Dell Unity XT 680F
The Dell Unity XT 680F is a high-performance all-flash enterprise storage array built to handle intensive database clustering, private cloud virtualization, and large-scale SAP workloads. Driven by dual active-active Storage Processors with 384GB of memory, the 680F supports up to 1000 all-flash SAS solid-state drives, providing up to 8.0PB raw and over 24PB effective capacity with inline deduplication and compression. Its active-active controller architecture ensures consistent throughput during node maintenance. Pre-owned buyers should verify that all installed SSDs have certified Dell EMC firmware and check battery backup units.
Also written as: Unity XT 680F, Dell EMC Unity XT 680F, Unity 680F All-Flash
Specifications
| Brand | Dell |
|---|---|
| Family | Unity XT |
| Form factor | 2U rack |
| Released | May 2019 |
| Cpu platform | Dual active-active storage processors (SPs), Intel Xeon Skylake 12-core (1.9 GHz) per SP |
| Memory max (GB) | 384 |
| Drive bays | Up to 25x 2.5-inch SAS SSDs in base DPE; expands up to 1000 all-flash SSDs across DAEs |
| Raw capacity | Up to 8.0 PB raw capacity (up to 24 PB effective with 3:1 data reduction) |
| Network onboard | 4-port 10GbE / 1GbE; 2x I/O module slots per SP supporting 16Gb/32Gb FC or 25GbE optical |
| Power supply | Dual redundant hot-plug 1800W Platinum power supplies |
Generations
- Previous generation: Dell Unity 550F
- Next generation: Dell PowerStore 3000T
Works together
How the Dell Unity XT 680F connects to servers, storage and the network: 3 ways, 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
Dell PowerEdge R650 1U rack
Dell PowerEdge R750 2U rack
Dell PowerEdge R640 1U rack
Dell PowerEdge R740 2U rack
Dell PowerEdge R660 1U rack
Dell PowerEdge R760 2U rack
Adapters for the server
540-BBUU Dell Emulex LPe31002 Dual Port 16Gb Fibre Channel Host Bus Adapter
540-BBUV Dell QLogic 2692 Dual Port 16Gb Fibre Channel Host Bus Adapter
540-BCMT Dell QLogic 2772 Dual Port 32Gb Fibre Channel PCIe Adapter
540-BCMU Dell Emulex LPe35002 Dual Port 32Gb Fibre Channel PCIe Adapter
Switches
Dell Connectrix DS-6610B 1U rack
Dell Connectrix DS-6620B 1U rack
Dell Connectrix MDS-9148T 1U rack
Dell Connectrix DS-7720B 1U rack
Optics
iSCSI and NVMe/TCP over Ethernet
Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.
Servers
- Dell PowerEdge R650 1U rack
- Dell PowerEdge R750 2U rack
- Dell PowerEdge R640 1U rack
- Dell PowerEdge R740 2U rack
- Dell PowerEdge R660 1U rack
- Dell PowerEdge R760 2U rack
Adapters for the server
540-BBGO Dell Broadcom 57416 Dual Port 10GBASE-T RJ45 PCIe Adapter
540-BBGY Dell Broadcom 57414 Dual Port 10/25GbE SFP28 PCIe Low Profile Network Adapter
540-BBHB Dell Broadcom 57414 Dual Port 10/25GbE SFP28 OCP 3.0 Mezzanine Network Adapter
540-BBRL Dell Intel X710 Quad Port 10GbE SFP+ Full-Height PCIe Adapter
Switches
Dell PowerSwitch S5248F-ON 1U rack
Dell PowerSwitch S4148F-ON 1U rack
Dell PowerSwitch S5212F-ON 1U rack
Dell PowerSwitch S5224F-ON 1U rack
Optics
407-BBOU Dell 10GbE SFP+ SR Optical Transceiver (850nm, 300m MMF)
407-BCBF Dell 25GbE SFP28 SR Optical Transceiver (850nm, 100m MMF)
SFP-10G-SR-AR Arista 10GBASE-SR SFP+ Optical Transceiver
File storage (NFS and SMB)
Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.
Servers
- Dell PowerEdge R650 1U rack
- Dell PowerEdge R750 2U rack
- Dell PowerEdge R640 1U rack
- Dell PowerEdge R740 2U rack
- Dell PowerEdge R660 1U rack
- Dell PowerEdge R760 2U rack
Adapters for the server
- 540-BBGO Dell Broadcom 57416 Dual Port 10GBASE-T RJ45 PCIe Adapter
- 540-BBGY Dell Broadcom 57414 Dual Port 10/25GbE SFP28 PCIe Low Profile Network Adapter
- 540-BBHB Dell Broadcom 57414 Dual Port 10/25GbE SFP28 OCP 3.0 Mezzanine Network Adapter
- 540-BBRL Dell Intel X710 Quad Port 10GbE SFP+ Full-Height PCIe Adapter
Switches
- Dell PowerSwitch S5248F-ON 1U rack
- Dell PowerSwitch S4148F-ON 1U rack
- Dell PowerSwitch S5212F-ON 1U rack
- Dell PowerSwitch S5224F-ON 1U rack
Optics
- 407-BBOU Dell 10GbE SFP+ SR Optical Transceiver (850nm, 300m MMF)
- 407-BCBF Dell 25GbE SFP28 SR Optical Transceiver (850nm, 100m MMF)
- SFP-10G-SR-AR Arista 10GBASE-SR SFP+ 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
- Dell E-Lab Navigator (Dell interoperability) dell.com
Check compatibility with Dell
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Dell has tested with the Dell Unity XT 680F.
- Compatibility Dell E-Lab Navigator (storage and SAN interoperability) (free vendor sign-in)
- Support Dell Support: drivers, manuals and service tag lookup
Equivalent models from other brands
- Pure Storage Storage Flasharray X50
- NetApp Aff A400
Buying a used 680F: what to check
Verify authentic Dell Unity firmware on all SSDs, test both controller battery backup packs, confirm 32Gb FC or 25GbE optics, and verify Unity OE all-flash licenses.
FAQ
What is the effective capacity of the Unity XT 680F?
Up to 24 PB effective capacity using inline deduplication and compression across 1000 all-flash SSDs.
Does the 680F support synchronous replication?
Yes, it supports zero-RPO synchronous replication for mission-critical block and file volumes.
Buying or selling 680F?
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
- Dell Unity XT 680F Spec Sheet, checked 2026-10-27