17933720. HYBRID LOGICAL TO PHYSICAL MAPPING FOR ZNS BASED SSDS simplified abstract (Western Digital Technologies, Inc.)

HYBRID LOGICAL TO PHYSICAL MAPPING FOR ZNS BASED SSDS

Organization Name

Western Digital Technologies, Inc.

Inventor(s)

Chaitanya Kavirayani of Bangalore (IN)

Vineet Agarwal of Bangalore (IN)

Sampath Raja Murthy of Bangalore (IN)

Aakar Deora of Bangalore (IN)

Varun Singh of Delhi (IN)

HYBRID LOGICAL TO PHYSICAL MAPPING FOR ZNS BASED SSDS - A simplified explanation of the abstract

This abstract first appeared for US patent application 17933720 titled 'HYBRID LOGICAL TO PHYSICAL MAPPING FOR ZNS BASED SSDS

Simplified Explanation

The abstract of the patent application describes a storage device that efficiently handles host commands associated with active and inactive zones using a hybrid L2P mapping system. The device includes a NVM, a controller, a first volatile memory, and a second volatile memory. The controller allocates superblocks in the NVM, stores L2P address mappings for active zones, and refrains from storing mappings for inactive zones, instead storing them in a superblock mapping table.

• The storage device includes a NVM, a controller, and volatile memories for efficient handling of host commands.
• The controller allocates superblocks in the NVM and stores L2P address mappings for active zones.
• Inactive zone mappings are stored in a superblock mapping table, reducing L2P mapping table sizes.
• This system improves zone read, reset, and TTR performance, as well as reducing WAF.

Potential Applications

The technology described in this patent application could be applied in:

• Solid-state drives
• Data centers
• Cloud storage systems

Problems Solved

This technology addresses the following issues:

• Efficient handling of host commands associated with active and inactive zones
• Reduction of L2P mapping table sizes
• Improved zone read, reset, and TTR performance
• Reduced write amplification factor (WAF)

Benefits

The benefits of this technology include:

• Increased performance in handling host commands
• Reduction in storage device overhead
• Improved overall storage efficiency

Potential Commercial Applications

A potential commercial application for this technology could be in:

• Enterprise storage solutions
• High-performance computing systems
• Data storage and management services

Possible Prior Art

One possible prior art for this technology could be:

• Previous storage devices that handle host commands for active and inactive zones separately.

Unanswered Questions

How does this technology compare to existing solutions in terms of performance and efficiency?

The article does not provide a direct comparison with existing solutions in the market.

Are there any potential limitations or drawbacks to implementing this technology in real-world storage systems?

The article does not address any potential limitations or drawbacks that may arise from implementing this technology.

Original Abstract Submitted

Aspects of a storage device are provided that handle host commands associated with active and inactive zones using a hybrid L2P mapping system. The storage device includes a NVM, a controller, a first volatile memory and a second volatile memory. The controller allocates, as a superblock, one or more physical blocks respectively in one or more memory dies of the NVM, receives write commands including logical addresses associated with active zones, and stores in an L2P mapping table L2P address mappings of these logical addresses to physical addresses associated with either volatile memory or the superblock. The controller refrains from storing L2P address mappings for inactive zones, instead storing in a superblock mapping table a mapping of superblocks to inactive zones in response to respective zone finish commands. As a result, L2P mapping table sizes are reduced, zone read, reset, and TTR performance are increased, and reduced WAF is achieved.