# Multiple Physical Disks

> The requirement that data span several physical disks so redundancy can survive a single-disk loss.

Record: `lexicon:multiple-physical-disks`
Kind: constraint
Layer: [Correctness Core](https://banes-lab.com/records/layer/correctness-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-multiple-physical-disks

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Disk-Failure Survival](https://banes-lab.com/records/lexicon/disk-failure-survival.md) and before [Parity-Based Recovery](https://banes-lab.com/records/lexicon/parity-based-recovery.md).

## Category

- [Self-Healing / Recovery / Deployment Safety](https://banes-lab.com/records/lexicon-category/self-healing-recovery-deployment-safety.md)

## Required by

- [RAID Redundancy](https://banes-lab.com/records/architecture/raid-redundancy.md)

## Linked from

- [Self-Healing / Recovery / Deployment Safety](https://banes-lab.com/ontology/principles/architecture-category-self-healing-recovery-deployment-safety.md)