SAS expansion enclosure environment requirements

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Before you install a 2U or a 5U SAS expansion enclosure, your physical environment must meet certain requirements. This includes verifying that adequate space is available and that requirements for power and environmental conditions are met. (SAS expansion enclosures are not supported by SAN Volume Controller 2145-SV2 or 2145-SA2 nodes.)

Power requirements for each power supply (two per enclosure)

Ensure that your environment meets the following power requirements.

To aid in power and cooling requirements planning, Table 1 lists the rating of each power supply unit (PSU) by enclosure.

The power that is used by the system depends on several factors, including the number of enclosures and drives in the system and the ambient temperature.

Table 1. Power specifications per power supply
Model and type PSU Input power requirements Maximum input current Maximum power output Caloric value (BTU/hr)

  2145-12F
  
  
  
  
  
  
  
  
2145-24F
  
  
  
  
  
  
  
  
  
 764 W (2)

100 V to 240 V single phase AC at a frequency of 50 Hz to 60 Hz

 10A for 100V

6A for 240V

 764W 2607

2145-92F





,

2147-92F








 2400 W (2)

AC 200-240 V~ ,
(nominal; +/- 10% tolerant)

50/60 Hz
(nominal; 47-63 Hz tolerant)

12 A (x2 - per inlet redundancy)

Requires an IEC C20 appliance coupler (16-20A branch circuit or C19 power socket PDU)

 2400W 8189
Note: One or more C19 power distribution units (PDU) are needed in the rack to connect power to 92F power supplies.
The power and thermal measurements that are shown in Table 2 were obtained in the specific operating environment and under the conditions described. These measurements are presented as an illustration; measurements that are obtained in other operating environments might vary. Conduct your own testing to determine specific measurements for your environment.
Table 2. Power consumption examples per enclosure
Model and type Configuration Total power consumption
2145-12F 1 enclosure with 12 7.2 K RPM nearline SAS Drives 175 W
2145-24F 1 enclosure with 24 2.5-inch flash drives 151 W
2145-24F 1 enclosure with 24 10 K SAS drives 175 W
2145-24F 1 enclosure with 24 15 K SAS drives 234 W
2145-24F 1 enclosure with 12 7.2 K nearline SAS drives 158 W
2147-92F 1 enclosure with 92 10 TB nearline SAS drives 848 W
2147-92F 1 enclosure with 92 15 TB tier 1 flash drives 748 W

Each SAS expansion enclosure contains two PSUs for redundancy. The total power consumption values represent the total power that is drawn by both PSUs.

Environmental requirements

System airflow is from the front to the rear of each enclosure.
  • Airflow passes between drive carriers and through each enclosure.
  • Airflow for the upper 4U of the 5U enclosure enters the front, passes between the disk drives, and exits through the large fans in the rear of the enclosure.
  • Airflow for the lower 1U of the 5U enclosure is driven through the power supplies via 40mm X 56mm fans. Air continues through the chassis cooling the ESMs or controllers and exits the rear of the enclosure.
  • The combined power and cooling module exhausts air from the rear of each canister.
Ensure that your environment falls within the ranges that are shown in Table 3.
Table 3. Temperature requirements
Environment Ambient temperature Altitude Relative humidity Maximum wet bulb temperature
Operating 5°C to 35°C (5°C to 40°C for 12F/24F)
41°F to 95°F
(41°F to 104°F for 12F/24F)		 0 - 2133 m
(0 - 7000 ft)		 8% to 80% noncondensing 23°C (73°F)
5°C to 30°C
(41°F to 86°F)		 2134 - 3048 m
(7001 - 10000 ft)
Non-operating 1°C to 50°C
(34°F to 122°F)		 -305 to 12192 m
(-1000 to 40000 ft)		 8% to 80% noncondensing 27°C (80°F)
Storage 1°C to 60°C
(34°F to 140°F)		 5% to 80% noncondensing 29°C (84°F)
Shipping -40°C to 60°C
(-40°F to 140°F)		 5% to 100% condensing, but not precipitating

Dimensions and weight

Ensure that space is available in a rack, capable of supporting the enclosure based on the data shown in Table 4.
Table 4. Physical characteristics
Enclosure Height Width Depth Maximum weight
Drive ready (without drive modules) Fully configured (with drive modules)
2145-12F 87 mm (3.46 in.) 483 mm (19.0 in.) 556 mm (21.9 in.) 16.4 kg (36.2 lb) 26.7 kg (58.9 lb)
2145-24F 87 mm (3.46 in.) 483 mm (19.0 in.) 556 mm (21.9 in.) 16.7 kg (36.8 lb) 25.0 kg (55.1 lb)

2145-92F





,

2147-92F








 222.2 mm (8.75 in.) 483 mm (19.0 in.) 968 mm (38.1 in.) 67 kg (147.7 lb) 135 kg (297 lb)
Attention: To avoid potential equipment damage during transport and subsequent loss of data, see Procedure: Transporting a 5U 92-drive expansion enclosure. The procedure describes what to do for the following situations.
  • When you are powering off a 92F, 92G, or an A9F 5U expansion enclosure because you intend to transport it to another location
  • When you intend to move a rack that contains a 92F, 92G, or an A9F 5U expansion enclosure
The procedure describes how to remove each drive from the 5U enclosure and transport the enclosure. Removing the drives prevents damage to the drives and makes the lighter enclosure easier to move.
Warning: Some racks will not provide sufficient space to close the rear door. 2145-92F , and 2147-92F model enclosures need 968 mm from the rack front post to the back of the cable management arm (CMA). In addition, allow 905 mm from the front post to the back of the enclosure. To allow space for the power cables, provide 60 to 70 mm from the back of the enclosure.
Figure 1 shows the rack space requirements for the 92F models.
Figure 1. Rack space requirements for the 92F models
Rack space requirements for the 92F models

Additional space requirements

Ensure that these additional space requirements, as shown in Table 5, are available around the enclosures.
Table 5. Clearances
Location Additional space requirements Reason
Left and right sides
50 mm (2 in.)
 Cooling air flow
Back
Minimum: 100 mm (4 in.)
This is not needed for 92F models.		 Cable exit

Supported drives for SAS expansion enclosures

Table 6 provides drive specifications for SAS expansion enclosures.
Table 6. Drive specifications
Model and type 3.5-inch drives 2.5-inch drives
2145-12F 3.5” 7.2 K RPM 12 Gbps SAS nearline HDD 4 TB, 6 TB, 8 TB -
2145-24F -
  • 2.5” Flash Drive 200 GB, 400 GB, 800 GB, 1.6 TB
  • 2.5” 15 K RPM HDD 300 GB, 600 GB
  • 2.5” 10K RPM HDD 600 GB, 900 GB, 1.2 TB, 1.8 TB, 2.4 TB
  • 2.5” 7.2 K RPM HDD 2 TB

2145-92F





,

2147-92F
  • 3.5” 7.2 K RPM 12 Gbps SAS nearline HDD 6 TB, 8 TB, 10 TB
  • 3.5” 10K RPM HDD 1.2 TB, 1.8 TB
  • 3.5” 15 K RPM HDD 600 GB
  • 2.5” Flash Drive 1.6 TB, 1.92 TB, 3.2 TB, 3.84 TB, 7.68 TB, 15.36 TB

Acoustical specifications for SAS expansion enclosures

The following table provides the acoustical specifications for the 2U SAS expansion enclosures.

Table 7. Acoustical specifications for 2U SAS expansion enclosures
Model and type Acoustical output per enclosure
2145-12F Less than 7.7 B LwA -- Operating (40% Average seek rate) @ 23°C ambient
2145-24F Less than 6.3 B LwA -- Operating (40% Average seek rate) @ 23°C ambient

The noise emission level that is stated is the declared (upper limit) sound power level, in decibels, for a random sample of machines. All measurements are made in accordance with ISO 7779 and reported in conformance with ISO 9296.

Table 8 provides the acoustical specifications for the 5U SAS expansion enclosures in accordance with ISO 9296(1,2,3).
Important: Hearing conservation program (HCP) procedures are required for field service personnel servicing a 5U SAS expansion enclosure.
Table 8. Declared noise emissions for 5U SAS expansion enclosures in accordance with ISO 9296
Model and type Declared A-Weighted Sound Power Level, LWAd (B) Declared A-Weighted Sound Pressure Level, LpAm (dB)
Operating Idling Operating Idling
Fully configured expansion enclosure, MTM/Model 2145-92F , , 2147-92F 8.5 8.5 85 85
Notes:
  1. Declared level LWAd is the upper-limit A-weighted sound power level. Declared level LpAm is the mean A-weighted sound pressure level measured at the 1-meter bystander positions.
  2. All measurements are made in conformance with ISO 7779 and declared in conformance with ISO 9296.
  3. B and dB are abbreviations for bels and decibels, respectively. 1 B = 10 dB.
Important: Government regulations (such as those prescribed by OSHA or European Community Directives) may govern noise level exposure in the workplace and may apply to you and your server installation. This system is available with an optional acoustical door feature that can help reduce the noise emitted from this system. The actual sound pressure levels in your installation depend upon a variety of factors, including the number of racks in the installation; the size, materials, and configuration of the room where you designate the racks to be installed; the noise levels from other equipment; the room ambient temperature, and employees' location in relation to the equipment. Further, compliance with such government regulations also depends upon a variety of additional factors, including the duration of employees' exposure and whether employees wear hearing protection. IBM® recommends that you consult with qualified experts in this field to determine whether you are in compliance with the applicable regulations.

Shock and vibration specifications for SAS expansion enclosures

Table 9 and Table 10 provide the shock and vibration testing results for SAS expansion enclosures.
Table 9. Shock testing results
Shock categories Test level Performance
Operational 5 g 10 ms 1/2 Sine <=25 g 10 ms
Non-operational 30 g 10 ms 1/2 Sine <=75 g 11 ms
Table 10. Vibration testing results
Vibration categories Test level Performance
Operational 0.21 grms 5-500Hz Random Throughput loss <=10% FCAL <= 0.68 grms
Non-operational 1.04 grms 2-200Hz Random <=3.12 grms
Shipping 0.3 g 2-200Hz Sine <=5 g
Rotational vibration Normal operation performance measurements in enclosure with no external vibration. Throughput loss for all drives of the same type within performance profile.