mdadm

Identity

• Kernel modules: md_mod, raid0, raid1, raid456, raid10 (auto-loaded on array use)
• CLI tool: mdadm
• Config: /etc/mdadm/mdadm.conf (Debian/Ubuntu), /etc/mdadm.conf (RHEL/Fedora)
• Status file: /proc/mdstat — live array state, rebuild progress, sync speed
• Logs: journalctl -k | grep -i md, /var/log/syslog or /var/log/messages
• Distro install: apt install mdadm / dnf install mdadm

Key Operations