Instruction manual

Safety Notices
For a translation of the danger and caution notices contained in this book, see
“Appendix B. Translated Safety Notices” on page 83.
Definitions of Safety Notices
A danger notice indicates the presence of a hazard that has the potential of causing
death or serious injury.
A danger notice appears on page 50.
A caution notice indicates the presence of a hazard that has the potential of causing
moderate or minor personal injury.
Caution notices appear on pages 47, 49, 58, 67, 69, and 76.
An attention notice indicates an action that could cause damage to a program, device,
system, or data.
Acoustic Noise Declaration
The equivalent continuous A-weighted sound pressure level at the bystander’s position
measured for a 2104 Model DU3 or TU3 does not exceed 68 dB(A). This level has
been measured under the following conditions:
v Rack-mounted unit:
– The 2104 Model DU3 had fourteen disk drive modules installed.
– The 2104 Model DU3 was installed in a 7202 Rack with the bottom of the 2104
Model DU3 system at EIA position 17.
– The remainder of the rack was filled with units to which power was not connected.
v Deskside unit:
– The 2104 Model TU3 had fourteen disk drive modules installed.
These levels were measured using a procedure in accordance with ISO standard
DIS7779, Measurement of Airborne Noise Emitted by Computer and Business
Equipment. The equipment was installed and operated as described in Appendix C.8 of
that standard.
ix