Storage system having a controller that selects a die of a solid state disk to store data

A solid state disk, comprising:

• a processor;
• a memory coupled to the processor;
• a communications interface coupled to the processor;
• and
• a plurality of channels,
• wherein the processor and the memory are respectively coupled to a plurality of dies via each of the channels,
• wherein each of the dies comprises a plurality of blocks,
• wherein the processor, the memory, and the communications interface are capable of communicating with each other,
• wherein the communications interface is configured to receive a write request comprising a write address, target data, and a data length of the target data,
• wherein the write address comprises an identifier of a first die, an identifier of a channel coupled to the first die, an identifier of a first segment, and an available offset,
• wherein the memory is configured to store a local mapping table configured to record a mapping relationship between a segment and a physical block address of the solid state disk, and
• wherein the processor is configured to:
• query the local mapping table according to the identifier of the first segment and the available offset comprised in the write address;
• determine a page identifier according to the available offset, and write, based on the data length of the target data and starting from a page corresponding to the page identifier, the target data into a block corresponding to the first segment when the block corresponding to the first segment is recorded in the local mapping table;
• and
• select a blank block from a plurality of blocks of the first die based on the identifier of the channel coupled to the first die and the identifier of the first die, determine the page identifier according to the available offset comprised in the write address, and write, based on the data length of the target data and starting from the page corresponding to the page identifier, the target data into the blank block when the block corresponding to the first segment is not recorded in the local mapping table.

A solid state disk, comprising:

• a processor;
• a memory coupled to the processor;
• a communications interface coupled to the processor;
• and
• a plurality of channels,
• wherein the processor and the memory are respectively coupled to a plurality of dies via each of the channels,
• wherein each of the dies comprises a plurality of blocks,
• wherein the processor, the memory, and the communications interface are capable of communicating with each other,
• wherein the communications interface is configured to receive a write request comprising a write address, target data, and a data length of the target data,
• wherein the write address comprises an identifier of a first segment and an available offset,
• wherein the identifier of the first segment carries an identifier of a first die and an identifier of a channel coupled to the first die,
• wherein the memory is configured to store a local mapping table configured to record a mapping relationship between a segment and a physical block address of the solid state disk, and
• wherein the processor is configured to:
• query the local mapping table according to the identifier of the first segment and the available offset comprised in the write address;
• determine a page identifier according to the available offset, and write, based on the data length of the target data and starting from a page corresponding to the page identifier, the target data into a block corresponding to the first segment when the block corresponding to the first segment is recorded in the local mapping table;
• and
• parse the identifier of the first segment to obtain the identifier of the first die and the identifier of the channel coupled to the first die, select a blank block from a plurality of blocks of the first die based on the identifier of the channel coupled to the first die and the identifier of the first die, determine the page identifier according to the available offset comprised in the write address, and write, based on the data length of the target data and starting from the page corresponding to the page identifier, the target data into the blank block when the block corresponding to the first segment is not recorded in the local mapping table.