The following information is a summary of the features and specifications of the server. Depending on the model, some features might not be available, or some specifications might not apply.
Table 1. Specifications.
Specification
Description
Dimension
4U server
Height: 443.5 mm (17.46 inches)
Width: 176 mm (6.93 inches)
Depth: 578 mm (22.76 inches)
Weight (depending on the configuration)
Maximum without package:
2.5-inch disk drive configuration: 21.26 kg (46.87 lb)
3.5-inch disk drive configuration: 23.56 kg (51.94 lb)
Minimum with package:
2.5-inch disk drive configuration: 17.24 kg (38.01 lb)
3.5-inch disk drive configuration: 19.32 kg (42.59 lb)
Processor
This server supports one of the following Intel® processors:
Slots: four DIMM slots (two channels, two DIMMs per channel)
DIMM types:
DDR4-2666
8 GB Single-rank, 16 GB dual-rank, or 32 GB dual-rank
ECC-UDIMM
Note
Before installing 32 GB DIMMs, make sure your system has an Intel® Xeon® E processor family installed with UEFI firmware updated to UEFI ISE114H-2.00 or later.
Drive bays (varies by model)
Drive bays and drives supported by your server vary by model.
HDD storage drive bays:
Up to four 3.5-inch simple-swap disk drives
On board SATA ports
Up to eight 3.5-inch simple-swap disk drives
On board SATA ports*
Up to four 3.5-inch hot-swap disk drives
On board SATA ports
RAID adapter
Up to eight 3.5-inch hot-swap disk drives
On board SATA ports*
RAID adapter
Up to eight 2.5-inch hot-swap disk drives
On board SATA ports*
RAID adapter
Up to sixteen 2.5-inch hot-swap disk drives
RAID adapter
Up to hybrid four 3.5-inch and eight 2.5-inch hot-swap disk drives
RAID adapter
* When M.2 or optical drive(s) are present , the on-board SATA disk drive support is limited to six HDD.
When all eight storage drives have been installed, and the system has been set to software RAID mode in the UEFI settings, regardless if the disks are configured as an array or as separate disks, drives 6 and 7 cannot be used to install the Windows operating system.
If the M.2 drive has been installed, and the system has been set to software RAID mode in the UEFI settings, regardless if the disks are configured as an array or as separate disks, the M.2 drive cannot be used to install the Windows operating system.
Optical drive bays
Two optical drive bays
Supports up to two optical drives
When the M.2 drive is present, the optical drive support is limited to one drive.
Supports up to one tape drive (RDX or LTO)
Can only be installed in lower optical drive bay
Maximum support number of optical drive plus tape drive is two pieces.
Note
Follow these steps to install the optical drive and tape drive when the M.2 drive is present.
When the M.2 drive is installed, ensure that SATA port 7 remains unconnected.
Install the optical drive into the upper media bay, Bay 1.
Install the backup drive (RDX or LTO tape) into the lower media bay, Bay 0.
Connect the optical drive to SATA port 6.
If an RDX drive is installed, connect the drive to the internal USB port adjacent to the M.2 drive using the cable that shipped with the RDX drive (see USB tape drive cable routing).
If an LTO tape drive is installed, install a SAS HBA into an available PCIe slot, and connect the drive to the adapter with the cable that is shipped with the LTO tape drive (see SAS tape drive cable routing).
If your server is installed with a Windows Server operating system, you can use the Windows Backup program to back up the data stored on tape drive media. For detailed information, refer to the user guide of the tape drive. The user guide is available for download at:http://www.lenovo.com/UserManuals
M.2 drive
Supports 2 different physical sizes of M.2 drives:
PCIe slot 1 and slot 2 do not support ARI and SR-IOV
PCIe slot 3 supports ARI and SR-IOV
ThinkSystem Broadcom NX-E PCIe 10Gb 2-Port Base-T Ethernet Adapter can only be installed in the slot 2
Input/Output (I/O) features
Front panel
One XClarity Controller USB 2.0 connector
One USB 3.1 Gen 1 connector
Rear panel
Video Graphics Array (VGA) DB-15 connector
Serial connector
One USB 3.1 Gen 1 connector
One USB 3.1 Gen 2 connector
Two RJ-45 Ethernet connectors
One RJ-45 Ethernet connector for BMC management
Network
Two 1Gbps RJ45 with BCM5720
One 1Gbps Management RJ45
RAID(depending on model)
The following options with RAID levels 0, 1, and 5 are available for this server. In addition, RAID level 10 is available when four hard-disk/solid-state drives are installed in the server.
Your server comes with the following fans to provide proper system cooling and airflow:
One heat sink and fan assembly
Two front system fans
One rear system fan
Electrical input
Universal input:
Low range: 100 to 127 V ac
High range: 200 to 240 V ac
Input frequency range: 50 to 60 Hz
Note
The ThinkSystem ST250 only supports AC input power. Do not use 240VDC input.
Power supply
The server might come with one of the following power supply configurations:
One 250W fixed power supply
One or two 550W redundant power supply
Note
If you are using uninterruptible power supplies (UPS), ensure that you use only pure-sine UPS with your ThinkServer server.
Acoustical noise emissions
Sound power, idling
3.7 bels, minimum
3.8 bels, typical
4.3 bels, maximum
Sound power, operating
3.7 bels, minimum
4.0 bels, typical
4.4 bels, maximum
Sound pressure level, idling (tabletop)
26.8 dBA, minimum
26.5 dBA, typical
39.4 dBA, maximum
Sound pressure level, operating (tabletop)
27.0 dBA, minimum
26.7 dBA, typical
40.1 dBA, maximum
Sound pressure level, idling (floor)
19.3 dBA, minimum
19.5 dBA, typical
29.5 dBA, maximum
Sound pressure level, operating (floor)
19.4 dBA, minimum
21.0 dBA, typical
32.3 dBA, maximum
Note
The sound levels were measured in controlled acoustical environments according to procedures specified by ISO 7779 and are reported in accordance with ISO 9296. The declared acoustic noise levels are based on specified configurations, which may change slightly depending on configuration/conditions.
Approximate heat output
Minimum configuration: 221 BTU , 65 W (in BTU per hour and watts)
Maximum configuration: 699 BTU, 205 W (in BTU per hour and watts)
Environment
The ThinkSystem ST250 server complies with ASHRAE Class A2 specifications. Depending on the hardware configuration, some models comply with ASHRAE Class A3 specifications. System performance may be impacted when operating temperature is outside ASHRAE A2 specification.
Air temperature:
Operating
ASHRAE Class A2: 10°C to 35°C (50°F to 95°F); the maximum ambient temperature decreases by 1°C for every 300 m (984 ft) increase in altitude above 900 m (2,953 ft).
ASHRAE Class A3: 5°C to 40°C (41°F to 104°F); the maximum ambient temperature decreases by 1°C for every 175 m (574 ft) increase in altitude above 900 m (2,953 ft). Limited configuration as 80W processor plus eight 2.5-inch disk drives.
Server off: -10°C to 60°C (14°F to 140°F)
Shipment/storage: -40°C to 60°C (-40°F to 140°F)
Maximum altitude: 3,050 m (10,000 ft)
Relative Humidity (non-condensing):
Operating
ASHRAE Class A2: 8% to 80%; maximum dew point: 21°C (70°F)
ASHRAE Class A3: 8% to 85%; maximum dew point: 24°C (75°F)
Shipment/storage: 8% to 90%
Particulate contamination
Attention
Airborne particulates and reactive gases acting alone or in combination with other environmental factors such as humidity or temperature might pose a risk to the server. For information about the limits for particulates and gases, see Particulate contamination.
Particulate contamination Attention: Airborne particulates (including metal flakes or particles) and reactive gases acting alone or in combination with other environmental factors such as humidity or temperature might pose a risk to the device that is described in this document.