1*bb74ac23SYasuaki IshimatsuWhatt: /sys/devices/.../sun 2*bb74ac23SYasuaki IshimatsuDate: October 2012 3*bb74ac23SYasuaki IshimatsuContact: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> 4*bb74ac23SYasuaki IshimatsuDescription: 5*bb74ac23SYasuaki Ishimatsu The file contains a Slot-unique ID which provided by the _SUN 6*bb74ac23SYasuaki Ishimatsu method in the ACPI namespace. The value is written in Advanced 7*bb74ac23SYasuaki Ishimatsu Configuration and Power Interface Specification as follows: 8*bb74ac23SYasuaki Ishimatsu 9*bb74ac23SYasuaki Ishimatsu "The _SUN value is required to be unique among the slots of 10*bb74ac23SYasuaki Ishimatsu the same type. It is also recommended that this number match 11*bb74ac23SYasuaki Ishimatsu the slot number printed on the physical slot whenever possible." 12*bb74ac23SYasuaki Ishimatsu 13*bb74ac23SYasuaki Ishimatsu So reading the sysfs file, we can identify a physical position 14*bb74ac23SYasuaki Ishimatsu of the slot in the system. 15