ATA Over Ethernet, also known as AoE, is a low-level protocol used for communication with storage devices over a local area network (LAN). It is an open source network protocol that is a cost-effective alternative to Fibre Channel SANs and a simpler alternative to iSCSI SANs. It allows ATA commands to be transported directly over Ethernet, eliminating the need for additional protocols like TCP/IP, and is commonly used by embedded systems to access storage devices like SATA drives.
How does AoE work?
AoE is designed to work by transporting ATA commands directly over Ethernet. This allows storage devices to be accessed without the overhead of additional protocols like TCP/IP. Since AoE is not routable, it does not require IP addresses for storage devices, reducing security risks. Ethernet subnets can be set up to exclusively connect servers and their storage devices to make the system even more secure.
What are the benefits of using AoE?
The benefits of using AoE include its simplicity, low cost, and efficiency. Since it transmits ATA commands directly over Ethernet, it eliminates the need for additional protocols and TCP/IP offload engines. This makes AoE a less expensive alternative to Fibre Channel SANs. It is also simpler than iSCSI SANs, which require more processing power and additional protocols. Lastly, AoE is not routable, which means it can be more secure than other protocols that require IP addresses.
When is iSCSI a better solution?
If advanced security or file sharing over a larger network is required, iSCSI may be a better solution than AoE. iSCSI requires significant processing power and TCP/IP offload engines to manage commands, but it can be accessed remotely and may be better suited for larger networks.
Conclusion
AoE is a low-level protocol used for communication with storage devices over a LAN. Its simplicity, low cost, and efficiency make it a cost-effective alternative to Fibre Channel SANs and a simpler alternative to iSCSI SANs. Ethernet subnets can be set up to exclusively connect servers and their storage devices to make the system even more secure. If you’re in need of advanced security or file sharing over a larger network, iSCSI may be a better solution.
FAQs
- What does ATA stand for? ATA stands for Advanced Technology Attachment.
- Is AoE an open source protocol? Yes, AoE is an open source network protocol.
- Can AoE be used for a storage area network (SAN)? Yes, AoE can be used as the basis for a storage area network (SAN).
Overall, ATA over Ethernet is a reliable and efficient protocol designed to connect servers and storage devices over a LAN.
