What is an LTO tape library?
An LTO tape library is an automated tape storage system with multiple LTO tape drives, anything from 24 to many thousands of cartridge slots, a barcode reader and a robot that moves cartridges between slots, drives and the mail (I/O) slots. Your backup or archive software controls the library, so backups, restores and off-site rotation run without manual tape handling.
Why choose an LTO tape library?
- Ransomware protection — cartridges in slots are offline until loaded. Partitions, vaulting and export slots add further isolation.
- Lowest cost per terabyte at petabyte scale, with far lower power and cooling than equivalent disk.
- Pay-as-you-grow — capacity-on-demand licensing activates more slots as your data grows; add drives for throughput.
- Compliance — barcode tracking, encryption key management, WORM media and audit logs.
- Mixed generations — partition one library into LTO-10 and LTO-9 logical libraries.
LTO tape libraries we supply
| Class | Typical slots | Typical drives | Models |
|---|---|---|---|
| Entry / modular | 24–600 | 2–42 | Quantum Scalar i3, HPE StoreEver MSL, IBM TS4300, Spectra Stack, Qualstar Q24, Q40 & Q80 |
| Mid-range | 100–2,000 | Up to ~50 | Quantum Scalar i6, multi-module Spectra Stack |
| Enterprise | 1,000–10,000+ | Up to 100+ | Spectra T950, Quantum Scalar i6H, IBM Diamondback |
We also supply libraries from Dell Technologies, Lenovo and Fsas Technologies. Ask for the latest models and specifications.
How much can an LTO tape library store?
Capacity is simply licensed slots × native cartridge capacity:
| Slots | LTO-9 (18 TB) | LTO-10 (30 TB) | LTO-10 (40 TB) |
|---|---|---|---|
| 24 | 432 TB | 720 TB | 960 TB |
| 80 | 1.44 PB | 2.4 PB | 3.2 PB |
| 200 | 3.6 PB | 6 PB | 8 PB |
| 560 | 10.1 PB | 16.8 PB | 22.4 PB |
| 1,000 | 18 PB | 30 PB | 40 PB |
Native capacity. Compressed capacity is up to 2.5× higher depending on data type.
What we need for an LTO tape library quote
- Data volume and growth — how much you need to store now and in three to five years.
- Retention and rotation — how long you keep data and how many copies go off-site.
- Backup window — to size the number of drives (each LTO-9/LTO-10 drive writes ≈1.44 TB/hour native).
- LTO generation — LTO-10, LTO-9 or a mixed library.
- Host interface — SAS, Fibre Channel or iSCSI.
- Software — your backup or archive application.
We also offer trade-ins on older libraries, support renewals, drive and slot licences, and LTO tapes pre-labelled for your library.
LTO tape library FAQ
What is an LTO tape library?
An LTO tape library is an automated system containing multiple LTO tape drives, dozens to thousands of cartridge slots, a barcode reader and a robot that moves tapes between slots and drives under the control of your backup or archive software.
How much can a tape library store?
Multiply the licensed slots by the native capacity of your media. For example, 80 slots of LTO-10 (30 TB) provides 2.4 PB native, or 3.2 PB using 40 TB LTO-10 cartridges. Enterprise libraries scale to many petabytes.
Can I add slots and drives later?
Yes. Most modern libraries use capacity-on-demand: you buy the slots you need now and activate more with a licence key, add drives as throughput needs grow, or add expansion modules.
Can a library run LTO-9 and LTO-10 drives together?
Yes. Libraries can be partitioned into logical libraries, so you can run an LTO-10 partition for new data alongside an LTO-9 partition for restoring older LTO-8 / LTO-9 tapes.
What do you need for a tape library quote?
Number of drives, LTO generation, host interface (SAS, Fibre Channel or iSCSI), data volume and retention, and your backup or archive software. If you are unsure, call us and we will size it with you.
Get an LTO tape library quote
Our specialists will size your library, drives and media — and quote the same working day.