Block devices are storage devices that allow data to be read and written in fixed-size blocks, typically 512 bytes or 4 KB. They provide random access to data, meaning you can read or write data at any location without having to process the entire device sequentially.
Common Examples of Block Devices:
- Hard Disk Drives (HDDs)
- Solid State Drives (SSDs)
- USB flash drives
- CD/DVD drives
Characteristics:
- Random Access: You can access any block directly.
- Buffering: Data is often buffered to improve performance.
- File Systems: Block devices can be formatted with file systems (e.g., ext4, NTFS) to manage how data is stored and retrieved.
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