Storage device for autonomous vehicle and data storing method thereof

A method of a storage device, comprising:

• receiving, from a host, a write command and accident data comprising a risk tag;
• determining an accident risk level based on the risk tag, wherein the accident risk level corresponds to at least one of a first accident risk level corresponding to a high accident risk, a second accident risk level corresponding to an accident risk lower than the first accident risk level, and a third accident risk level corresponding to an accident risk lower than the second accident risk level;
• selecting a storage method for storing the accident data on a memory based on the accident risk level;
• and
• storing the accident data on the memory based on the selected storage method.

A storage device configured to store accident data, comprising:

• a first memory;
• a buffer memory on which the accident data and metadata of the accident data are stored;
• and
• a storage controller configured to receive the accident data and an accident risk tag corresponding to the accident data,
• wherein the storage controller comprises:
• a tag analyzer configured to extract an accident risk level corresponding to the accident risk tag;
• a storage manager configured to select a storage method for storing the accident data on the first memory based on the extracted accident risk level;
• and
• a namespace table configured a namespace address of the first memory in which the accident data is stored, and
• wherein the accident risk tag corresponds to at least one of a first accident risk level corresponding to a high accident risk, a second accident risk level corresponding to an accident risk lower than the first accident risk level, and a third accident risk level corresponding to an accident risk lower than the second accident risk level.