Dedicated storage, RAID & drive health
Understand controller and filesystem layers, verify drive identity and diagnose redundancy or endurance issues before physical changes.
How should I choose between RAID 0, 1, 5, 6 and 10?
Compare dedicated-server RAID levels for capacity, write workload and fault tolerance, while recognising that RAID does not replace recoverable copies.
Read the answer Dedicated storage, RAID & drive healthHow do I distinguish hardware RAID, an HBA and Linux software RAID?
Identify dedicated-server storage controllers and Linux RAID layers, and understand why changing controller mode can make existing data inaccessible.
Read the answer Dedicated storage, RAID & drive healthHow do I map a Linux disk to its physical serial number and drive bay?
Map dedicated-server disks to stable identifiers and physical bays before drive replacement, avoiding reliance on changeable Linux device names.
Read the answer Dedicated storage, RAID & drive healthHow do I read SATA or SAS drive health without starting a disruptive test?
Read dedicated-server SATA and SAS SMART health information, interpret vendor-specific counters, and avoid treating a passing summary as a guarantee.
Read the answer Dedicated storage, RAID & drive healthHow do I inspect NVMe health, temperature and wear on a dedicated server?
Read NVMe controller and namespace inventory, inspect SMART health counters, and distinguish endurance estimates from filesystem free space.
Read the answer Dedicated storage, RAID & drive healthHow do I inspect a degraded Linux RAID array without changing it?
Read Linux RAID member and degradation state, preserve evidence, and avoid force assembly or drive removal based on an incomplete diagnosis.
Read the answer Dedicated storage, RAID & drive healthWhy is a dedicated server slower during RAID recovery or rebuild?
Understand RAID rebuild workload, measure application and storage impact, and avoid changing recovery speed without considering redundancy risk.
Read the answer Dedicated storage, RAID & drive healthHow do I assess SSD endurance and write load on a dedicated server?
Track SSD wear and workload writes with vendor-defined health metrics, avoiding confusion between endurance estimates, bytes written and free space.
Read the answer Dedicated storage, RAID & drive healthWhy do raw drive capacity, RAID capacity and filesystem free space differ?
Distinguish dedicated-server disk, RAID, volume and filesystem capacity, including ZFS pools and datasets, before planning storage expansion.
Read the answer Dedicated storage, RAID & drive healthWhat must be verified before replacing a drive in a dedicated server?
Prepare a dedicated-server drive replacement with verified serial and bay identity, redundancy state, compatible replacement hardware and recovery access.
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