ATA over Ethernet
- ATA over Ethernet (AoE) is a network protocol developed by the Brantley Coile Company, designed for simple, high-performance access of SATA storage devices over Ethernet networks. It is used to build storage area networks (SANs) with low-cost, standard technologies.
Prequisites to AE
To use AOE you need the AUR packages AUR and AUR.
AoE does not use IPv4/IPv6; it works directly on top of Ethernet and is limited to the local subnet. It is enough to make sure that the interface is up. (For best performance, the subnet should use jumbo frames.)
# ip link set eth0 up
Target: Export a disk
You can export block devices or image files using
vblade or the
Create an empty disk image:
# dd if=/dev/zero of=vblade0 bs=1M count=256
vblade to export the disk over eth0:
# vblade 1 1 eth0 vblade0
Exported disks are identified by their "shelf ID" and "slot ID" (within that shelf), in this case
1.1; the combination must be unique across the SAN.
Initiator: Attach to a disk
Ensure the kernel module is loaded:
# modprobe aoe
By default all interfaces are used, but you can specify a whitelist either as
aoe module parameter, or using the
# aoe-interfaces eth0
The kernel module performs periodic discovery; to do it immediately (e.g. after changing interfaces) use
aoe-discover. Afterwards use
aoe-stat to list "visible" disks.
# aoe-discover # aoe-stat e1.1 0.001GB eth0 up
The first column shows a device name which also can be found under
/dev/etherd as a regular block device. You can partition it with fdisk, or just create a file system:
# mkfs.ext4 /dev/etherd/e1.1 # mkdir /mnt/e1.1 # mount /dev/etherd/e1.1 /mnt/e1.1