Components

Edit online

The chassis consists of a sheet metal enclosure assembly with an integrated midplane PCB, module runner system, and two drawers for drive modules.

The chassis has a 19-inch rack mounting that enables it to be installed on to standard 19-inch racks and uses 5 EIA units of rack space (8.75 inches (222 mm)).

Each drawer contains 42 bays for Disk Drives in Carriers (DDICs). DDICs are top-mounted into the drawers.

At the rear, the chassis assembly can accept two PSUs (or one PSU + one PSU blank), one SBB compute module and SBB module blank, and five cooling modules.

Drawers

Each drawer contains 42 slots, each of which accepts a single DDIC containing a 3.5” drive.

Opening a drawer does not interrupt the functioning of the system, and DDICs can be hotswapped while the enclosure continues to operate. However, drawers must not be left open for longer than 2 minutes, otherwise airflow and cooling are compromised.

The drawer is designed to support its own weight, plus the weight of any drives, when fully open.

The following safety features are included:
  • To reduce the possibility of toppling, only one drawer can be open at any one time.
  • The drawer locks into place when opened all the way. To reduce pinching hazards, two latches must be released before the drawer can be pushed back in.

Data is sent via three baseplanes and a single sideplane that is mounted on the left side of the drawer, with no redundant path available. Power is sent via three baseplanes and two sideplanes, the sideplanes ensures a redundant power path to each drive. The right sidpelane provides power to the drives and does not provide a data path.

Each drawer is locked shut by turning both anti-tamper locks clockwise. Use a screwdriver with a Torx T20 bit (see Figure 1). Each side of each drawer has a series of status LEDs, shown in the following figure.

Figure 1. Drawer LEDs (left side only)
Diagram shows indicators with callouts
Important: During normal operation, drawers must be kept shut to ensure correct airflow and cooling.

Disk drives in carriers (DDICs)

Each drive is housed in a carrier that enables secure insertion of the drive into the drawer and contains a SAS carrier transition card (used with direct dock SATA).

Figure 2. A disk drive in carrier (DDIC)
The diagram shows latches, the LED, and the dongle.
The following hard disk drives are supported:
  • 3.5” 7200 rpm SATA drive

The drive carrier has a single amber LED that is lit when the drive has a fault.

Operator’s panel

Figure 3. Enclosure operator’s panel
Diagram of operator LEDs
The left front of the enclosure features an operator’s (ops) panel (shown in previous figure). The panel contains the following indicators:
Unit Identification Display
A numerical display whose primary function is to display the enclosure unit identification number. It can be helpful when setting up and maintaining multiple enclosure systems.
However, a VPD (Vital Product Data) option allows the unit identification display to be configured for other purposes. The display is on by default and displays a value of 0. See "Unit Identification Number".
Mute/Input button
Used to set the unit identification display. See "How To Set the Unit Identification Number".
Power On/Standby LED (green/amber)
Shows amber when the system is in standby (not operational). Shows green when the system is on (operational).
Module Fault LED (amber)
Shows amber when a system hardware fault exists. Additionally, an LED might be lit on a PSU, drawer, DDIC, cooling module, or compute module that helps you identify which component is at fault.
Logical Status LED (amber)
Indicates a change of status or fault from something other than the Enclosure Management (EM) system. It is usually associated with a disk drive and LEDs at each disk drive position help you identify the drive that is affected.
Drawer 1 Fault LED (amber)
Indicates a drive, cable, or sideplane fault in drawer 1.
Drawer 2 Fault LED (amber)
Indicates a drive, cable, or sideplane fault in drawer 2.

The ops panel is a part of the chassis, and is not replaceable on site.