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Immutable S3 backup storage · built for Veeam · owned by Veeam since Jan 2026

Object First Ootbi immutable storage for Veeam
S3 storage that locks each backup as it is written

Ootbi is a backup storage appliance that does one job: hold Veeam backups in S3 object storage locked with Object Lock in compliance mode, on an operating system nobody has to harden themselves. It comes as a 2U rack appliance and a desktop Mini, and clusters up to four nodes.
18–432 TB[src]
PER 2U NODE
8–24 TB[src]
PER OOTBI MINI
1.7 PB[src]
LARGEST 4-NODE CLUSTER
8 GB/s[src]
TOP CLUSTER INGEST
INSTANT RECOVERY VMS, 4 × 432 TB
v12+[src]
VEEAM BACKUP & REPLICATION
Overview

What Object First Ootbi is, and what it is not

Object First Ootbi is purpose-built immutable storage for Veeam: Object First describes it as the first and only backup storage appliance built for Veeam[src], and since January 2026 Veeam owns the company[src].

Inside, a 2U Ootbi node is a server with a RAID 6 or RAID 60 disk array, an NVMe cache and a custom hardened Linux; the desktop Mini uses mirrored drives[src][src]. Veeam connects to it only as an S3 client, with a service point and an access key, and SSH is switched off once setup is done[src][src]. Ootbi currently runs S3 Object Lock in compliance mode only, according to Object First's Help Center[src]: the AWS-defined mode in which no user, including the root account, can delete a locked object version or shorten its retention[src].

It is not a deduplicating appliance. It stores Veeam's backup blocks at Veeam's standard block size with Veeam encryption left on[src], and although it speaks standard S3, the configuration guides in Object First's Help Center cover Veeam products: Backup & Replication, Backup for Microsoft 365 and Kasten[src][src].

Object First Ootbi capacity, from one Mini to several clustersOne cluster is four nodes at most. Larger estates add clusters as extents of a Veeam Scale-Out Backup Repository.Usable immutable capacity, TB (log scale)5505005,000Ootbi Mini nodeDesktop tower8 – 24Ootbi Mini clusterUp to 4 Mini nodes8 – 96Ootbi 2U nodeSix capacities18 – 43218–216 TB cluster4 nodes of the smaller models18 – 864432 TB cluster4 × 432 TB nodes432 – 1,728Several clusters in SOBRObject First: beyond 7 PB7 PB and beyondOne cluster is four nodes at most. Larger estates add clusters as extents of a Veeam Scale-Out Backup Repository.
Per-node and per-cluster usable capacity across the range, on a log scale. Node and 2U cluster figures from Object First's two datasheets and the Ootbi web table; the 96 TB Mini cluster and the multi-cluster figure from Object First's product overview, which reaches the latter through a Veeam Scale-Out Backup Repository.
Architecture

Where Ootbi sits in a Veeam 3-2-1-1-0 design

Veeam's Zero Trust Data Resilience guidance separates backup software from backup storage and spreads copies across several resilience zones[src]. Ootbi is the on-site, immutable zone; it is not the only copy. Object First's own reference design adds Veeam Data Cloud Vault as the offsite copy[src].
Veeam to Ootbi to an offsite copyOotbi supports Veeam's direct-to-object mode and SOBR performance and capacity tiers.PROTECTVMs, servers, NASvSphere, Hyper-V, AHV,agentsMicrosoft 365Veeam Backup for M365BACKUP SOFTWAREVeeam Backup &Replicationv12 or v13, proxies,encryption onCOPY 1: ON SITEOotbi bucketcompliance-mode ObjectLockCOPY 2: OFF SITEVeeam Data CloudVaultor tape, or Ootbi at aDR siteThe 1 in 3-2-1-1-0 is the immutable or offline copy; the 0 is zero errors, confirmed by verifying backups.Ootbi supports Veeam's direct-to-object mode and SOBR performance and capacity tiers.
A typical design: Veeam writes the first copy direct to an Ootbi bucket over S3/HTTPS, then a backup copy job or SOBR capacity tier sends a second copy offsite. Object First pairs Ootbi with Veeam Data Cloud Vault for the offsite copy; tape or a second Ootbi at another site fill the same role.

Object First documents Ootbi as a primary Veeam repository, as the performance tier of a Scale-Out Backup Repository, or as its capacity tier behind another primary target[src]. It also supports Veeam's Smart Object Storage API, which gives Veeam real capacity reporting and lets it place backups evenly across SOBR extents[src][src]. How the Veeam integration works →

Choosing

Ootbi 2U or Ootbi Mini

The two families share the software, the security model and the Veeam integration. They differ in capacity, speed and where they live.
Ootbi MiniOotbi 2U, 18–216 TBOotbi 2U, 432 TB
Capacity per node8, 16 or 24 TB[src]18, 36, 72, 144 or 216 TB[src]432 TB[src]
Largest 4-node cluster96 TB[src]864 TB[src]1.7 PB[src]
Ingest per node~300 MB/s[src]Up to 1 GB/s[src]Up to 2 GB/s[src]
Instant Recovery VMs per nodeUp to 20[src]Up to 20[src]Up to 45[src]
Form factorDesktop tower[src]2U rackmount, 72.2 cm deep[src]2U rackmount, 87.3 cm deep[src]
Data network2 × 1 GbE or 2 × 10GBASE-T[src]2 × 10GBASE-T or 2 × 10/25 GbE SFP28[src]2 × 10/25 GbE SFP28[src]
Power500 W cabled power supply[src]2 × 1,100 W redundant, 490 W backing up[src]2 × 1,100 W redundant, 620 W backing up[src]

Two data ports are active at a time and both must be the same type on every model[src][src]. Mini clusters are built from Mini nodes; Object First publishes no mixed Mini and 2U cluster.

Hours to ingest a 100 TB first full backup on OotbiArithmetic: TB × 1,000,000 ÷ MB/s ÷ 3,600. Incrementals after the first full are a fraction of this.Hours to ingest at the rated cluster speed24-hour backup window1 × Ootbi 216 TB1 GB/s rated28 h1 × Ootbi 432 TB2 GB/s rated14 h4 × Ootbi 216 TB4 GB/s, linear scaling6.9 h4 × Ootbi 432 TB8 GB/s, the datasheet maximum3.5 hArithmetic: TB × 1,000,000 ÷ MB/s ÷ 3,600. Incrementals after the first full are a fraction of this.
Worked example, not an Object First benchmark: hours to land a 100 TB first full backup at each 2U configuration's rated maximum ingest, assuming Veeam's proxies and network can keep up. A 100 TB full is beyond any Ootbi Mini cluster (96 TB at most), so the Mini is left out. Rated figures from the appliance datasheet; four-node figures assume the linear scaling Object First describes.
Go deeper

The rest of the Object First range

2U appliance

Ootbi 18 to 432 TB

Six capacities, the disk layout behind each one, power draw and four-node clusters. Ootbi specifications →
Small sites

Ootbi Mini

8, 16, 24 TB in a desktop tower for branches and offices without a rack. Ootbi Mini →
Security

Object First’s “Absolute Immutability”

Compliance-mode Object Lock, Zero Access, third-party testing, and what an attacker can still do. How it holds up →
Operations

Fleet Manager and Honeypot

Cloud monitoring across sites and a decoy Veeam server that raises the alarm. Monitoring and detection →
Buying

CapEx or Consumption

Buy the appliance or pay per TB a month from a 10 TB commitment. How each model works →
Alternative

Or build a Hardened Repository

Veeam's own software-defined option on hardware you choose. Build or buy →
Support

What comes with every Ootbi

Object First takes the support case for the whole appliance, hardware and software, and coordinates parts and field engineers with the hardware vendor itself[src].
Included

Three years of service and support

Labour and parts for three years with each unit, with next-business-day replacement once a fault is diagnosed[src].
Response

1 hour when Ootbi is down

4 hours when it is degraded, and 4 business hours, best efforts, for general questions; Object First lists an EMEA support number in the UK[src].
Veeam

Joint cases with Veeam

Object First works cases jointly with Veeam where you hold both support contracts[src].
Updates

Vendor-supplied updates

Object First supplies firmware, OS and software updates for the whole appliance, applied from the web console or from an offline bundle, so nobody has to build or harden a Linux server[src][src].
Supply & quote

Get Object First Ootbi sized and quoted

  • We size nodes from your source data, change rate, retention and immutability period, including the 10 days Veeam adds on top.
  • We choose between one larger node and several smaller ones, against your backup window and growth.
  • We check Veeam version, network ports and rack space before you order.
  • We quote the appliances and Object First support together; ask us about Consumption if you would rather not buy outright.

Get an Ootbi quote

Tell us how much Veeam protects and how long backups must stay locked. We size the appliance or cluster and quote it.

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FAQs

Object First Ootbi: common questions

What is Object First Ootbi?

Ootbi (short for Out-of-the-Box Immutability) is an on-premises backup storage appliance built for Veeam. It runs Object First’s own hardened Linux, presents S3 object storage with Object Lock, and is added to Veeam Backup & Replication 12 or later as an S3-compatible repository. There is a 2U rack model from 18 to 432 TB a node and a desktop Ootbi Mini from 8 to 24 TB.

Did Veeam buy Object First?

Yes. Veeam’s own blog states that Veeam acquired Object First in January 2026, so Ootbi now sits in the same portfolio as Veeam’s software-defined Hardened Repository. Ootbi is still documented and supported by Object First, through its own Help Center and support line.

How large can an Ootbi cluster grow?

A cluster takes up to four nodes, and node capacities can be mixed. Four 432 TB nodes give 1.7 PB of usable immutable storage; four of the 18 to 216 TB models top out at 864 TB. Object First says capacities beyond 7 PB are reached with several clusters inside a Veeam Scale-Out Backup Repository. Ootbi Mini clusters take up to four Mini nodes, 96 TB.

Does Ootbi work with backup software other than Veeam?

Object First builds and documents Ootbi for Veeam: its Help Center has configuration guides for Veeam Backup & Replication v12 and v13, Veeam Backup for Microsoft 365 and Veeam Kasten. Ootbi speaks standard S3, and its release notes mention compatibility with tools such as the AWS CLI and rclone, but Object First publishes no guide for any other backup product. If Veeam does not write your backups, a general-purpose S3 target with Object Lock is the more natural fit.

Is the backup data on Ootbi immutable straight away?

Yes, in a bucket created with versioning enabled. Ootbi currently runs S3 Object Lock in compliance mode only, with no governance option (Object First says governance mode is planned), and Object First says objects are immutable the moment they are written. Versioning and immutability are set when a bucket is created and cannot be switched off for that bucket afterwards. Veeam then decides how long each restore point is locked: at least the immutability period you set, and up to 10 days longer because of the block generation Veeam uses on S3-compatible storage.

What support comes with an Ootbi appliance?

Object First includes three years of service and support for labour and parts with each unit, with next-business-day replacement once a fault is diagnosed. Its support page targets a 1-hour response when Ootbi is down, 4 hours when it is degraded and 4 business hours, on a best-efforts basis, for general questions, and lists an EMEA number in the UK. On a CapEx purchase, updates and support run for a fixed term, generally up to five years.

Can Servnet supply Object First Ootbi in the UK?

Yes. We can supply and quote Ootbi 2U appliances, Ootbi Mini and multi-node clusters, sized from your source data, change rate, retention and immutability period. If you want the pay-per-use Consumption model, tell us on the form and we will confirm how it can be provided for you; Object First places those agreements through its partners.

The Object First range

More Object First pages

Keep exploring

Related Servnet guides, tools and hardware

Sources

Every specification on this page comes from Object First's own datasheets, product pages and Help Center, and every statement about how Veeam behaves comes from Veeam's own documentation, listed below with their dates. Where Object First's web copy and a datasheet differ, we use the datasheet. Figures are confirmed against the current revision when we quote.

  1. Object First Appliance datasheet (1.1_20260116) · PDF dated 13 Mar 2026
  2. Object First Ootbi Mini datasheet (1.1_20260116) · PDF dated 28 Aug 2026
  3. Object First Ootbi Appliance · web page, read 30 Oct 2026
  4. Object First product overview · web page, read 30 Oct 2026
  5. Object First Help Center 1.7: Integrating Ootbi in a backup infrastructure · Help Center v1.7, read 30 Oct 2026
  6. Object First Help Center 1.7: S3 repository for Veeam Backup for Microsoft 365 · Help Center v1.7, read 30 Oct 2026
  7. Amazon S3 User Guide: Locking objects with Object Lock · AWS documentation, read 30 Oct 2026
  8. Veeam blog: Understanding Zero Trust Data Resilience (ZTDR) · published 1 Mar 2024, updated 12 Jun 2026
  9. Object First Help Center 1.7: About Ootbi (direct-to-object, SOSAPI, ZTDR) · Help Center v1.7, read 30 Oct 2026
  10. Veeam Backup & Replication 13 User Guide: Smart Object Storage API (SOSAPI) · page updated 13 Aug 2026, build 13.1.2.57
  11. Veeam blog: Immutable Backup Solutions: Linux Hardened Repository · published 6 Apr 2023, updated 6 Aug 2026
  12. Veeam Data Cloud Vault + Ootbi = 3-2-1 backup, solution brief · PDF dated 29 Jul 2025
  13. Pre-Requisites Checklist to Achieve Box-to-Backup in 15 Minutes · PDF dated 28 Dec 2023
  14. Object First Help Center 1.7: Release notes · latest entry 1.7.99.15600, 1 Sep 2026
  15. Ootbi Step-by-Step Installation Guide and support information · web page, read 30 Oct 2026
  16. Object First Product Support: terms and severity levels · web page, read 30 Oct 2026
  17. Object First Trust Center · web page, read 30 Oct 2026

Object First, Ootbi and Simply Resilient are trademarks of Object First; Veeam is a trademark of Veeam Software, which acquired Object First in January 2026. Servnet is an independent UK IT reseller; this page is our own guide to the range.

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