Audit

Proving a record was not touched, without trusting us

A Ledger proof verifies against a public checkpoint. Here is how to check one yourself, with no Ferrite code anywhere in the loop.

Manual · v3.4 · 2 Sep 2026

Migration

Moving 40 TB off a legacy WORM appliance in one weekend

The weekend freeze this manual depends on is no longer necessary. Since v3.4 the copy runs under live writes.

Manual · v3.0 · 12 Aug 2026

Superseded by → Moving off a WORM appliance without a freeze window

Retention

What seven years of retention actually costs to run

We modelled a 40 TB archive at three retention lengths and three retrieval profiles. The storage line is the small one.

Report · v3.2 · 11 Sep 2026

Cost

Cold storage is not cheap storage

The retrieval bill is the one nobody models. Four workloads, and four different answers to whether cold is worth it.

Report · v3.1 · 24 Aug 2026

Security

Object lock, legal hold, and the difference an auditor cares about

Two controls that look the same in a console and are not the same in a deposition.

Note · v3.3 · 5 Aug 2026