Device directories
Each device that is known to Linux® is represented by a directory in sysfs.
For CCW and CCW group devices the name of the directory is a bus ID that identifies
the device within the scope of a Linux instance. For a CCW
device, the bus ID is the device's device number with a leading 0.<n>.
, where <n> is the subchannel set ID. For
example, 0.1.0ab1.
CCW group devices are associated with multiple device numbers. For CCW group devices, the bus ID
is the primary device number with a leading 0.<n>.
, where
<n> is the subchannel set ID.
Device views in sysfs tells you where you can find the device directories with their attributes in sysfs.