---
title: "2026-09-08 HistAI Ceph prefix listing"
description: "Verified read-only AWS CLI access to the HistAI source-data prefix in the vxdata Ceph bucket."
image: "https://docs.virdx.dev/img/virdx-social-card.png"
---

> Documentation Index
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# 2026-09-08 HistAI Ceph prefix listing

## Work Done

- Used the local AWS CLI profile `ceph` to list `s3://vxdata/source-data/histai/`.
- Confirmed the command exits successfully and the prefix currently contains `Breast/`, `Prostate_2/`, and `data/`.
- No objects were created, changed, copied, or deleted.

## Lessons Learned: Pitfalls

- The general histo workstream and SOP documents were not needed for this read-only storage lookup.
- A plain `aws s3 ls` lists only the immediate children. Deeper inspection requires a child prefix or `--recursive`.

## Lessons Learned: Improvements

- A short infrastructure SOP could document the configured Ceph AWS CLI profile and standard read-only listing commands, without storing credentials.

Source: https://docs.virdx.dev/knowledge/inbox/2026-09-08-histo-histai-ceph-prefix-listing/index.mdx