Lenovo ThinkSystem DB720S
The ThinkSystem DB720S is Lenovo's high-density 1U Gen 7 Fibre Channel SAN switch, based on OEM Brocade G720 architecture running Fabric OS 9.x. Purpose-built for flash and NVMe storage infrastructures, it delivers up to 56 ports of 64 Gb/s line-rate performance with latency under 460 nanoseconds. It features integrated hardware-based NVMe and SCSI telemetry with autonomous SAN management tools to prevent traffic congestion. Used hardware buyers should confirm the installed port license count (base configurations start at 24 ports) and ensure both hot-swap power supplies and fan assemblies share matching airflow directions.
Also written as: ThinkSystem DB720S, DB720S SAN Switch, Brocade G720 OEM, DB720S 64Gb FC Switch
Specifications
| Brand | Lenovo |
|---|---|
| Family | ThinkSystem DB |
| Form factor | 1U rack |
| Released | Mar 2021 |
| Ports | 56x 64Gb/s SFP+ Fibre Channel ports (expandable from 24 to 56 ports in 8-port PoD increments) |
| Switching capacity | 3.584 Tbps aggregate full duplex throughput |
| Power supply | Dual redundant hot-swap AC power supplies (port-side exhaust or port-side intake) |
Generations
- Previous generation: Lenovo ThinkSystem DB620S
Reference prices (last 12 months, updated 2026-10-27)
New: USD 14,200 (1 sighting, Oct 2026)
All sightings
| Seller | Condition | Price | Note | Seen |
|---|---|---|---|---|
| cdw.com | new | USD 14,200 | Complete 56-port active bundle including 56x 64Gb SW optics and enterprise software | 2026-10-27 |
Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.
Works together
How the Lenovo ThinkSystem DB720S connects to servers, storage and the network: 1 way, with the parts and products on each path.
Fibre Channel SAN
Match the speed: 16Gb and 32Gb FC HBAs, switches and array ports work together, and each generation also runs one or two speeds below its own (a 32Gb port runs at 16Gb and 8Gb).
Servers
Lenovo ThinkSystem SR645 V3 1U rack
Lenovo ThinkSystem SR665 V3 2U rack
Lenovo ThinkSystem SR630 V3 1U rack
Lenovo ThinkSystem SR650 V3 2U rack
Lenovo ThinkServer SR660 V2 2U rack
Lenovo ThinkSystem SE450 2U rack
Adapters for the server
4XC7A77485 ThinkSystem Emulex LPe36002 64Gb 2-Port PCIe Fibre Channel Adapter
01CV750 ThinkSystem QLogic QLE2690 PCIe 16Gb 1-Port SFP+ Fibre Channel Adapter
01CV760 ThinkSystem QLogic QLE2692 PCIe 16Gb 2-Port SFP+ Fibre Channel Adapter
01CV830 ThinkSystem Emulex LPe32000-M2-L PCIe 32Gb 1-Port SFP+ Fibre Channel Adapter
Storage
Lenovo ThinkSystem DM7100H 4U rack
Lenovo ThinkSystem DE6400H 2U rack
Lenovo ThinkSystem DE6600H 2U rack
Lenovo ThinkSystem DG5000 2U rack
Lenovo ThinkSystem DE4200H 2U rack
Lenovo ThinkSystem DM3200F 2U rack
Optics
4M27A09984 Lenovo ThinkSystem 32Gb FC SFP+ Optical Transceiver
57-1000262-01 Brocade 16Gb Shortwave SFP+ Optical Transceiver
57-1000333-01 Brocade 32Gb Longwave 10km SFP28 Optical Transceiver
Plan and size it
- Draw this setup in the topology planner mrplanb.com
- Add up rack power and space rack-density.com
- Virtualization storage Ledger: scored storage platforms mrplanb.com
- SAN transport and NVMe over FC for backup mrplanb.com
- Lenovo ServerProven (Lenovo compatibility) lenovo.com
Check compatibility with Lenovo
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Lenovo has tested with the Lenovo ThinkSystem DB720S.
- Compatibility Lenovo interoperability page for the Lenovo ThinkSystem DB720S
- Compatibility Lenovo ServerProven (options and OS compatibility)
- Specifications Lenovo Press product guides
- Support Lenovo Data Center Support
Equivalent models from other brands
Buying a used DB720S: what to check
Check active port count via Fabric OS CLI 'license --show'. Confirm that both power supply modules and fan assemblies have identical airflow part numbers and test serial management access.
FAQ
Can the DB720S connect to older 16Gb and 32Gb Fibre Channel fabrics?
Yes, DB720S 64Gb SFP+ ports auto-negotiate with 16Gb and 32Gb optics and storage ports, ensuring backwards compatibility.
What port licensing options are available on the DB720S?
Base models start at 24 active ports and scale up to 56 ports via four 8-port Ports on Demand (PoD) license upgrades.
Buying or selling DB720S?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Lenovo ThinkSystem DB720S 64Gb FC SAN Switch Product Guide, checked 2026-10-27