> ## Documentation Index
> Fetch the complete documentation index at: https://dpos.xdr.ooo/llms.txt
> Use this file to discover all available pages before exploring further.

# Storage & Filesystem

> Current validated disk baseline, artifact sizes, and filesystem constraints.

# Storage & Filesystem

## Current baseline

The current validated deployment uses one **100 GB disk including Ubuntu OS and mirror data**.

Approximate current data sizes:

| Data                              | Approximate size |
| --------------------------------- | ---------------: |
| Ubuntu OS Core / selective mirror |          3.4 GiB |
| DP 6.6.0 Phase 2 bundle           |         28.2 GiB |
| Fresh Download and Prepare peak   |         \~70 GiB |

The application performs a conservative free-space preflight and keeps a safety reserve. Future artifact sets can grow, so 100 GB is a current baseline rather than a permanent sizing guarantee.

## Optional separate data disk

A separate data disk is optional. If used, keep these paths on the **same filesystem** because preparation uses hard links and atomic renames:

```text theme={null}
/var/spool/apt-mirror
/var/spool/apt-mirror/.install-cache
/var/spool/apt-mirror/selective
/var/spool/apt-mirror/dp-phase2
```

The path name `/var/spool/apt-mirror` is retained for compatibility; the active workflow does not mean that the product builds a traditional full `apt-mirror` archive.

## Resume-aware disk accounting

Interrupted ACPS downloads can retain `.part` files. The preflight accounts for reusable completed and partial data rather than counting the entire download twice.

Do not delete `.part` files merely to retry an interrupted download.