> ## Documentation Index > Fetch the complete documentation index at: https://help.onetsolutions.net/llms.txt > Use this file to discover all available pages before exploring further. # [Volumes] Resize a storage volume > Increase the size of a storage volume. Volumes can only be expanded, not shrunk. After resizing, you may need to extend the filesystem within the guest OS to use the additional space. Hot-resize is supported for attached volumes. ## OpenAPI ````yaml https://api.onetsolutions.net/schema post /v1/organizations/{organization_id}/projects/{project_id}/compute/volumes/{id}/resize openapi: 3.0.3 info: title: OnetSolutions API version: v1 (v1) description: > ## Overview The OnetSolutions API provides programmatic access to manage your cloud infrastructure, domains, and web hosting services. ## Authentication All API requests require authentication using one of the following methods: - **JWT Token**: Obtain a token via login endpoints and include it in the `Authorization: Bearer ` header - **API Key**: Generate an API key from your account settings and use it as `Authorization: Bearer sk-onetsolutions-...` ## Rate Limiting API requests are rate-limited to ensure fair usage: - **Standard**: 1000 requests per minute - **Burst**: 100 requests per second ## Pagination List endpoints return paginated results. Use `page` and `page_size` query parameters. ## Error Handling The API uses standard HTTP status codes: - `200` Success - `201` Created - `400` Bad Request - `401` Unauthorized - `403` Forbidden - `404` Not Found - `429` Too Many Requests servers: - url: https://api.onetsolutions.net description: Production security: [] tags: - name: Authentication description: >- Login, passwordless authentication, MFA, OAuth providers, and token management. - name: Organizations description: >- Organization management, members, roles, modules, audit logs, and notification settings. - name: Projects description: Project management, team members, and project-scoped resources. - name: Compute description: >- Cloud instances, volumes, snapshots, backups, VPCs, firewalls, SSH keys, uptime monitors, and instance tasks. - name: Domains description: >- Domain availability, registration, transfers, DNS zones, DNS records, and TLD information. - name: Web Hosting description: >- cPanel-based web hosting, emails, databases, subdomains, FTP accounts, addon domains, and SSL certificates. paths: /v1/organizations/{organization_id}/projects/{project_id}/compute/volumes/{id}/resize: post: tags: - Compute summary: '[Volumes] Resize a storage volume' description: >- Increase the size of a storage volume. Volumes can only be expanded, not shrunk. After resizing, you may need to extend the filesystem within the guest OS to use the additional space. Hot-resize is supported for attached volumes. operationId: resize_volume parameters: - in: path name: id schema: type: string description: Unique identifier of the storage volume. required: true - in: path name: organization_id schema: type: string description: Unique identifier of the organization that owns the resource. required: true - in: path name: project_id schema: type: string description: Unique identifier of the project containing the resource. required: true requestBody: content: application/json: schema: $ref: '#/components/schemas/InstanceVolume' required: true responses: '200': description: Volume resize initiated successfully '400': description: Invalid size or resize configuration '401': description: Authentication credentials missing or invalid '403': description: Insufficient permissions or storage quota exceeded '404': description: Volume not found '409': description: Another volume operation is in progress security: - BearerAuth: [] components: schemas: InstanceVolume: type: object properties: id: type: string format: uuid readOnly: true name: type: string description: Volume name maxLength: 255 size_gb: type: integer maximum: 4294967295 minimum: 0 format: int64 description: Volume size in GB status: enum: - pending - creating - available - attached - detached - deleting - deleted - error type: string description: |- * `pending` - Pending * `creating` - Creating * `available` - Available * `attached` - Attached * `detached` - Detached * `deleting` - Deleting * `deleted` - Deleted * `error` - Error x-spec-enum-id: 846eb9b3e36e98dc readOnly: true disk_type: enum: - ssd - nvme - unknown type: string x-spec-enum-id: 44a7f459d03fa685 description: |- Disk type (ssd, nvme) * `ssd` - SSD * `nvme` - NVMe * `unknown` - Unknown instance: allOf: - $ref: '#/components/schemas/InstanceSummary' readOnly: true instance_id: type: string format: uuid writeOnly: true nullable: true location: allOf: - $ref: '#/components/schemas/DatacenterLocation' readOnly: true location_id: type: string format: uuid writeOnly: true price_monthly: type: string pattern: ^-?\d{0,8}(?:\.\d{0,2})?$ readOnly: true description: Prix mensuel is_active: type: boolean readOnly: true created: type: string format: date-time readOnly: true modified: type: string format: date-time readOnly: true required: - created - id - instance - is_active - location - location_id - modified - name - price_monthly - size_gb - status InstanceSummary: type: object properties: id: type: string format: uuid readOnly: true legacy_id: type: integer readOnly: true name: type: string readOnly: true description: Instance name hostname: type: string readOnly: true description: Instance hostname status: enum: - pending - provisioning - active - suspended - terminated - cancelled type: string x-spec-enum-id: 37bb200cd5c75d35 readOnly: true description: |- Billing status * `pending` - Pending * `provisioning` - Provisioning * `active` - Active * `suspended` - Suspended * `terminated` - Terminated * `cancelled` - Cancelled primary_ipv4: type: string format: uuid readOnly: true nullable: true description: Primary IPv4 address primary_ipv6: type: string format: uuid readOnly: true nullable: true description: Primary IPv6 address required: - hostname - id - legacy_id - name - primary_ipv4 - primary_ipv6 - status DatacenterLocation: type: object properties: id: type: string format: uuid readOnly: true name: type: string description: 'Ex: Paris DC1, Frankfurt DC2' maxLength: 100 slug: type: string maxLength: 50 pattern: ^[-a-zA-Z0-9_]+$ country_code: type: string description: 'Ex: FR, DE' maxLength: 2 is_active: type: boolean created: type: string format: date-time readOnly: true modified: type: string format: date-time readOnly: true required: - country_code - created - id - modified - name - slug securitySchemes: BearerAuth: type: http scheme: bearer bearerFormat: JWT or API Key description: >- Use `Authorization: Bearer ` header. Token can be a JWT token or an API key (format: `sk-onetsolutions-...`). ````