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.
The device name is of the form
being the AoE device shelf address, and
being the AoE slot address.
The size of the AoE device is in gigabytes (billions of bytes).
The network interface name is printed in the third column.
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.
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.
variable is set in the environment, it will override the default
will look for
sysfs, namely /sys.
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.
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.
In this example, the root user on a host named
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:~# ifconfig eth3 up
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