QUANTUM DLTtape HANDBOOK
7.7
DA T
QI C-M C
QI C-DC
8mm
Half-inch DLTtape
0
2,000
4,000
6,000
8,000
10,000
DA T
QI C-M C
QI C-DC
8mm
Media Recording
Area (square inches)
Figure 7-6 Half-inch DLTtape Media
leaves plenty of room for
capacity growth for future DLTtape drives. A single DLTtape cartridge has
a tape area of over 10,000 square inches.
tapes (see Figure 7-7). Smaller particle size translates into the ability
to pack more data tracks into the same half-inch wide tape. The
higher-capacity DLTtape IV media also has different magnetic prop-
erties. For example, its “coercivity” rating is 20 percent higher.
Coercivity is a measure of the strength of the magnetic field needed
to change the magnetic orientation of a bit on the tape. The higher
the coercivity, the more magnetic energy it takes to change orienta-
tion, and the less likely it is for a particle to be “flipped” accidentally.
Therefore, higher coercivity means you can pack more data tracks
into the same space, and thus gain more capacity.
Super DLTtape I cartridges use state-of-the-art Advanced Metal
Powder (AMP) media. Designed to meet the needs of multiple
generations of Super DLTtape drives, AMP media ensures the
highest track density available today. AMP uses durable metal
powder technology for recording at very high densities, making
possible a dramatic increase in capacity.
