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kernel-linus-doc-5.4.20-1.mga7.noarch.rpm

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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

GENHD_FL_MEDIA_CHANGE_NOTIFY
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Value: 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.