The 1949 series cable is an
enhanced IDE dual-drive cable, also
called Ultra ATA TPE or Ultra ATA-133.
It is designed for high-speed IDE
data traffic between one controller
card (or motherboard) and up to two storage devices, usually
IDE hard drives or IDE optical drives (CD or DVD).
Unlike the classic flat "ribbon" cables, this rounded cable minimizes
clutter and allows air circulation, vastly improving
the operating environment for your computer's internal components
and extending the lifespan of your rig. If you
currently have flat ribbon cable in your
machine, upgrading to rounded cables is imperative.
This cable is only for older, IDE-style drives; most drives
of this type were manufactured before 2006-2008, when
IDE's replacement format SATA began to claim and dominate
the hard drive market. Any modern computer equipment will
use a SATA drive cable instead.