National Instruments MXI ユーザーズマニュアル

© National Instruments Corporation

1.

Power-on all of the expansion chassis in any order you choose.

2.

Power-on the host.

Typical PCI-PCI bridges and switches are used to add PCI devices to a PCI 
hierarchy in which all the bridges and devices are contained within a single 
chassis. Because of this, BIOSes and operating systems make the 
assumption that all PCI devices in the entire hierarchy will be available as 
soon as code execution begins at power-up. This assumption means that all 
of the expansion chassis must be turned on before the host PC for the BIOS 
and OS to correctly configure a MXI-Express system.

There are no requirements on how MXI-Express expansion chassis are powered up 

relative to each other, as long as they are all on before the computer is powered on.

Because operating systems and drivers commonly make the assumption 
that PCI devices will be present in the system from power-up to 
power-down, it is important to not power off the expansion chassis until 
after the host PC is powered off. Powering off the expansion chassis while 
the host is still on can cause crashes or hangs. The order in which expansion 
chassis are powered off, relative to each other, is not important.