Scenario: "Reykjavik": Degraded software RAID

Level: Medium

Type: Fix

Tags: disk volumes  

Access: Business

Description: Warehouse app data lives on a Linux software RAID volume mounted at /srv/reykjavik (see /srv/reykjavik/warehouse.dat). Overnight monitoring fired a disk-failure alert: a RAID member failed and redundancy for that volume is no longer OK. The systemd health gate reykjavik-raid-health.service is unhappy for the same reason.

Restore full RAID redundancy for the warehouse volume. Keep the existing warehouse.dat intact.

Root (sudo) Access: True

Test: /srv/reykjavik is mounted from a healthy RAID1 array with two working members and no failed devices, and cat /srv/reykjavik/warehouse.dat prints reykjavik-warehouse-ok.

The "Check My Solution" button runs the script /home/admin/agent/check.sh, which you can read and execute.

Time to Solve: 30 minutes.