/usr/share/doc/linux-doc/block/capability.txt is in linux-doc 3.13.0-49.83.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 | Generic Block Device Capability
===============================================================================
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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