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Generic Block Device Capability
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This file documents the sysfs file block/<disk>/capability
capability is a hex word indicating which capabilities a specific disk
supports. For more information on bits not listed here, see
include/linux/genhd.h
Capability Value
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GENHD_FL_MEDIA_CHANGE_NOTIFY 4
When this bit is set, the disk supports Asynchronous Notification
of media change events. These events will be broadcast to user
space via kernel uevent.
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