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Sun Server X2-8 Product Documentation Sun Server X2-8 (formerly Sun Fire X4800 M2) Documentation Library |
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Sun Server X2-8 Product Documentation Sun Server X2-8 (formerly Sun Fire X4800 M2) Documentation Library |
I/O and Interrupt Resource Allocation
Option ROM and I/O Space Allocation
How to Configure Option ROM and I/O Space Allocation
Allocating MSI Interrupt Space (Oracle Solaris OS Only)
How to Identify and Fix Interrupt Resource Shortages
If you add a PCIe express module or a fabric expansion module to an eight-socket system (with CPU modules in all four slots), when the system boots, the BIOS might not be able to allocate option ROM or I/O space to all the devices that require it.
If this happens, when you boot, POST generates error messages. These identify any devices that have not had option ROM or I/O space allocated.
For option ROM, the messages look like this:
Warning: Out of option ROM space for device EM0.1 [04:00:01]
For I/O space, the messages look like this:
Warning: Not enough IO address space allocated for device EM0.0 [0A:00:01] Warning: Not enough IO address space allocated for device EM0.0 [0A:00:00] Warning: Not enough IO address space allocated for device EM0.1 [05:00:01] Warning: Not enough IO address space allocated for device EM0.1 [05:00:00] Warning: Not enough IO address space allocated for device EM0.1 [04:00:01] Warning: Not enough IO address space allocated for device EM0.1 [04:00:00]
Each slot can generate several messages. This is normal.
It is possible that the device you added has been assigned option ROM and/or I/O space at the expense of some other device. If this is the case, the device you added does not appear in the list, but the original device does. This depends on the position of each device in the probe order.
Error messages inform you that a device that you wish boot from has not been allocated option ROM and/or I/O space.
You wish to be able to run a configuration utility such as the LSI RAID utility on a device that has not been allocated option ROM.
(Optional) You wish to make the error messages go away.
Note - There is no need to configure option ROM or I/O space allocation simply because of these messages, unless you require the functionality provided by the option ROM and the I/O space.
See Also
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