RECONSTRUCT DRIVE FOR DYNAMIC RESIZING

• US 20170371780A1
• Filed: 09/08/2017
• Published: 12/28/2017
• Est. Priority Date: 10/28/2014
• Status: Abandoned Application

• Current Assignee: Toshiba Memory Corporation (Kioxia Corporation)
• Original Assignee: Toshiba Memory Corporation (Kioxia Corporation)
• Inventors: HASHIMOTO, Daisuke
• Application Number:
  US15/699,972
• Publication Number:
  US 20170371780A1
• Time in Patent Office: Days
• CPC Class Codes: G06F 12/0246 in block erasable memory, e.g. flash memory
• CPC Class Codes: G06F 2212/1016 Performance improvement
• CPC Class Codes: G06F 2212/7204 Capacity control, e.g. partitioning, end-of-life degradation
• CPC Class Codes: G06F 2212/7205 Cleaning, compaction, garbage collection, erase control
• CPC Class Codes: G11C 29/76 using address translation or modifications
• CPC Class Codes: G11C 29/883 using a single defective memory device with reduced capacity, e.g. half capacity

Abstract

A solid-state drive (SSD) is configured for dynamic resizing. When the SSD approaches the end of its useful life because the over-provisioning amount is nearing the minimum threshold as a result of an increasing number of bad blocks, the SSD is reformatted with a reduced logical capacity so that the over-provisioning amount may be maintained above the minimum threshold.

Claims

1. A non-transitory computer readable medium comprising instructions that are executable in a computer, wherein the instructions, when executed in the computer, cause the computer to perform the steps of:

determining an extra usable capacity of a storage device connected to the computer;

determining that the extra usable capacity is less than a threshold;

issuing a command to the storage device to reduce a logical capacity thereof; and

receiving an acknowledgement from the storage device that the command has been executed, the acknowledgement indicating a reduced logical capacity of the storage device.