3.8 KiB
3.8 KiB
Atlantis (DS1823xs+) Storage Configuration
Overview
Atlantis is a Synology DS1823xs+ NAS running DSM 7.3.2. This document details the storage configuration and performance characteristics.
Hardware
- Model: Synology DS1823xs+ (8-bay)
- CPU: AMD Ryzen V1780B (4 cores)
- RAM: 32GB ECC
- DSM Version: 7.3.2-86009
Storage Volumes
Volume 1 - Main Storage (SATA RAID6)
| Property | Value |
|---|---|
| Drives | 8x Seagate 16TB SATA |
| RAID Level | RAID 6 |
| Usable Capacity | 84 TB |
| Filesystem | Btrfs |
| Encryption | Yes (LUKS) |
| Write Speed | ~77 MB/s |
| Read Speed | ~212 MB/s |
| Mount Point | /volume1 |
| Purpose | Primary data storage, media, backups |
Volume 2 - Fast Metadata (NVMe RAID1)
| Property | Value |
|---|---|
| Drives | 2x Crucial CT1000P310SSD8 (1TB each) |
| RAID Level | RAID 1 |
| Usable Capacity | 885 GB |
| Filesystem | Btrfs |
| Write Speed | ~422 MB/s |
| Read Speed | ~435 MB/s |
| Mount Point | /volume2 |
| Purpose | Docker configs, databases, metadata |
Volume 3 - Fast Downloads (NVMe RAID1)
| Property | Value |
|---|---|
| Drives | 2x Synology SNV5420-400G (400GB each) |
| RAID Level | RAID 1 |
| Usable Capacity | 348 GB |
| Filesystem | Btrfs |
| Write Speed | ~621 MB/s |
| Read Speed | ~706 MB/s |
| Mount Point | /volume3 |
| Purpose | SABnzbd downloads, high-I/O temporary storage |
| Created | 2026-02-01 |
NVMe Drive Layout
| Device | Model | Slot | Volume |
|---|---|---|---|
| nvme0n1 | Synology SNV5420-400G | M.2 Drive 1-2 (built-in) | Volume 3 |
| nvme1n1 | Synology SNV5420-400G | M.2 Drive 1-1 (built-in) | Volume 3 |
| nvme2n1 | Crucial CT1000P310SSD8 | M.2 Drive 1 (adapter) | Volume 2 |
| nvme3n1 | Crucial CT1000P310SSD8 | M.2 Drive 2 (adapter) | Volume 2 |
Volume 3 Creation Notes
Volume 3 was created using 007revad's Synology_M2_volume script since DSM's Storage Manager doesn't allow creating M.2 storage pools when another M.2 pool already exists.
Script used:
sudo ~/syno_create_m2_volume.sh
Configuration selected:
- RAID Type: RAID 1
- Storage Pool Type: Single Volume
- Drives: nvme0n1 + nvme1n1 (Synology SNV5420)
- Filesystem: Btrfs
Important Notes:
- Since these are Synology-branded drives (SNV5420), they should survive DSM updates without needing the Synology_HDD_db script
- After DSM updates, verify the volume is still accessible. If not, re-run the M2_volume script
- The SNV5420 drives are enterprise-grade with power loss protection (PLP)
SSD Cache Limitation
Warning: The DS1823xs+ has support_ssd_cache="no" as a factory default, which prevents using M.2 drives as SSD cache. This appears to be a Synology policy decision for the xs+ line. Combined with the "M.2 storage pool disables all M.2 cache" limitation, SSD cache is not available on this system.
Performance Comparison
| Volume | Write Speed | Read Speed | Best For |
|---|---|---|---|
| Volume 1 (HDD) | 77 MB/s | 212 MB/s | Large file storage |
| Volume 2 (Crucial NVMe) | 422 MB/s | 435 MB/s | Docker configs, databases |
| Volume 3 (Synology NVMe) | 621 MB/s | 706 MB/s | Downloads, high-I/O temp |
Docker Volume Mapping Strategy
/volume1/data → Media files, final storage
/volume2/metadata/docker2 → Container configs and databases
/volume3/usenet → SABnzbd downloads (fast writes)
The arr-suite containers (Sonarr, Radarr, etc.) are configured to:
- Download to
/volume3/usenet(fast NVMe) - Process/unpack on
/volume3/usenet(fast NVMe) - Move completed media to
/volume1/data/media(large HDD storage)
Related Files
- Arr Suite Compose:
Atlantis/arr-suite/docker-compose.yml - This documentation:
docs/hardware/atlantis-storage.md