What Does WB Mean
In computing, WB (WriteBack) is a storage area on a hard disk drive used to store data written to the disk but not yet permanently stored there. The data in a WB area is not erased when the computer is turned off. This term is also used to describe a type of cache memory.
When you save a document on your computer, the information is usually stored in primary storage, which is located in the computer’s RAM. When the RAM starts to fill up, the operating system will begin moving some of the older data from primary storage to secondary storage, which can include your computer’s hard drive.
The WriteBack feature tells your computer to store some of this data in a separate area on the hard drive instead of just erasing it. This means that if your computer crashes or you accidentally turn it off, you may still be able to recover some of the data that you thought was gone.
The downside to WriteBack is that it takes up extra space on your hard drive and can slow down your computer’s performance. For this reason, most computers don’t use WriteBack unless there’s not enough RAM available to store all of the data.
Some newer laptops come with a “hybrid” hard drive that includes traditional storage and a WB area. This allows the computer to start up more quickly since the operating system can access the data in the WB area without having to load it from the hard drive. When you shut down your computer, this data is written to the hard drive so that it’s there when you start up again.
A type of caching system where a modified version of the information is copied back to a faster medium before being replaced with a new value. For example, if an application changes some data on disk, that modified version will be copied into memory with reading/Write Back caching before the change is committed to disk. This improves I/O performance by reducing the number of actual disk operations required for typical workloads.
Contrast this with a system where the application writes to disk and the operating system reads from disk; in this case, the operating system would have to read the original data, modify it, and write it back to disk.
There are two types of Write Back caching:
write-through and write-back caching. Once an I/O request is made in write-through caching, the cache immediately updates both the supply and primary storage. This ensures that if there’s a problem with the store (such as a power failure), the data will still be available in primary storage. However, write-through caches can also cause performance problems because they can delay or block updates to primary storage.
The cache updates only the stock in write-back caching, not primary storage. This can improve performance because it allows updates to the primary storage to happen in parallel with the cached updates. However, if there’s a problem with the cache (such as a power failure), the data may be lost.
Cache:- A portion of memory used to store recently accessed data so that it can be accessed more quickly. The purpose of a supply is to reduce the number of times that the data has to be read from or written to disk, improving performance. There are two types of caches: write-through caches and write-back caches.
Once an I/O request is made in write-through caching, the stock immediately updates both the store and primary storage. This ensures that if there’s a problem with the cache (such as a power failure), the data will still be available in primary storage. However, write-through stores can also cause performance problems because they can delay or block updates to primary storage.