Drive Orientation; Cooling; Drive Mounting - Seagate ST11200N Product Manual

32
______________________________________________________________________________________
7.6.1

Drive Orientation

The balanced rotary arm actuator design of the drive allows it to be mounted in any orientation. All drive
performance characterization, however, has been done with the drive in horizontal (discs level) and vertical
(drive on its side) orientations, and these are the two preferred mounting orientations.
7.6.2

Cooling

Cabinet cooling must be designed by the customer so that the ambient temperature immediately surround-
ing the drive will not exceed temperature conditions specified in 7.4.1. Specific consideration should be
given to make sure adequate air circulation is present around the PCBs to meet the requirements of 7.4.1.
7.6.3

Drive Mounting

When mounting the drive using the bottom holes care must be taken to ensure that the drive is not physi-
cally distorted due to a stiff non-flat mounting surface. The allowable mounting surface stiffness is 80 lb/in.
The following equation and paragraph define the allowable mounting surface stiffness:
where 'k' represents the mounting surface stiffness (units of lb/in), and, 'x' represents the out-of plane
mounting surface distortion (units of inches). The out-of plane distortion ('x') is determined by defining a
plane with three of the four mounting points fixed and evaluating the out-of plane deflection of the fourth
mounting point when a known force is applied to the fourth point.
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
k*x = 80 lb