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12 ST11950 and ST12550 Installation Guide, Rev. D
General description
Barracuda 1 and 2 SCSI disc drives are high-speed,
random-access digital-data storage devices. The
ST11950N/ND and ST12550N/ND drives are illustrated
in Figure 1, and the ST11950W/WD and ST12550W/WD
drives are illustrated in Figure 2. Specifications and DC
power requirements for the drive are listed in tables
following the figure.
The drive is a component for installation in an enclosure
designed for the drive. This is often a rack within the
system or an external enclosure designed to house one
or more disc drives or other peripheral units. In either
case, the disc drive must receive adequate cooling (refer
to “Providing adequate cooling”) and it must be suffi-
ciently grounded and shielded from emissions. The
Barracuda 1 and 2 Product Manual
(part number
83327780) contains guidelines for a properly designed
enclosure.