/sys/devices/virtual/block/dm-4
Directories:

• /sys/devices/virtual/block
• /sys/devices/virtual/block/dm-4/power
• /sys/devices/virtual/block/dm-4/holders
• /sys/devices/virtual/block/dm-4/dm
• /sys/devices/virtual/block/dm-4/queue
• /sys/devices/virtual/block/dm-4/integrity
• /sys/class/block
• /sys/devices/virtual/block/dm-4/trace
• /sys/devices/virtual/bdi/254:4
• /sys/devices/virtual/block/dm-4/slaves

Files:

• uevent
• ext_range
• range
• alignment_offset
• dev
• ro
• stat
• size
• discard_alignment
• capability
• hidden
• removable
• inflight