in slot 1 that candownshift to the x4 bandwidth, it will run at the x4 bandwidth. The x8connector can be used for x4 and x8 adapters. Check the information thatcomes with your adapter for compatibility information.– Slot 2, PCI Express x8 (x8)– Slot 3, PCI Express x8 (x8)– Slot 4, PCI-X 64-bit/133 MHz– Slot 5, PCI-X 64-bit/133 MHz– Slot 6, PCI 32-bit/33 MHzv You can install full-length adapters that are included in the ServerProven ® list inslots 2, 3, 4 and 5. You can only install half-length adapters in slots 1 and 6.v The 32-bit slot 6 supports 5.0 V keyed PCI adapters; they do not support 3.3 Vkeyed adapters. Universal adapters are supported in slots 4 and 5 if they areuniversally keyed.v You can order an optional IBM ServeRAID-MR10is VAULT SAS/SATA Controllerthat supports RAID levels 0, 1, 5, 6, 10, 50, and 60. You can install theServeRAID-MR10is SAS/SATA controller only in server models with eight 3.5 inchhot-swap hard disk drives installed. PCI slot 2 is the dedicated slot for theServeRAID-MR10is SAS/SATA controller. For instructions on how to install theServeRAID-MR10is SAS/SATA controller, see “Installing the optional IBMServeRAID-MR10is VAULT SAS/SATA Controller” on page 60.Note: Note: The onboard RAID controller will be disabled by BIOS when theServeRAID-MR10is SAS/SATA controller is installed in the server.v The server scans PCI Express slot 1, PCI-X slots 4 and 5, and PCI-Express slots2 and 3 to assign system resources. Then, the server starts the devices in the46 System x3400 Types 7973, 7974, 7975, and 7976: User’s Guide