What is a "Block Device"? The Most Authoritative Explanation.
What is block device in Linux?
Block devices are characterized by random access to data organized in fixed-size blocks. Examples of such devices are hard drives, CD-ROM drives, RAM disks, etc. … To simplify work with block devices, the Linux kernel provides an entire subsystem called the block I/O (or block layer) subsystem. What is block device and character device in Linux?What is the difference between character devices and block devices?
For character devices, the driver sends/receives single bytes. For block devices, communication is in entire blocks. For example, hard disk or NVMe drivers can present the disk contents for read/write access via device node /dev/sda, and we can imagine the block device as representing the disk as a long lineup of bytes.What is the difference between a file and a block device?
Block devices commonly represent hardware such as disk drives, but that is platform-dependent. FreeBSD doesn't have any block devices at all, for example. Files, in general, are not devices. "Block device", as thrown around referring to files, refers to the particular device files in (probably) /dev.How do I block a device?
Block a device Sign in to your Google Admin console. From the Admin console Home page, go to Devices. Choose an option: For Android, iOS, and Google Sync devices, click Mobile devices. Locate the device in the list and click its name. Click Block.
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