Storage system, method, and apparatus for processing operation request

A method for processing an operation request, comprising:

• a controller communicating with a disk enclosure using an Ethernet network, the controller comprising a central processing unit and a back-end adapter, wherein the disk enclosure and the back-end adapter each have a media access control (MAC) address and wherein multiple disks are connected in the disk enclosure, with each disk in the disk enclosure configured to communicate using a Serial Attached Small Computer System Interface (SAS) protocol;
• the central processing unit sending a Small Computer System Interface (SCSI) protocol operation request, wherein the SCSI protocol operation request includes a SAS protocol address of a target disk;
• the back-end adapter receiving the SCSI protocol operation request sent by the central processing unit;
• the back-end adapter obtaining the MAC address of the disk enclosure according to the SAS protocol address of the target disk to obtain the MAC address of the disk enclosure;
• the back-end adapter encapsulating the SCSI protocol operation request into an Ethernet operation request packet carrying the MAC address of the back-end adapter and the MAC address of the disk enclosure;
• and
• the back-end adapter sending the Ethernet operation request packet to the disk enclosure according to the MAC address of the disk enclosure.

A back-end adapter of a controller of a storage system, wherein the back-end adapter communicates with a disk enclosure of the storage system using an Ethernet network, with the back-end adapter comprising:

• a first interface configured to receive a Small Computer System Interface (SCSI) protocol operation request, wherein the SCSI protocol operation request includes a Serial Attached Small Computer System Interface (SAS) protocol address of a target disk, with multiple disks being connected in the disk enclosure and with each disk in the disk enclosure configured to communicate using the SAS protocol;
• a second interface configured to send a Ethernet operation request packet to a disk enclosure of the storage system according to a MAC address of the disk enclosure, wherein the disk enclosure and the back-end adapter each have a media access control (MAC) address;
• and
• a first central processing unit coupled to the first interface and the second interface, with the first central processing unit configured to:
• obtain the MAC address of the disk enclosure according to the SAS protocol address of the target disk;
• and
• encapsulate the SCSI protocol operation request into the Ethernet operation request packet, wherein the Ethernet operation request packet includes the MAC address of the back-end adapter and the MAC address of the disk enclosure.