SAS expansion enclosure environment requirements

Before you install a SAN Volume Controller 2145-12F, 2145-24F, 2145-92F, or 2147-92F 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.

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)	180 V to 264 V single phase AC at a frequency of 47 Hz to 63 Hz	16A Requires a C19 power socket (C19 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.
Back pressure from rack doors and other obstacles cannot exceed 5 pascals (0.5 mm Water gauge).

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)
Operating	5°C to 30°C (41°F to 86°F)	2134 - 3048 m (7001 - 10000 ft)	8% to 80% noncondensing	23°C (73°F)
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	29°C (84°F)

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
Enclosure	Height	Width	Depth	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)

Warning: 2145-92F and 2147-92F models need 968 mm from the rack front post to the back of the cable management arm (CMA). There are racks that will not provide sufficient space to close the rear door.

Figure 1 shows the rack space requirements for the 92F models.

Figure 1. 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 SAN Volume Controller SAS expansion enclosures

Table 6 provides drive specifications for SAN Volume Controller 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 SAN Volume Controller SAS expansion enclosures

The following table provides the acoustical specifications for the 2145-12F and 2145-24F SAS expansion enclosures.

Table 7. Acoustical specifications for 2145-12F and 2145-24F 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 2145-92F and 2147-92F 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 2145-92F or 2147-92F SAS expansion enclosure.

Table 8. Declared noise emissions for 2145-92F and 2147-92F SAS expansion enclosures in accordance with ISO 9296
Model and type	Declared A-Weighted Sound Power Level, L_WAd (B)		Declared A-Weighted Sound Pressure Level, L_pAm (dB)
Model and type	Operating	Idling	Operating	Idling
Fully configured expansion enclosure, MTM/Model 2145-92F, 2147-92F	8.5	8.5	85	85
Notes: Declared level L_WAd is the upper-limit A-weighted sound power level. Declared level L_pAm is the mean A-weighted sound pressure level measured at the 1-meter bystander positions. All measurements are made in conformance with ISO 7779 and declared in conformance with ISO 9296. "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 SAN Volume Controller SAS expansion enclosures

Table 9 and Table 10 provide the shock and vibration testing results for SAN Volume Controller 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.