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- What: /sys/devices/.../sun
- Date: October 2012
- Contact: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
- Description:
- The file contains a Slot-unique ID which provided by the _SUN
- method in the ACPI namespace. The value is written in Advanced
- Configuration and Power Interface Specification as follows:
- "The _SUN value is required to be unique among the slots of
- the same type. It is also recommended that this number match
- the slot number printed on the physical slot whenever possible."
- So reading the sysfs file, we can identify a physical position
- of the slot in the system.
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