> For the complete documentation index, see [llms.txt](https://docs.ionos.com/cloud/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ionos.com/cloud/api-reference/cloud-api-v6/servers/attach-a-cd-rom.md).

# Attach a CD-ROM

Attachs a CD-ROM to an existing server specified by its ID.

CD-ROMs cannot be created stand-alone like volumes. They are either attached to a server or do not exist. They always have an ISO-Image associated; empty CD-ROMs can not be provisioned. It is possible to attach up to two CD-ROMs to the same server.

Note that attaching a CD-ROM leads to a reset of the server.

Attaching a CD-ROM to a server with Confidential Computing enabled (i.e. when one of the attached volumes uses a Confidential Computing image) is not allowed.

```json
{"openapi":"3.0.3","info":{"title":"CLOUD API","version":"6.0"},"tags":[{"name":"Servers"}],"servers":[{"url":"https://api.ionos.com/cloudapi/v6"}],"security":[{"BasicAuthentication":[]},{"TokenAuthentication":[]}],"components":{"securitySchemes":{"BasicAuthentication":{"type":"http","description":"You will need to base64 encode the string containing your credentials. <div style=\"padding: 15px; border: 1px solid #d1ecf1; background-color: #d1ecf1; color: #0c5460; margin-bottom: 15px;\">\n  <strong>Note:</strong><br/><br/>\n  <ul><li><b>Basic Authentication</b> is supported only when <b>2-Factor \n  Authentication</b> is not configured.</li>\n  <li>Users with <b>2-Factor \n  Authentication</b> activated must generate new 2FA-secured tokens in the DCD using [Token Manager](https://docs.ionos.com/cloud/set-up-ionos-cloud/management/identity-access-management/token-manager). \n  These tokens do not inherit the <b>2FA-secured</b> property by default.</li><li>Token deletion is only possible using the <b>Token Manager</b>.</li>\n</div> Separate your username and password with a colon, i.e., username:password and send it as 'Authorization' request header. More details: https://en.wikipedia.org/wiki/Basic_access_authentication","scheme":"basic"},"TokenAuthentication":{"type":"apiKey","description":"Please provide header value as 'Bearer <token>' and don't forget to add 'Bearer' HTTP Authorization Scheme before the token.","name":"Authorization","in":"header"}},"schemas":{"Image":{"required":["properties"],"type":"object","properties":{"id":{"type":"string","description":"The resource's unique identifier.","readOnly":true},"type":{"type":"string","description":"The type of object that has been created.","allOf":[{"$ref":"#/components/schemas/Type"}]},"href":{"type":"string","description":"URL to the object representation (absolute path).","format":"uri","readOnly":true},"metadata":{"$ref":"#/components/schemas/DatacenterElementMetadata"},"properties":{"$ref":"#/components/schemas/ImageProperties"}}},"Type":{"type":"string","enum":["datacenter","server","volume","nic","loadbalancer","location","firewall-rule","flow-log","image","snapshot","lan","ipblock","pcc","contract","user","group","collection","resource","request","request-status","s3key","backupunit","label","k8s","nodepool","template","networkloadbalancer","forwarding-rule","natgateway","natgateway-rule","node","applicationloadbalancer","target-group","security-group","gpu"]},"DatacenterElementMetadata":{"type":"object","properties":{"etag":{"type":"string","description":"Resource's Entity Tag as defined in http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.11  Entity Tag is also added as an 'ETag response header to requests which don't use 'depth' parameter.","readOnly":true},"createdDate":{"type":"string","description":"The last time the resource was created.","format":"date-time","readOnly":true},"createdBy":{"type":"string","description":"The user who created the resource.","readOnly":true},"createdByUserId":{"type":"string","description":"The unique ID of the user who created the resource.","readOnly":true},"lastModifiedDate":{"type":"string","description":"The last time the resource was modified.","format":"date-time","readOnly":true},"lastModifiedBy":{"type":"string","description":"The user who last modified the resource.","readOnly":true},"lastModifiedByUserId":{"type":"string","description":"The unique ID of the user who last modified the resource.","readOnly":true},"state":{"type":"string","description":"State of the resource. *AVAILABLE* There are no pending modification requests for this item; *BUSY* There is at least one modification request pending and all following requests will be queued; *INACTIVE* Resource has been de-provisioned; *DEPLOYING* Resource state DEPLOYING - relevant for Kubernetes cluster/nodepool; *ACTIVE* Resource state ACTIVE - relevant for Kubernetes cluster/nodepool; *FAILED* Resource state FAILED - relevant for Kubernetes cluster/nodepool; *SUSPENDED* Resource state SUSPENDED - relevant for Kubernetes cluster/nodepool; *FAILED_SUSPENDED* Resource state FAILED_SUSPENDED - relevant for Kubernetes cluster; *UPDATING* Resource state UPDATING - relevant for Kubernetes cluster/nodepool; *FAILED_UPDATING* Resource state FAILED_UPDATING - relevant for Kubernetes cluster/nodepool; *DESTROYING* Resource state DESTROYING - relevant for Kubernetes cluster; *FAILED_DESTROYING* Resource state FAILED_DESTROYING - relevant for Kubernetes cluster/nodepool; *TERMINATED* Resource state TERMINATED - relevant for Kubernetes cluster/nodepool; *HIBERNATING* Resource state HIBERNATING - relevant for Kubernetes cluster/nodepool; *FAILED_HIBERNATING* Resource state FAILED_HIBERNATING - relevant for Kubernetes cluster/nodepool; *MAINTENANCE* Resource state MAINTENANCE - relevant for Kubernetes cluster/nodepool; *FAILED_HIBERNATING* Resource state FAILED_HIBERNATING - relevant for Kubernetes cluster/nodepool.","readOnly":true,"enum":["AVAILABLE","INACTIVE","BUSY","DEPLOYING","ACTIVE","FAILED","SUSPENDED","FAILED_SUSPENDED","UPDATING","FAILED_UPDATING","DESTROYING","FAILED_DESTROYING","TERMINATED","HIBERNATING","FAILED_HIBERNATING","MAINTENANCE","FAILED_MAINTENANCE","UNKNOWN"]}}},"ImageProperties":{"required":["licenceType"],"type":"object","properties":{"name":{"type":"string","description":"The resource name."},"description":{"type":"string","description":"Human-readable description."},"location":{"type":"string","description":"The location of this image/snapshot.","readOnly":true},"size":{"type":"number","description":"The image size in GB.","readOnly":true},"cpuHotPlug":{"type":"boolean","description":"Hot-plug capable CPU (no reboot required)."},"cpuHotUnplug":{"type":"boolean","description":"Hot-unplug capable CPU (no reboot required)."},"ramHotPlug":{"type":"boolean","description":"Hot-plug capable RAM (no reboot required)."},"ramHotUnplug":{"type":"boolean","description":"Hot-unplug capable RAM (no reboot required)."},"nicHotPlug":{"type":"boolean","description":"Hot-plug capable NIC (no reboot required)."},"nicHotUnplug":{"type":"boolean","description":"Hot-unplug capable NIC (no reboot required)."},"discVirtioHotPlug":{"type":"boolean","description":"Hot-plug capable Virt-IO drive (no reboot required)."},"discVirtioHotUnplug":{"type":"boolean","description":"Hot-unplug capable Virt-IO drive (no reboot required). Not supported with Windows VMs."},"discScsiHotPlug":{"type":"boolean","description":"Hot-plug capable SCSI drive (no reboot required)."},"discScsiHotUnplug":{"type":"boolean","description":"Hot-unplug capable SCSI drive (no reboot required). Not supported with Windows VMs."},"exposeSerial":{"$ref":"#/components/schemas/ExposeSerial"},"requireLegacyBios":{"$ref":"#/components/schemas/RequireLegacyBios"},"licenceType":{"type":"string","description":"The OS type of this image."},"applicationType":{"$ref":"#/components/schemas/ApplicationType"},"imageType":{"type":"string","description":"The image type.","readOnly":true,"enum":["HDD","CDROM","UNKNOWN"]},"public":{"type":"boolean","description":"Indicates whether the image is part of a public repository.","readOnly":true},"imageAliases":{"type":"array","description":"List of image aliases mapped for this image","readOnly":true,"items":{"type":"string"}},"requiredFeatures":{"type":"array","description":"The list of features required by this image. If `SEV-SNP` is part of this list, then the image supports Confidential Computing.","readOnly":true,"items":{"type":"string"}},"cloudInit":{"type":"string","description":"Cloud init compatibility.","enum":["NONE","V1"]}}},"ExposeSerial":{"type":"boolean","description":"If set to `true` will expose the serial id of the disk attached to the server. If set to `false` will not expose the serial id. Some operating systems or software solutions require the serial id to be exposed to work properly. Exposing the serial  can influence licensed software (e.g. Windows) behavior","default":false},"RequireLegacyBios":{"type":"boolean","description":"Indicates if the image requires the legacy BIOS for compatibility or specific needs.","default":true},"ApplicationType":{"type":"string","description":"The type of application that is hosted on this resource.  Only public images can have an Application type different than UNKNOWN."},"Error":{"type":"object","properties":{"httpStatus":{"type":"integer","description":"HTTP status code of the operation.","format":"int32","readOnly":true},"messages":{"type":"array","items":{"$ref":"#/components/schemas/ErrorMessage"}}}},"ErrorMessage":{"type":"object","properties":{"errorCode":{"type":"string","description":"Application internal error code.","readOnly":true},"message":{"type":"string","description":"A human-readable message.","readOnly":true}}}}},"paths":{"/datacenters/{datacenterId}/servers/{serverId}/cdroms":{"post":{"tags":["Servers"],"summary":"Attach a CD-ROM","description":"Attachs a CD-ROM to an existing server specified by its ID. \n\nCD-ROMs cannot be created stand-alone like volumes. They are either attached to a server or do not exist. They always have an ISO-Image associated; empty CD-ROMs can not be provisioned. It is possible to attach up to two CD-ROMs to the same server. \n\nNote that attaching a CD-ROM leads to a reset of the server.\n\nAttaching a CD-ROM to a server with Confidential Computing enabled (i.e. when one of the attached volumes uses a Confidential Computing image) is not allowed.","operationId":"datacentersServersCdromsPost","parameters":[{"name":"datacenterId","in":"path","description":"The unique ID of the data center.","required":true,"schema":{"type":"string"}},{"name":"serverId","in":"path","description":"The unique ID of the server.","required":true,"schema":{"type":"string"}},{"name":"pretty","in":"query","description":"Controls whether the response is pretty-printed (with indentations and new lines).","schema":{"type":"boolean","default":true}},{"name":"depth","in":"query","description":"Controls the detail depth of the response objects. \nGET /datacenters/[ID]\n\t- depth=0: Only direct properties are included; children (servers and other elements) are not included.\n\t- depth=1: Direct properties and children references are included.\n\t- depth=2: Direct properties and children properties are included.\n\t- depth=3: Direct properties and children properties and children's children are included.\n\t- depth=... and so on","schema":{"maximum":10,"minimum":0,"type":"integer","format":"int32","default":0}},{"name":"X-Contract-Number","in":"header","description":"Users with multiple contracts must provide the contract number, for which all API requests are to be executed.","schema":{"type":"integer","format":"int32"}}],"requestBody":{"description":"The CD-ROM to be attached.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/Image"}}},"required":true},"responses":{"202":{"description":"Successful operation","headers":{"X-RateLimit-Remaining":{"description":"The number of requests that can still be made without triggering a failure response.","schema":{"type":"integer","format":"int32"}},"X-RateLimit-Limit":{"description":"The average number of requests per minute allowed.","schema":{"type":"integer","format":"int32"}},"X-RateLimit-Burst":{"description":"The maximum number of concurrent API requests allowed.","schema":{"type":"integer","format":"int32"}},"Location":{"description":"Callback URL to poll async operation status.","schema":{"pattern":"https://[apiBaseUri]/requests/[requestId]/status","type":"string"}}},"content":{"application/json":{"schema":{"$ref":"#/components/schemas/Image"}}}},"default":{"description":"Any erroneous status code: 400 (parse error), 401 (auth error), 402 (trial access), 403 (insufficient privileges), 404 (not found), 405 (unsupported HTTP method), 415 (unsupported content type, 422 (validation error), 429 (request rate limit exceeded), 500 (server error), or 503 (maintenance).","content":{"application/json":{"schema":{"$ref":"#/components/schemas/Error"}}}}}}}}}
```


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.ionos.com/cloud/api-reference/cloud-api-v6/servers/attach-a-cd-rom.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
