What: /sys/bus/xen-backend/devices/*/devtype Date: Feb 2009 KernelVersion: 2.6.38 Contact: Konrad Rzeszutek Wilk Description: The type of the device. e.g., one of: 'vbd' (block), 'vif' (network), or 'vfb' (framebuffer). What: /sys/bus/xen-backend/devices/*/nodename Date: Feb 2009 KernelVersion: 2.6.38 Contact: Konrad Rzeszutek Wilk Description: XenStore node (under /local/domain/NNN/) for this backend device. What: /sys/bus/xen-backend/devices/vbd-*/physical_device Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk Description: The major:minor number (in hexadecimal) of the physical device providing the storage for this backend block device. What: /sys/bus/xen-backend/devices/vbd-*/mode Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk Description: Whether the block device is read-only ('r') or read-write ('w'). What: /sys/bus/xen-backend/devices/vbd-*/statistics/f_req Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk Description: Number of flush requests from the frontend. What: /sys/bus/xen-backend/devices/vbd-*/statistics/oo_req Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk Description: Number of requests delayed because the backend was too busy processing previous requests. What: /sys/bus/xen-backend/devices/vbd-*/statistics/rd_req Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk Description: Number of read requests from the frontend. What: /sys/bus/xen-backend/devices/vbd-*/statistics/rd_sect Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk Description: Number of sectors read by the frontend. What: /sys/bus/xen-backend/devices/vbd-*/statistics/wr_req Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk Description: Number of write requests from the frontend. What: /sys/bus/xen-backend/devices/vbd-*/statistics/wr_sect Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk Description: Number of sectors written by the frontend. What: /sys/bus/xen-backend/devices/*/state Date: August 2018 KernelVersion: 4.19 Contact: Joe Jin Description: The state of the device. One of: 'Unknown', 'Initialising', 'Initialised', 'Connected', 'Closing', 'Closed', 'Reconfiguring', 'Reconfigured'.