Lenovo ThinkSystem DB620S
The ThinkSystem DB620S is Lenovo's midrange 1U Gen 6 Fibre Channel SAN switch, built on OEM Brocade G620 hardware and running Brocade Fabric OS. Delivering high-density flash connectivity, it features 48 SFP+ ports operating up to 32 Gb/s and four 128 Gb/s QSFP28 ports that can be used for ISL trunking or broken out into four 32 Gb/s links each, scaling up to 64 logical ports. It includes Fabric Vision monitoring with IO Insight to measure NVMe and SCSI storage latency. Second-hand purchasers should inspect installed Fabric OS license strings, verify whether airflow direction matches the data center layout, and test both redundant power supply units.
Also written as: ThinkSystem DB620S, DB620S SAN Switch, Brocade G620 OEM, DB620S 32Gb FC Switch
Specifications
| Brand | Lenovo |
|---|---|
| Family | ThinkSystem DB |
| Form factor | 1U rack |
| Released | May 2017 |
| Ports | 48x 32Gb/s SFP+ Fibre Channel ports + 4x 128Gb/s QSFP28 ports (expandable from 24 to 64 ports via PoD) |
| Switching capacity | 2.048 Tbps aggregate full duplex throughput |
| Power supply | Dual redundant hot-swap AC power supplies (front-to-back or back-to-front airflow) |
Generations
- Next generation: Lenovo ThinkSystem DB720S
Reference prices (last 12 months, updated 2026-10-27)
Refurbished: USD 4,850 (1 sighting, Oct 2026)
All sightings
| Seller | Condition | Price | Note | Seen |
|---|---|---|---|---|
| serversupply.com | refurbished | USD 4,850 | 48-port active configuration with dual AC power and 48x 32Gb SW optics | 2026-10-27 |
Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.
Compatible parts
Transceivers
4M27A09984 Lenovo ThinkSystem 32Gb FC SFP+ Optical Transceiver
Works together
How the Lenovo ThinkSystem DB620S 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 SR650 2U rack
Lenovo ThinkSystem SR850 2U rack
Lenovo ThinkSystem SR950 4U rack
Lenovo ThinkSystem SR630 V2 1U rack
Lenovo ThinkSystem SR650 V2 2U rack
Lenovo ThinkSystem SR630 1U rack
Adapters for the server
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
01CV840 ThinkSystem Emulex LPe32002-M2-L PCIe 32Gb 2-Port SFP+ Fibre Channel Adapter
4XC7A08221 ThinkSystem QLogic QLE2742 PCIe 32Gb 2-Port SFP+ Fibre Channel Adapter
Storage
Lenovo ThinkSystem DE4000H 2U rack
Lenovo ThinkSystem DM5000H 2U rack
Lenovo ThinkSystem DM7000H 3U rack
Lenovo ThinkSystem DS4200 2U rack
Lenovo ThinkSystem DE2000H 2U rack
Lenovo ThinkSystem DM3000H 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 DB620S.
- Compatibility Lenovo interoperability page for the Lenovo ThinkSystem DB620S
- 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 DB620S: what to check
Confirm activated port count via 'licenseshow' in FOS CLI (base models start at 24 ports, licensed up to 64 ports). Verify power supply and fan tray airflow match (port-side exhaust vs port-side intake).
FAQ
What base port count does the DB620S ship with?
The base chassis ships with 24 active 32Gb SFP+ ports and can be expanded in 12-port increments using Ports on Demand (PoD) licenses up to 64 ports total.
Can the 128Gb QSFP28 ports be split into standard SFP28 links?
Yes, each 128Gb QSFP28 port can operate as a native high-speed ISL or break out into four 32Gb Fibre Channel connections using MPO-to-LC fanout cables.
Buying or selling DB620S?
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 DB620S 32Gb FC SAN Switch Product Guide, checked 2026-10-27