Solid state disk write fault treatment method and system

Abstract

The invention discloses a solid state disk write fault processing method and system. The method comprises the steps that when an NAND Flash receives write requests of a target RAID strip, a write operation is executed; if the write operation fails, whether or not rewrite markers of all hosts write requests in the RAID strip are set is inspected in sequence; if yes, data corresponding to all the hosts write requests is discarded. The write-in process of the target RAID strip comprises the steps that 11, when the hosts write requests are received, whether or not old PBA values of an LBA corresponding to the hosts requests are within a maximum PBA value and a minimum PBA value of the RAID strip is queried; 12, if yes, the hosts requests are set with rewrite markers; 13, if not, new PBA valuesare distributed to the LBA; 14, the step 11 is executed again till the RAID strip is filled up. By adopting the solid state disk write fault processing method, it can be guaranteed that invalid datais directly discarded when the RAID strip fails in writing-in of the NAND Flash, and thus the storage efficiency of a solid state disk is guaranteed.

Description

technical field [0001] The invention relates to the field of computer communication, in particular to a method and system for processing write failure of a solid-state hard disk. Background technique [0002] With the continuous enhancement of computer data processing capabilities, the reading and writing speed of hard disks can no longer meet the needs of large amounts of data reading and writing. Solid State Drives (SSD) are hard disks made of solid-state electronic memory chip arrays. Composed of storage units, it is widely used in military, vehicle, industrial control, video surveillance, network monitoring, medical, aviation and navigation equipment and other fields. [0003] Disk array (Redundant Arrays of Independent Disk, RAID) greatly improves the data throughput of the storage system because it can store and read data at the same time. , Simple implementation, strong fault tolerance and other advantages, it has been widely used in network servers. Among the many g...

AI Technical Summary

Problems solved by technology

In practice, enterprise-level SSDs are required to provide complete data protection functions. However, when using the RAID solution, when data is written to the SSD, the data will be written into the NAND Flash in the form of an entire strip, and a part of the data will be written into the SSD. Invalid data occupies a large amount of storage space of the solid-state hard disk. Therefore, how to make better use of the storage space of the solid-state hard disk is a problem to be solved urgently by those skilled in the art.

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