> ## Documentation Index
> Fetch the complete documentation index at: https://docs.polystack.tech/llms.txt
> Use this file to discover all available pages before exploring further.

# Block Storage

> Persistent block storage volumes for Polystack Compute instances.

Durable, high-performance block storage volumes that attach to your Polystack Compute instances and persist independently of instance lifecycle.

<Card title="Software-Defined-Storage" icon="up-right-from-square" href="https://polystack.tech/" color="#bf9667" horizontal>
  Product details, hardware compatibility, and datasheet on polystack.tech
</Card>

***

<p style={{ fontSize: '1.25rem', fontWeight: 700, marginBottom: '0.75rem' }}>Block Storage</p>

<CardGroup cols={2}>
  <Card title="User Guide" icon="book-open" href="/services/storage/user-guide" color="#bf9667">
    Create, attach, detach, and resize volumes. Manage snapshots, backups, and volume transfers. Step-by-step workflows for both Dashboard and CLI.
  </Card>

  <Card title="Admin Guide" icon="gear" href="/services/storage/admin-guide" color="#bf9667">
    Configure storage backends, define volume types and QoS policies, manage storage tiers, set quotas, and maintain the block storage service.
  </Card>

  <Card title="CLI Reference" icon="terminal" href="/services/storage/cli-reference" color="#bf9667">
    `openstack volume` commands for creating, managing, and querying volumes and snapshots from the command line.
  </Card>

  <Card title="Software-Defined-Storage Product Page" icon="up-right-from-square" href="https://polystack.tech/" color="#bf9667">
    Distributed storage architecture, supported hardware, performance benchmarks, and licensing information.
  </Card>
</CardGroup>

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<p style={{ fontSize: '1.25rem', fontWeight: 700, marginBottom: '0.75rem' }}>Key Capabilities</p>

<CardGroup cols={2}>
  <Card title="Persistent Volumes" icon="hard-drive" href="/services/storage/create-volume" color="#bf9667">
    Volumes exist independently of instances — data survives instance deletion, restart, and migration.
  </Card>

  <Card title="Live Resize" icon="expand" href="/services/storage/extend-volume" color="#bf9667">
    Extend volume capacity online without detaching or rebooting the attached instance.
  </Card>

  <Card title="Snapshots & Backups" icon="copy" href="/services/storage/snapshots" color="#bf9667">
    Point-in-time crash-consistent snapshots and incremental backups to protect critical data.
  </Card>

  <Card title="Storage Tiers" icon="layer-group" href="/services/storage/storage-tiers" color="#bf9667">
    NVMe, SSD, and HDD-backed volume types with defined IOPS and throughput guarantees for every workload class.
  </Card>

  <Card title="Volume Encryption" icon="lock" href="/services/storage/encryption" color="#bf9667">
    Transparent at-rest encryption backed by the Polystack Key Management service — no application changes required.
  </Card>

  <Card title="Cross-Project Transfers" icon="arrow-right-arrow-left" href="/services/storage/volume-transfers" color="#bf9667">
    Transfer volume ownership between projects with a secure token-based handoff workflow.
  </Card>
</CardGroup>

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<p style={{ fontSize: '1.25rem', fontWeight: 700, marginBottom: '0.75rem' }}>Related Services</p>

<CardGroup cols={3}>
  <Card title="Polystack Compute" icon="server" href="/services/compute" color="#bf9667">
    Virtual machine instances that consume block storage volumes as persistent disks
  </Card>

  <Card title="Polystack Networking" icon="network-wired" color="#bf9667">
    Virtual networks and floating IPs used alongside compute and storage resources
  </Card>

  <Card title="Polystack Distributed Storage" icon="database" href="https://polystack.tech/" color="#bf9667">
    The distributed storage backend that powers block, object, and file storage
  </Card>
</CardGroup>