Features and specifications

This topic provides a summary of the specifications of the chassis.

The features and specifications table is a two-column table where each column lists the features and specifications of the Lenovo Flex System Enterprise Chassis Types 7893, 8721, and 8724.

Size (10U)

  • Height: 440 mm (17.32 in.)
  • Depth: 830 mm (32.68 in.)
  • Width: 447 mm (17.6 in.)
  • Weight:
    • Fully configured (stand-alone): approximately 220.4 kg (486.1 lb)
    • Fully configured (in the rack): approximately 225.6 kg (497.4 lb)
    • Empty chassis with shelves: approximately 65.7 kg (145 lb)
    • Empty chassis without shelves: approximately 44.4 kg (98 lb)

Node bays (front)

The chassis comes with fourteen node bays on the front that can physically contain the following:
  • Up to fourteen 1-bay compute nodes.
    Note:

    The exact maximal number of supported 1-bay nodes is determined by input voltage and power redundancy policy. See the following table for detailed combinations, or alternatively, refer to Lenovo Capacity Planner for more details.

    See the following tables for limited maximal number of different nodes that are supported in the same chassis.

    Table 1. Limited maximal number of SN550 in the same chassis
    2500 W power output (200-208 V ac) 2745 W power output (200 or higher V ac)
    Processor TDP
    • N+1
    • N=3
    • 4 PSUs
    • with throttling
    • N+N
    • N=3
    • 6 PSUs
    • with throttling
    • N+N
    • N=3
    • 6 PSUs
    • without throttling
    • N+N
    • N=3
    • 6 PSUs
    • without throttling
    85 W 14 14 12 13
    105 W 14 14 11 12
    125 W 14 14 10 11
    130 W 14 14 10 11
    140 W 13 14 9 10
    150 W 13 14 9 10
    165 W 12 13 8 9
    Table 2. Limited maximal number of SN550 V2 in the same chassis
    2500 W power output (200-208 V ac)
    Processor TDP
    • N+1
    • N=4
    • 5 PSUs
    • With throttle
    • N+1
    • N=3
    • 4 PSUs
    • With throttle
    • N+N
    • N=3
    • 6 PSUs
    • With throttle
    • N+1
    • N=5
    • 6 PSUs
    • No throttle
    • N+N
    • N=3
    • 6 PSUs
    • No throttle
    105 W 14 14 14 14 9
    120 W 14 13 14 14 8
    135 W 14 12 13 13 8
    140 W 14 12 13 13 8
    150 W 14 12 12 12 7
    165 W 14 11 11 12 7
    185 W 13 10 10 11 6
    195 W 13 9 9 10 6
    205 W 13 9 9 10 6
    230W 12 9 9 9 5
    2745 W power output (220-240 V ac)
    Processor TDP
    • N+1
    • N=4
    • 5 PSUs
    • With throttle
    • N+1
    • N=3
    • 4 PSUs
    • With throttle
    • N+N
    • N=3
    • 6 PSUs
    • With throttle
    • N+1
    • N=5
    • 6 PSUs
    • No throttle
    • N+N
    • N=3
    • 6 PSUs
    • No throttle
    105 W 14 14 14 14 10
    120 W 14 13 14 14 9
    135 W 14 12 13 14 9
    140 W 14 12 13 14 9
    150 W 14 12 12 13 8
    165 W 14 11 11 13 8
    185 W 14 11 11 12 7
    195 W 14 10 10 11 6
    205 W 14 10 10 11 6
    230W 13 9 9 10 6
  • Up to seven 2-bay compute nodes (with the shelves removed from the chassis)
  • Up to three 4-bay storage nodes or enclosures (with the shelves removed from the chassis)
  • Mixing of 1-bay, 2-bay and 4-bay nodes (with the shelves removed from the chassis)

Device capacity (rear)

The chassis comes with the following bays on the rear:
  • Two hot-swap Chassis Management Module bays
  • Six hot-swap power-supply bays
  • Ten hot-swap fan bays
  • Four hot-swap I/O bays
  • Two hot-swap fan logic bays

Upgradeable microcode

Microcode is upgradeable when fixes or features are added.
  • Flex System Manager management node firmware
  • Chassis Management Module firmware
  • I/O module firmware
  • Compute node firmware

Security features

  • Login password for remote connection
  • Secure Sockets Layer (SSL) security for remote management access
  • Lightweight Directory Access Protocol (LDAP)
  • Trusted and signed firmware

Predictive Failure Analysis (PFA) alerts

Electrical input

Power supplies

Fan

Up to 10 variable-speed, hot-swap fan modules are supported, including the following:
  • Two 40 mm fan modules
  • Up to eight 80 mm fan modules

Management modules

Two hot-swap Chassis Management Modules

I/O modules

Supports up to four scalable switch modules with each providing a 4-lane physical interconnect.

Heat output

  • Approximate heat output:
    • Minimum configuration: 1365 Btu per hour (400 watts)
    • Maximum configuration: 44,017 Btu per hour (12,900 watts)

  • Declared sound power level: 7.5 bels
  • Chassis airflow: Full chassis configuration with all nodes, I/O modules, power supplies, and fan modules installed.
    • Minimum - 270 CFM
    • Maximum - 1,020 CFM

Environment:

The Flex System Enterprise Chassis complies with ASHRAE class A3 specifications.
  • Power on 1:
    • Temperature: 5°C - 40°C (41°F - 104°F) 3
    • Humidity, non-condensing: -12°C dew point (10.4°F) and 8% - 85% relative humidity 5,6
    • Maximum dew point: 24°C (75°F)
    • Maximum altitude: 3048 m (10,000 ft)
    • Maximum rate of temperature change: 5°C/hr (41°F/hr ) 4
  • Power off 2:
    • Temperature: 5°C to 45°C (41°F - 113°F)
    • Relative humidity: 8% - 85%
    • Maximum dew point: 27°C (80.6°F)
  • Storage (non-operating):
    • Temperature: 1°C to 60°C (33.8°F - 140°F)
    • Altitude: 3050 m (10,006 ft)
    • Relative humidity: 5% - 80%
    • Maximum dew point: 29°C (84.2°F)
  • Shipment (non-operating) 3:
    • Temperature: -40°C to 60°C (-40°F - 140°F)
    • Altitude: 10,700 m (35,105 ft)
    • Relative humidity: 5% - 100%
    • Maximum dew point: 29°C (84.2°F) 8
Parent topic: Introduction
1 Chassis is powered on.
2 Chassis is removed from original shipping container and is installed but not in use, for example, during repair, maintenance, or upgrade.
3 The equipment acclimation period is 1 hour per 20°C of temperature change from the shipping environment to the operating environment.