RAID and storage
RAID software or hardware, NVMe/SSD drives and good redundancy practices.
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View offers and orderRAID hardware vs software
- RAID hardware (PERC controller, HP Smart Array), managed by the RAID card, transparent for OS. Recommended for production.
- RAID software (mdadm, ZFS), managed by OS, more flexible but consumes CPU resources.
Current levels
- RAID 1, Mirror 2 discs, good redundancy
- RAID 5/6, Parity, capacity + tolerance failure
- RAID 10, Performance and redundancy (4 min.)
Monitoring
Check the status of the discs via the manufacturer's tool (iDRAC, iLO) or mdadm --detail /dev/md0 in RAID software. Replace a failed disk quickly to avoid volume loss.
Sauvages RAID is not a backup. Plan external backups or on a second server.