In this chapter, we’ll discuss in detail how to work with disks on a Linux system. You’ll learn how to partition disks, create and maintain the filesystems that go inside disk partitions, and work with swap space. 在第三章中,我们讨论了内核提供的一些顶层磁盘设备。 在本章中,我们将...
In other words, armed with evidence about how and where this disk of hot star matter was moving, combined with a good idea of the black hole's mass, Pasham said his team "teased out" the black hole's spin. It spins at about half the speed of light. Researchers have calculated black...
reading and writing data as needed. this process is accomplished by utilizing magnetism to write and read data on the disk's surface. as the disk spins, the head reads or writes data in small sections called sectors, which are then pieced together to form larger files. why do computers ne...
rpm refers to how fast the platter spins. higher rpm results in faster data access times because the read/write heads can reach the desired data location more quickly. what are the benefits of platter-based hard drives? platter-based hard drives are cost-effective and provide high storage ...
The transmission has different gears— or speeds— to control how fast the wheels turn. As the wheels turn, they cause the car to move. To measure the speed of a car, one must be able to measure the rotational speed of either the wheels or the transmission and send that information to...
The hard-disk platter is then polished to mirror-type smoothness. With a tape, you have to fast-forward or reverse to get to any particular point on the tape. This can take several minutes with a long tape. On a hard disk, you can move to any point on the surface of the disk ...
In computers, a solid-state drive can be used as a storage device, replacing the traditional hard disk drive. In fact, manufacturers produce SSDs with shapes and footprints that resemble HDDs so the two technologies can be used interchangeably. But that's where the similarities end. If you ...
a massive cloud of dust and hydrogen gas. The force of some major event, like asupernova, caused the gas to begin to collapse inward, and eventually, this cloud flattened into a disk shape and began to slowly spin, with the Sun gradually forming as a lump in the center of the spiral...
Fast forward to today, whether you wish to engage website visitors or boost conversions, you can design a wheel for that. But, do these popups really work? Definitely! They are exciting, they gamify the user experience, and increase the chances of visitors making a purchase or signing up ...
A TBM boring head showing the disk cutters Tunneling through soft rock and tunneling underground require different approaches. Blasting in soft, firm rock such as shale or limestone is difficult to control. Instead, engineers usetunnel-boring machines (TBMs), ormoles, to create the tunnel. TBMs ...