Larry Bles, Apple-products manager and service technician at Micro Products, of Springfield, Virginia . . . When the screws loosen, they cause more pressure on other parts of the PowerBook, and this pressure can lead to a broken cover. To prevent the problem, you must carefully remove a part or two and tighten these screws every six months or so. PowerBook 500 users equipped with only a Swiss-army knife and more thumbs than the good Lord intended should heed Larry's call to get thy PowerBook to an authorized repair shop. Because you're supporting us through your subscription dollars and you asked so nicely, we'll tell you.
RAID is an acronym for redundant array of independent disks.
In other words, a RAID or disk array is a collection of separate hard drives that are ganged together to operate as a single, virtual hard drive. When using a RAID, you don't see icons for each one of the disks on the desktop but rather a single icon that represents the array. That's because in a RAID, the data is split up among multiple disks. The array is faster than a single drive because the drives share the work of reading data. The data is also safer because at least one of the drives holds parity information, an extra copy of the original data.