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The EtherDrive (R) HOWTO for users of 2.6 kernels is found at ...
http://www.coraid.com/support/linux/EtherDrive-2.6-HOWTO.html
It has many tips and hints!
CREATING DEVICE NODES
Users of udev should find device nodes created automatically. Two
scripts are provided in Documentation/aoe as examples of static
device node creation for using the aoe driver.
rm -rf /dev/etherd
sh Documentation/aoe/mkdevs.sh /dev/etherd
... or to make just one shelf's worth of block device nodes ...
sh Documentation/aoe/mkshelf.sh /dev/etherd 0
There is also an autoload script that shows how to edit
/etc/modprobe.conf to ensure that the aoe module is loaded when
necessary.
USING DEVICE NODES
"cat /dev/etherd/err" blocks, waiting for error diagnostic output,
like any retransmitted packets.
"echo eth2 eth4 > /dev/etherd/interfaces" tells the aoe driver to
limit ATA over Ethernet traffic to eth2 and eth4. AoE traffic from
untrusted networks should be ignored as a matter of security.
"echo > /dev/etherd/discover" tells the driver to find out what AoE
devices are available.
The block devices are named like this:
e{shelf}.{slot}
e{shelf}.{slot}p{part}
... so that "e0.2" is the third blade from the left (slot 2) in the
first shelf (shelf address zero). That's the whole disk. The first
partition on that disk would be "e0.2p1".
USING SYSFS
Each aoe block device in /sys/block has the extra attributes of
state, mac, and netif. The state attribute is "up" when the device
is ready for I/O and "down" if detected but unusable. The
"down,closewait" state shows that the device is still open and
cannot come up again until it has been closed.
The mac attribute is the ethernet address of the remote AoE device.
The netif attribute is the network interface on the localhost
through which we are communicating with the remote AoE device.
There is a script in this directory that formats this information
in a convenient way.
root@makki linux# sh Documentation/aoe/status.sh
device mac netif state
e6.0 0010040010c6 eth0 up
e6.1 001004001067 eth0 up
e6.2 001004001068 eth0 up
e6.3 001004001065 eth0 up
e6.4 001004001066 eth0 up
e6.5 0010040010c7 eth0 up
e6.6 0010040010c8 eth0 up
e6.7 0010040010c9 eth0 up
e6.8 0010040010ca eth0 up
e6.9 0010040010cb eth0 up
e9.0 001004000020 eth1 up
e9.5 001004000025 eth1 up
e9.9 001004000029 eth1 up
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