This chapter describes the functional and physical components of the D-brick2 in the following sections:
For troubleshooting and additional detailed information on the D-brick2, see SGI Total Performance 9100 (2Gb TP9100) Storage System User's Guide (P/N 007-4522-00x), which is available online at http://docs.sgi.com. For information on how to power on and power off the D-brick2, see Chapter 1, “Operation Procedures”. For information on how to replace disk drive modules in the D-brick2, see Chapter 14, “Maintenance and Upgrade Procedures”.
 | Note: If you require RAID storage, ask your SGI sales representative about SGI RAID storage products, such as the SGI 2Gb TP9100 and SGI TP9500 storage systems. |
The D-brick2 module is a high performance, large-scale storage system that provides compact, high-capacity JBOD (just a bunch of disks) storage for your Origin 3900 server. Each enclosure contains a minimum of 2 and maximum of 16 disk drives, and the component modules that handle I/O, power, cooling, and operations. RAID storage systems are available for your system through your SGI sales representative.
The modular design of the D-brick2 expands easily to meet your mass storage needs. It has the following features:
Maximum configuration of up to 96 drives (six D-brick2 units)
1x16 (more storage) and 2x8 (more bandwidth) disk topologies in each brick
Dual power feeds with dual power supplies
Redundant cooling
Non-disruptive component replacement
Enclosure services interface (ESI) for SCSI enclosure services (SES)
Each D-brick2 is connected to one or more Fibre Channel boards (host bus adapters, or HBAs) in the Origin 3900 server, either separately or in a combination (loop).
| Note: The standard configuration for the D-Brick2 is 1 x 16. The D-brick2 can be reconfigured to 2 x 8 on site. |
This section describes the external components located on the front and rear panels of the D-brick2.
The front of the D-brick2 consists of drive carrier modules or dummy drive modules (see Figure 11-1). The disk drive carrier module consists of a hard disk drive mounted in a die-cast aluminum carrier (see Figure 11-2). The carrier protects the disk drive from radio frequency interference, electromagnetic induction, and physical damage. It also provides a means for thermal conduction.
Dummy drive carrier modules must be installed in all unused drive bays. Figure 11-2 provides an illustration of this module.
A key (Torx screwdriver), which locks or unlocks the disk drives, is provided with each D–brick2. A red indicator is visible in the center rectangular aperture in the handle if the anti-tamper lock is locked, and a black indicator is visible when the lock is unlocked (see Figure 11-3).
The rear of the D-brick2 consists of the components that are discussed in the following subsections (see Figure 11-4):
Two power supply/cooling modules (PSUs), which are mounted in the rear of the D-brick2, supply redundant cooling and power to the enclosure. Voltage operating ranges are nominally 115 V or 230 VAC, and are selected automatically. The supplies should be plugged into your SGI rack's power distribution strip (PDS). Four LEDs located on the rear panel of the PSU/cooling module indicate the status of the power supply and the fans (see Figure 11-5).
| Note: If a power supply fails, do not remove it from the enclosure until you have a replacement power supply. The cooling fans in the supply will continue to operate. |
 | Caution: You must install a new PSU/cooling module within 10 minutes after removing a faulty one. Otherwise, thermal overload of the D-brick2 can result. |
The operator's panel (ops panel) contains LEDs that show the status of all modules. The enclosure services processor, located on the LRC modules, control the status LEDs. Also on the operators panel is an audible alarm that indicates a fault state is present, a push-button alarm mute switch, and a thumbwheel enclosure ID address range selector switch. When the D-brick2 is powered on, the audible alarm sounds for one second, and the power-on LED illuminates.
Figure 11-6 identifies all controls and indicators on the ops panel. Note that the operator's panel configuration switches slide left for “on” and right for “off.” For detailed descriptions of the LEDs and configuration switch information, see Chapter 5 in the SGI Total Performance 9100 (2Gb TP9100) Storage System User's Guide (P/N 007-4522-00x).
| Note: The valid range for the address switch is 1 through 6. Zero is not valid. |
The D-brick2 uses a Fibre Channel arbitrated loop (FC-AL) to interface with your Origin 3900 server. The FC-AL backplane incorporates two independent loops formed by port bypass circuits within the LRC modules.
The enclosure services processor housed on the LRC modules manages the enclosure and provides an interface to devices on the backplane, a PSU/cooling module, and an ops panel to monitor internal functions. These processors operate in a master/slave configuration to allow failover. See the SGI Total Performance 9100 (2Gb TP9100) Storage System User's Guide (P/N 007-4522-00x) for details.
| Note: The LRC module can address up to 96 disk drives; a maximum of six enclosures can be cabled together. |
The enclosure may be configured with either one or two LRC I/O modules (see Figure 11-7). If only one module is installed, an I/O blank module must be installed in the unused bay.
Table 11-1 lists the physical specifications of the D-brick2.
Table 11-1. D-brick2 Physical Specifications
Characteristic | Specification |
|---|---|
Height | 13.4 cm (5.3 in.) |
Width | 44.6 cm (17.5 in.) |
Depth | 50 cm (19.7 in.) |
Weight: |
|
Fully populated enclosure | 32.3 kg (71 lb) |
Empty enclosure | 17.9 kg (39.4 lb) |
Power supply/cooling module | 3.6 kg (7.9 lb) |
Disk carrier module with drive | 0.88 kg (1.9 lb) |
LRC module | 1.2 kg (2.6 lb) |
Table 11-2 shows the power requirements and specifications of the D-brick2.
Table 11-2. D-brick2 Power Specifications
Specification | Value |
|---|---|
Voltage range for rack | 200-240 VAC |
Voltage range selection | Automatic |
Frequency | 50-60 Hz |
Power factor | >0.98 |
Maximum power consumption | 700 VA |
Typical power consumption | 400 VA or less |
Inrush current (25 °C [77 °F] cold-start 1 PSU) | 100 A maximum peak for 4 ms, 25 A thereafter at maximum voltage |
Harmonics | Meets EN61000-3-2 |
Power cord: |
|
Table 11-3 provides temperature and humidity requirements for the D-brick2.
Table 11-3. D-brick2 Ambient Temperature and Humidity Requirements
Factor | Temperature | Relative Humidity | Maximum Wet Bulb |
|---|---|---|---|
Operating temperature | 5 °C to 40 °C | 20% to 80% noncondensing | 23 °C |
Non-operating temperature | 0 °C to 50 °C | 8% to 80% noncondensing | 27 °C |
Storage temperature | 1 °C to 60 °C | 8% to 80% noncondensing | 29 °C |
Shipping temperature | -40 °C to +60 °C | 5% to 100% nonprecipitating | 29 °C |
Table 11-4 provides additional environmental specifications for the D-brick2.
Table 11-4. D-brick2 Environmental Requirements
Environmental Factor | Requirement |
|---|---|
Altitude, operating | 0 to 3047 m (0 to 10,000 ft) |
Altitude, non-operating | -305 to 12,192 m (-1000 to 40,000 ft) |
Shock, operating | Vertical axis 5 g peak 1/2 sine, 10 ms |
Shock, non-operating | 30 g 10 ms 1/2 sine |
Vibration, operating | 0.21 grms 5-500 Hz random |
Vibration, non-operating | 1.04 grms 2-200 Hz random |
Acoustics | Less than 6.0 B LwA operating at 20 °C |
Safety and approvals | CE, UL, cUL |
EMC | EN55022 (CISPR22-A), EN55024 (CISPR24), FCC-A |