User Manual

Constellation.2 SAS Product Manual, Rev. K 54
10.0 Installation
Constellation®.2 disk drive installation is a plug-and-play process. There are no jumpers, switches, or terminators on
the drive.
SAS drives are designed to be used in a host system that provides a SAS-compatible backplane with bays designed to
accommodate the drive. In such systems, the host system typically provides a carrier or tray into which you need to
mount the drive. Mount the drive to the carrier or tray provided by the host system using four M3 x 0.5 metric screws.
When tightening the screws, use a maximum torque of 4.5 in-lb +/- 0.45 in-lb. Do not over-tighten or force the screws.
You can mount the drive in any orientation.
Note. SAS drives are designed to be attached to the host system without I/O or power cables. If you intend the
use the drive in a non-backplane host system, connecting the drive using high-quality cables is accept
-
able as long as the I/O cable length does not exceed 4 meters (13.1 feet).
Slide the carrier or tray into the appropriate bay in your host system using the instructions provided by the host sys-
tem. This connects the drive directly to your system’s SAS connector. The SAS connector is normally located on a SAS
backpanel. See Section 11.4.1 for additional information about these connectors.
Power is supplied through the SAS connector.
The drive is shipped from the factory low-level formatted in 512-byte logical blocks. You need to reformat the drive
only if you want to select a different logical block size.
Figure 11. Physical interface
10.1 Drive orientation
The drive may be mounted in any orientation. All drive performance characterizations, however, have been done with
the drive in horizontal (discs level) and vertical (drive on its side) orientations, which are the two preferred mounting
orientations.