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How long does it take to backup 10 TB over 10GbE? RAID and NVMe write speeds

2h 13m for 10 TB over 10 GbE is the ceiling a well-specced home server can hit. In the real world, disk throughput pulls most transfers below this. Plan for 3-4 hours unless everything on the data path is NVMe.

A 10 TB transfer over 10 Gigabit Ethernet works out to 2 hours 13 minutes 20 seconds at the full 10 Gbps. That's the same figure as 1 TB over Gigabit, moving 10x the data at 10x the rate, and the transfer that defines what a 10 GbE home NAS upgrade actually buys you in practice.

By TechCompare · Updated

Transfer time
2h 13m 20s
At peak link speed
File size
10 TB
10000 GB
Link speed
10 Gbps
10 Gigabit Ethernet

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Data Transfer Calculator

Estimated Transfer Time
2h 13m 20s
about 50 million pages of PDFs
This exact 10 TB copy over 10 Gigabit Ethernet, pre-loaded. Change the file size, link, or model a longer round trip.
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How this is calculated

Hitting the full 10 Gbps requires disks that can sustain ~1.2 GB/s on both ends, which is a real constraint. A single NVMe drive manages it, while a 4-drive RAID 5 of 7200 RPM disks typically maxes out around 600 MB/s sequential write, halving the effective transfer rate. Enterprise 25 GbE and 40 GbE Ethernet cut this to 53 and 33 minutes respectively, but cost an order of magnitude more and rarely make sense outside data centers.

Verdict

At the 10 Gbps line rate, 10 TB takes about 2 hours 13 minutes 20 seconds, the same time as 1 TB over Gigabit Ethernet because both the data and link rate are ten times larger. In practice, drives usually limit throughput before the network does: SATA SSDs top out around 540 MB/s, and hard drives are slower still. Plan for 3-4 hours unless the source, network, and destination can all sustain near-line-rate throughput.

More Ethernet scenarios

100 GB over USB 3.0
A 100 GB transfer over USB 3.0 works out to exactly 2 minutes 40 seconds at the interface's 5 Gbps peak rate.
View details ➜
1 TB over USB 3.0
A 1 TB transfer over USB 3.0 works out to 26 minutes 40 seconds at the interface's 5 Gbps peak data rate.
View details ➜
4 GB over USB 2.0
A 4 GB transfer over USB 2.0 works out to 1 minute 6 seconds at the interface's 480 Mbps peak rate.
View details ➜

Related guides

Cat6 vs Cat6a ethernet cable
The cable upgrade that enables 10 Gbps ethernet transfers.
View guide ➜
RAID 5 vs RAID 6 parity storage
The storage tiers that gate 10 TB transfer completion.
View guide ➜

Frequently asked questions

Do standard hard drives bottleneck a 10GbE connection?
Yes, a standard SATA hard drive writes around 150-200 MB/s, which uses less than 20% of a 10 Gbps connection's potential.
Do hard drives bottleneck a 10 GbE transfer?
Yes, for sustained 10 Gbps single-stream transfers. 10 GbE delivers 1,250 MB/s theoretical, but a single HDD tops out around 150-250 MB/s sustained. Even fast SATA SSDs max out at 550 MB/s. To saturate 10 GbE you need either a fast NVMe source or RAID 0/10 with multiple drives striping reads in parallel.
How long does a 10 TB transfer take over 10 GbE in real life?
The theoretical minimum is 2h 13m 20s at full 10 Gbps line rate. Real-world NVMe-to-NVMe transfers with a tuned SMB or NFS stack land around 2.5-3 hours. With HDDs at both ends, expect 4-6 hours because the drives can't keep up. The 10 GbE link itself is almost never the bottleneck.

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