June 2015 Archive


RAID
590 views
RAID

CPU performance has been increasing exponentially over the past decade, roughly doubling every 18 months. Not so with disk performance. In the 1970s, average seek times on minicomputer disks were 50 to 100 msec. Now seek times are slightly under 10 msec. In most technical

CD-ROMs
1218 views
CD-ROMs

In recent years, optical (as opposed to magnetic) disks have become available. They have much higher recording densities than conventional magnetic disks. Optical disks were originally developed for recording television programs, but they can be put to more esthetic use as

CD-Recordables
894 views
CD-Recordables

In the beginning, the equipment required to produce a master CD-ROM (or audio CD, for that matter) was very expensive. But as usual in the computer industry, nothing stays expensive for long. By the mid 1990s, CD recorders no bigger than a CD player were a common

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