Kernel-3.10.0-957.el7_capability

Generic Block Device Capability

This file documents the sysfs file block//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

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.