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