DISC

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Another way to look at this would be to say that current tape cartridges contain 800 times the recording surface of a disk drive.
Studies with Suzaku are also fleshing out two proposed sets of structures surrounding black holes: a close-in disk and an outer region of gas.
Instead, they're part of a protoplanetary disk surrounding a young star.
Tim Morris, technical sales manager for TRUMPF Inc.'s Laser Technology Center (www.us.trumpf.com; Plymouth, MI), provides some precision with his analogy: the conventional YAG rod is about 6 mm in diameter and 150-mm long; the disk is about 14 mm in diameter and 0.2 mm-thick.
This technology is significantly different than magnetic disk and tape emulation since the Write Once properties of UDO are inherent to the recording surface of the media and are not a function of software or firmware controls.
These include silicon based dynamic and static random access memory (RAM), magnetic hard disk drives, optical disks (including write once read many [WORM], magneto/optic, CD-ROM, and DVD disk, and magnetic tape.
"There is a huge deployment of 3.5-inch ATA mechanical disks within mission critical applications that need to be upgraded," said Ofer Tsur, M-Systems' marketing manager for FFD products.
The crisis that results from a hard drive failure can be averted by the purchase of a redundant array of inexpensive disks (RAID) subsystem, which can remove a single failure point by spreading the risk of hard disk failure over multiple disks instead of one.
Just as you can't be too thin or too rich, computer hard disks where software applications and data are stored can't be too large or too fast.
Gone are the days when all one needed was one or two 5-1/4- or 3-1/2- inch floppy drives and a handful of disks to work on and store word processing or database files.
Astronomers have confirmed that the nearby star Beta Pictoris has two disks of dust orbiting it, each of which contains debris that's probably the remnants of planet formation.
Systems emerging over the next two years will employ SAS disks for boot drives, local data storage, and external arrays of modest to large size.