Linux data recovery to data loss due to write-back caching technology

In the digital world, every day, you can witness a new technological advancement, even beyond the advanced nature of things. ' Cache ' technology is one of the examples designed to improve the efficiency and speed of system performance. Through caching, data can be temporarily stored in virtual memory before being written to disk and can be accessed faster. Sometimes, in a Linux system, caching can cause severe damage to the file system and the data in the affected drive can be lost or inaccessible. This data loss can be counteracted and valuable data can be recovered through techniques such as LINUX data recovery.

problem:

When writing to disk using write-back caching, the system shuts down and then a power surge occurs. This situation is resolved in a serious system error and some data in the drive is lost or inaccessible.

A brief description of the ' cache'

Typically, caching is the process of storing data that has been previously calculated or that is often needed by the system. In addition, if a process triggers the same set of instructions used to transfer data, storing the data or instructions in RAM can significantly improve the performance of the entire process. The data in the cache can be accessed more quickly. There are several caching techniques based on the Write strategy, and the Write-back cache is one of them.

In the case of a write-back cache, data is not immediately mirrored to the storage device, and the cache retains the data until it is completely read. The next step is to find the space for the write and cache tags the same as "dirty" and then eventually write the entire data from the buffer cache.

This caching technology has been implemented in many RAID controllers and is supported by most microprocessors. For non-log file systems, the problem is more rapid, where information is written directly to the file system. If the write process has started but is not completed properly due to any improper shutdown or hardware failure, the cache memory cannot be flushed to the specified location on disk. Therefore, file system corruption results in loss or inaccessibility of the corresponding metadata.

In these cases, the lost data can be recovered from the updated backup. There are still some currently processed data that can never be recovered, because file system corruption needs to be resolved by formatting and new partitioning. Also, if the backup is not available, the situation gets worse, and you don't have any options other than Linux data recovery.

Linux data recovery software has built-in technology developed for file system storage structures that can successfully recover all lost or inaccessible data.

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