NAME

       aoe-stat - print aoe device status report

SYNOPSIS

       modprobe aoe
       aoe-stat
       env sysfs_dir=/sys aoe-stat

DESCRIPTION

       The aoe-stat script collects information on ATA over Ethernet devices from sysfs.

       For  each  AoE  device the kernel has discovered, there is one row in the script's output.
       Each row has the following columns.

       devicename
              The device name is of the form eX.Y,
               with X being the AoE device shelf address, and Y being the AoE slot address.

       size   The size of the AoE device is in gigabytes (billions of bytes).

       ifname The network interface name is printed in the third column.

       payload
              The number of bytes read from or written to the storage target in each  AoE  packet
              appears  in  the  fourth  column,  unless  the  aoe  driver  does  not  export this
              information.

       status The device status is in the last column.   Possible  values  are   up,   down,  and
              down,closewait.   The  "up" status means the aoe driver considers this device ready
              for I/O.  The "down" status means the opposite.  The "down,closewait" status  means
              that  some  software  still has the device open, and when this straggler closes the
              device, it will enter the "down" state.

ENVIRONMENT VARIABLES

       If the sysfs_dir variable is set in the environment, it will override the default location
       where aoe-stat will look for sysfs, namely  /sys.

WARNINGS

       If  the minor device number of a device node does not match that of its namesake, aoe-stat
       will print a warning as shown below.

              nai:~# aoe-stat
                    e0.3         0.104GB   eth0 up
                    e0.4      4398.046GB   eth0 up
                   e20.0      1000.215GB   eth0 up
                   e42.0      2000.431GB   eth0 up
              aoe-stat Warning: device node /dev/etherd/e45.1 has wrong minor device number
                   e45.1      1152.874GB   eth0 up

       Using such a device node is dangerous, because its name doesn't match  the  actual  device
       that  you  would  be  reading  from  and  writing to.  Such a broken device node should be
       removed.  Device nodes are created by udev or (on systems without udev) by aoe-mkdevs.

EXAMPLE

       In this example, the root user on a host named nai loads the aoe driver  module  and  then
       prints a list of all the available aoe devices.  Then he remembers to bring up the storage
       network interfaces, does an AoE discovery, and prints the list again.  This time the  list
       shows all the devices in shelf seven.

              nai:~# modprobe aoe
              nai:~# aoe-stat
              nai:~# ifconfig eth3 up
              nai:~# aoe-discover
              nai:~# aoe-stat
                    e0.0     10995.116GB   eth0 up
                    e0.1     10995.116GB   eth0 up
                    e0.2     10995.116GB   eth0 up
                    e1.0      1152.874GB   eth0 up
                    e7.0       370.566GB   eth0 up
              nai:~#

SEE ALSO

       aoe-discover(8), aoe-interfaces(8), aoe-mkdevs(8), aoe-mkshelf(8), aoetools(8), udev(7).

AUTHOR

       Ed L. Cashin (ecashin@coraid.com)

                                                                                      aoe-stat(8)