1. System architecture

The storage system consists of a hardware RAID setup managed by a Dell PERC controller. The operating system sees the RAID arrays as standard block devices.

Key components

Dell PERC hardware RAID controller

RAID1 arrays for redundancy

Linux filesystem layer (ext4)

Media storage mounted under /mnt

2. RAID configuration

Two RAID1 arrays are used:

Old array

Device: /dev/sdb

Mount point: /mnt/Media

Filesystem: ext4

Role: existing production media storage

New array

Device: /dev/sdd

Mount point: /mnt/newMedia (temporary during migration)

Filesystem: ext4

Role: replacement storage with larger disks

3. Filesystem layout

Media data is organized as:

/mnt/Media/

JellyfinMedia/

Motorvakantie 2024/

4-7/

*.mp4

A secondary disk previously held partial or separate media:

/mnt/BonusDisk/

JellyfinMedia/

Motorvakantie 2024/

4. Design principles

Hardware RAID provides redundancy at controller level

ext4 ensures stable, widely compatible filesystem behavior

Media is stored outside system partitions for isolation

Migration strategy avoids in-place RAID expansion to reduce risk

5. Data integrity strategy

rsync -aHAX --numeric-ids used for all migrations

Two-pass sync approach:

Initial copy during active system usage

Final sync after stopping write activity

Verification via:

du

rsync --dry-run

file-level checks where needed

6. Mounting strategy

UUID-based mounting preferred over device names

/etc/fstab used for persistent mounts

Temporary mount points used during migration validation