Method using software for power fail safeguard of caches in disk array

Abstract

The invention provides a method using software for power fail safeguard of caches in a disk array. During power failure of a whole high-end disk array system, cache data in all controllers are written in an appointed disk to guarantee the cache data not to be lost before continuous power supply of a UPS (uninterrupted power supply) is over. The system includes that firstly, a dirt page searching module is connected with a data write-in module to search dirty pages in memory and call the data write-in module to write the data in a rear-end disk; secondly, an IO (input/output) error processing module is connected with the data write-in module to process IO requests which are sent to a rear-end device but do not return; thirdly, a concurrent processing module is used for shielding concurrent write requests in a kernel to enable data in power adjusting states to be written in the rear-end disk by the data write-in module only; fourthly, a metadata organization module is connected with the data write-in module to organize data and inform the data write-in module to write the data in a fixed position of the rear-end disk; and fifthly, the data write-in module is connected with the metadata organization module to write the data at the fixed position of the rear-end disk.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Login to View More

AI Technical Summary

Benefits of technology

This technology makes it easier for people who want something more useful than just having them with one thing at once or on their own. It's designed well but still very compact that can be easily used anywhere they have access through various means like phone lines.

Problems solved by technology

This patented technical solution described in this patents allows multiple servers or devices connected through network cables (RAID) to share resources like memory space without losing any valuable files on their own systems.

Images