Ethernet in data storage device
A Data Storage Device (DSD) includes a plurality of solid-state memories for storing data and a controller configured to receive a packet from a host including a command to read or write data in a solid-state memory of the plurality of solid-state memories and a header to communicate between the host and the DSD. The header in the packet is changed into an internal header to communicate between the controller and the solid-state memory. An internal command and the internal header are sent to the solid-state memory to perform the command.
1. A Data Storage Device (DSD), comprising:
a plurality of solid-state memories for storing data;
one or more host network Ethernet switches configured to connect to one or more hosts;
at least one pair of storage area network Ethernet switches each configured to connect to one or more solid-state memories of the plurality of solid-state memories; and
a controller configured to:
receive a packet from a host via a host network Ethernet switch of the one or more host network Ethernet switches, the packet including a command to read or write data in a solid-state memory of the plurality of solid-state memories and a header to communicate between the host and the DSD;
change the header in the packet into an internal header to communicate between the controller and the solid-state memory; and
send, via a storage area network Ethernet switch of the at least one pair of storage area network Ethernet switches, an internal command and the internal header to the solid-state memory to perform the command.
2. The DSD of claim 1 , wherein the header is a Non-Volatile Memory express (NVMe) header.
3. The DSD of claim 1 , wherein the internal header includes a command type and a destination address for the solid-state memory.
4. The DSD of claim 1 , wherein each solid-state memory of the plurality of solid-state memories has its own Media Access Control (MAC) address.
5. The DSD of claim 4 , wherein the MAC address for the solid-state memory is included in the internal header and an external MAC address for the DSD is included in the header.
6. The DSD of claim 1 , wherein the controller is further configured to:
determine that an upper threshold has been reached for an amount of data received from one or more hosts in a predetermined period of time; and
return an indication to the host that the upper threshold has been reached.
7. The DSD of claim 1 , wherein the controller is further configured to prioritize performance of the command for a specified quality of service based on a priority indication included in the packet.
8. The DSD of claim 1 , wherein the at least one pair of storage area network Ethernet switches are connected to each other and configured to provide an additional path to the one or more solid-state memories connected to the respective storage area network Ethernet switch of the at least one pair of storage area network Ethernet switches.
9. The DSD of claim 1 , wherein the solid-state memory is configured to:
receive the internal command from the controller;
determine whether a storage area upper threshold has been reached for an amount of data received from at least one of one or more controllers of the DSD and one or more other solid-state memories of the plurality of solid-state memories in a predetermined period of time; and
in response to determining that the storage area upper threshold has been reached, return an indication to the controller that the storage area upper threshold has been reached.
10. The DSD of claim 1 , wherein the solid-state memory is configured to:
receive the internal command from the controller; and
prioritize performance of the internal command in the solid-state memory for a specified quality of service based on a priority indication included with the internal command.
11. The DSD of claim 1 , wherein the controller is further configured to forward the command received from the host to the solid-state memory as the internal command.
12. The DSD of claim 1 , wherein the controller is further configured to:
receive a response from the solid-state memory indicating completion of the internal command;
repackage the response with an external header for a standard used to communicate with the host; and
send the repackaged response to the host to confirm completion of the command.
13. A method of operating a Data Storage Device (DSD), the method comprising:
receiving a packet from a host including a command to read or write data in a solid-state memory of the DSD;
replacing a header in the packet with an internal header used to communicate with the solid-state memory;
sending the command and the internal header to the solid-state memory to perform the command;
determining, by the solid-state memory, whether a storage area upper threshold has been reached for an amount of data received from one of one or more controllers of the DSD and one or more other solid-state memories of the DSD in a predetermined period of time; and
in response to determining that the storage area upper threshold has been reached, returning an indication from the solid-state memory that the storage area upper threshold has been reached.
14. The method of claim 13 , wherein the header is a Non-Volatile Memory express (NVMe) header.
15. The method of claim 13 , further comprising changing at least one of a start frame delimiter and a preamble included in the packet to send to the solid-state memory with the command.
16. The method of claim 13 , wherein the internal header includes a command type and a destination address for the solid-state memory.
17. The method of claim 13 , wherein the internal header includes a Media Access Control (MAC) address for the solid-state memory.
18. The method of claim 13 , further comprising:
receiving a response from the solid-state memory indicating completion of the command;
repackaging the response with an external header for a standard used to communicate with the host; and
sending the repackaged response to the host to confirm completion of the command.
19. A Data Storage Device (DSD), comprising:
a plurality of solid-state memories for storing data; and
means for:
receiving a packet from a host including a command to read or write data in a solid-state memory of the plurality of solid-state memories and a header to communicate between the host and the DSD;
replacing the header in the packet with an internal header to communicate with the solid-state memory;
sending the command and the internal header to the solid-state memory to perform the command;
determining that an upper threshold has been reached for an amount of data received from one or more hosts in a predetermined period of time; and
returning an indication to the host that the upper threshold has been reached.