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1What: /sys/bus/xen-backend/devices/*/devtype2Date: Feb 20093KernelVersion: 2.6.384Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>5Description:6 The type of the device. e.g., one of: 'vbd' (block),7 'vif' (network), or 'vfb' (framebuffer).8 9What: /sys/bus/xen-backend/devices/*/nodename10Date: Feb 200911KernelVersion: 2.6.3812Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>13Description:14 XenStore node (under /local/domain/NNN/) for this15 backend device.16 17What: /sys/bus/xen-backend/devices/vbd-*/physical_device18Date: April 201119KernelVersion: 3.020Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>21Description:22 The major:minor number (in hexadecimal) of the23 physical device providing the storage for this backend24 block device.25 26What: /sys/bus/xen-backend/devices/vbd-*/mode27Date: April 201128KernelVersion: 3.029Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>30Description:31 Whether the block device is read-only ('r') or32 read-write ('w').33 34What: /sys/bus/xen-backend/devices/vbd-*/statistics/f_req35Date: April 201136KernelVersion: 3.037Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>38Description:39 Number of flush requests from the frontend.40 41What: /sys/bus/xen-backend/devices/vbd-*/statistics/oo_req42Date: April 201143KernelVersion: 3.044Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>45Description:46 Number of requests delayed because the backend was too47 busy processing previous requests.48 49What: /sys/bus/xen-backend/devices/vbd-*/statistics/rd_req50Date: April 201151KernelVersion: 3.052Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>53Description:54 Number of read requests from the frontend.55 56What: /sys/bus/xen-backend/devices/vbd-*/statistics/rd_sect57Date: April 201158KernelVersion: 3.059Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>60Description:61 Number of sectors read by the frontend.62 63What: /sys/bus/xen-backend/devices/vbd-*/statistics/wr_req64Date: April 201165KernelVersion: 3.066Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>67Description:68 Number of write requests from the frontend.69 70What: /sys/bus/xen-backend/devices/vbd-*/statistics/wr_sect71Date: April 201172KernelVersion: 3.073Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>74Description:75 Number of sectors written by the frontend.76 77What: /sys/bus/xen-backend/devices/*/state78Date: August 201879KernelVersion: 4.1980Contact: Joe Jin <joe.jin@oracle.com>81Description:82 The state of the device. One of: 'Unknown',83 'Initialising', 'Initialised', 'Connected', 'Closing',84 'Closed', 'Reconfiguring', 'Reconfigured'.85