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ETERNUS LT250 is an open systems tape library that employs highly reliable, large-capacity LTO Ultrium tape drives. With the capability to back up data from multiple servers into a single tape library, this model achieves efficient utilization of storage assets while reducing operating costs and TCO.

ETERNUS LT250 is a tape library for the markets for products based on open system architectures. Part of the mid-range class of tape libraries, ETERNUS LT250 unit can be mounted in a 19-inch locker and house up to 18U or 91 cartridges.

A small-size, large-capacity, high-speed backup system can be configured by mounting up to six high-performance tape drives with LTO-4 and later technology. Aside from the model that is mounted in a 19-inch rack, a standalone model is available. ETERNUS LT250 main unit and all related optional products conform to the RoHS Directive.

The sale of this product was terminated in October 2014. The successor products is ETERNUS LT260.

Features and Benefits : ETERNUS LT250

  • Supports LTO-4, LTO-5 and LTO-6
  • Up to 91 tape cartridges with 227.5TB(LTO-6) storage capacity
  • Cartridge memory (LTO-CM)
  • High data throughput
  • High investment protection
  • Easy upgrade of the needed storage capacity
  • Minimizes load time
  • Fast access to and high-speed restoration from files
  • Available with industry standard interface options including Fibre Channel
  • Connects to a wide variety of UNIX and industry standard servers
  • Tape library sharing among OS - Logical Library function
  • Supports a heterogeneous environment
  • Cartridge Access Station with up to 18 tape cartridges
  • Operator friendly large LCD touch panel
  • Web based remote management
  • Simplifies media management
  • Makes operation very easy
  • Easy management from any network connected computers
  • Redundant and hot-swappable fans and power supplies
  • Auto-cleaning feature
  • Minimizes down time
  • Prevents read/write errors by keeping good condition
  • WORM technology using LTO-3 and later
  • Hardware encryption function using LTO-4 and later technology
  • Provides data security and regulatory compliance
  • Helps secure sensitive data

Technical Details : ETERNUS LT250


Number of cartridges 61 - 91
- Note When using 1 CAS port, the max number of cartridges is 91.
When using 2 CAS ports, the max number of cartridges is 82. (9 cartridges at 1 CAS port)
The max number of cartridges is 88, when the auto cleaning function is used.
Number of robots 1
Number of tape drives 2 - 6
Number of cartridges at CAS (Cartridge Access Station) 9 or 18
Interface Fibre Channel (Max. 8Gbit/s)
Drive type LTO-4 FH LTO-5 FH LTO-6 FH
Total capacity Native 72.8 TB 136.5 TB 227.5 TB
Compressed 145.6 TB
(assuming 2:1)
273.0 TB
(assuming 2:1)
568.75 TB
(assuming: 2.5:1)
Max. Data Throughput Native 240 MB/s - 720 MB/s 280 MB/s - 840 MB/s 320 MB/s - 960 MB/s
Compressed 480 MB/s - 1440 MB/s
(assuming 2:1)
560 MB/s - 1680 MB/s
(assuming 2:1)
800 MB/s - 2,400 MB/s
(assuming: 2.5:1)
Data transfer speed Native 120 MB/s 140 MB/s 160 MB/s
Compressed 240 MB/s
(assuming 2:1)
280 MB/s
(assuming 2:1)
400 MB/s
(assuming: 2.5:1)
Storage capacity per tape Native 800 GB 1.5 TB 2.5 TB
Compressed 1600 GB
(assuming 2:1)
3 TB
(assuming 2:1)
6.25 TB
(assuming: 2.5:1)
Variable speed recording 1.61m/s - 6.33m/s 1.70m/s - 5.98m/s 1.70m/s - 6.833m/s
Cartridge loading time 17 sec 12 sec 12 sec
Hardware Encryption Possible Possible Possible
- Note A backup software solution has to be ordered additionally to use the encryption feature successfully


Dimension (W x D x H) 440 x 820 x 787 mm (18U)
17.4 x 32.3 x 31.0 inches
546 x 969 x 897 mm
21.5 x 38.2 x 35.4 inches
Maximum Weight (w/o cartridges) 139 kg / 306 lbs 196 kg / 432 lbs
- Note The weight of each cartridge is approximately 250g (0.55lbs)


Power Voltage AC 100 - 240 V
Phase Single
Frequency 50/60 Hz
Maximum Power Consumption 500 W / 660 VA
Maximum Heat Generation 1800 kJ/h / 1706 BTU/h
Temperature Operating 10 - 35 °C / 50 - 95 °F
Non-operating -35 - 65 °C / -31 - 149 °F
Humidity Operating 20 - 80%RH
Non-operating 10 - 95%RH
Altitude Operating 3000 m / 10000 ft.
Non-operating 12000 m / 40000 ft.
Air quality The library should be placed in an area with minimal sources of particulate contamination. Avoid areas near frequently used doors and walkways, stacks of supplies that collect dust, printers, and smoke-filled rooms. Excessive dust and debris can damage tapes and drive.


Sound Power Level (LWAd) 70 dB
Sound Pressure Level (LpAm) 55 dB
- Notes measured with single enclosure according to ISO7779 and declared according to ISO9296


A wide range of host operating systems, servers as well as applications is supported.
For a detailed support matrix check:


Product safety UL60950-1, CSA-C22.2 No. 60950-1, EN60950-1, IEC60950-1
Electromagnetic Compatibility FCC CFR47 part 15 Class A, ICES-003 Class A, EN55022 Class A, VCCI Class A,
Electromagnetic Immunity EN 55024
Environmental compliance RoHS-compliant (Restriction of hazardous substances)
WEEE-compliant (Waste electrical and electronical equipment)
- Notes There is general compliance with the safety requirements of all European countries and North America. National approvals required in order to satisfy statutory regulations or for other reasons can be applied for on request.
Compliance link Compliance link:


For futher information, please see ETERNUS LT250 datasheet (240 KB)

Documents : ETERNUS LT250

Data Sheet

  • Data Sheet: ETERNUS LT250
  • For other ETERNSU LT series, please see Tape Systems:Data sheets

Supported Configurations

  • ETERNUS LT250: Supported Devices (support matrix)


White paper

  • White papaer for ETERNUS LT250

Support Packs Options

  • 9x5, Next Business Day, Onsite Response Time
  • 9x5, 4h Onsite Response Time
  • 24x7, 4h Onsite Response Time

Recommended Service:

24x7, Onsite Response Time: 4h.

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