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What Do I Do If I Cannot Log In to My BMS or the BMS EVS Disk Is Lost After the BMS Is Started or Restarted? Symptom After a BMS is started or restarted, the user cannot log in to the BMS or the BMS EVS disk is lost.
After the modification, format the EVS disk.
Why Is the EVS Disk Size Not Updated in the BMS OS After the EVS Disk Capacity Has Been Expanded? If this occurs, scan block devices in the BMS OS. Take the sdh disk of Red Hat as an example, run the echo 1 > /sys/block/sdh/device/rescan command. Parent topic: Disk FAQ
EVS Disk What Is Elastic Volume Service (EVS)? EVS offers scalable block storage for BMSs.
How Do I Know Whether EVS Disks Are Available in a Flavor? Some BMSs do not support EVS disks because the BMSs do not have SDI iNICs or for other reasons. Therefore, certain flavors with EVS disks unavailable are provided for creating such BMSs.
Detaching an EVS Disk from a BMS (Deprecated) Function This API is used to detach an EVS disk from a BMS. This API has been deprecated. Use the API in Detaching an EVS Disk from a BMS.
If you need to attach an EVS disk to an existing BMS, Device Type of the EVS disk must be SCSI. If you need to create an EVS disk and attach it to the BMS, you must select SCSI in Advanced Settings when you create the EVS disk. Parent topic: Disk FAQ
Figure 6 Attaching an EVS disk (before the BMS restart) Figure 7 Attaching an EVS disk (after the BMS restart) Figure 8 Detaching an EVS disk (before the BMS restart) Figure 9 Detaching an EVS disk (after the BMS restart) To identify EVS disks, log in to the BMS and run the lsscsi
You can obtain the BMS ID from the BMS console or by calling the API Querying BMSs (Deprecated). attachment_id Yes Specifies the IDs of EVS disks attached to the BMS. You can obtain the IDs of EVS disks attached to a BMS using the Querying EVS Disks Attached to a BMS API.
Querying EVS Disks Attached to a BMS Function This API is used to query EVS disks attached to a BMS. URI GET /v1/{project_id}/baremetalservers/{server_id}/os-volume_attachments Table 1 lists the parameters.
Querying Information About EVS Disks Attached to a BMS (Deprecated) Function This API is used to query information about EVS disks attached to a BMS. This API has been deprecated. Use the API in Querying EVS Disks Attached to a BMS.
How Do I Obtain the Drive Letter of an EVS Disk? After a BMS is restarted, the drive letter of an EVS disk attached to the BMS may change. This section describes how to find the mapping between an EVS disk and its drive letter.
Attaching an EVS Disk to a BMS (Deprecated) Function This API is used to attach an EVS disk to a BMS. This API has been deprecated. Use the API in Attaching an EVS Disk to a BMS. Constraints A bootable disk cannot be attached to a BMS.
How Do I Handle a Network Failure After Services Are Switched from a Windows BMS Booted from an EVS Disk to an HA BMS? Scenarios After services are switched from a Windows BMS booted from an EVS disk to an HA BMS, the HA BMS cannot connect to the network.
You can obtain the BMS ID from the BMS console or by calling the API Querying BMSs (Deprecated). volume_id Yes Specifies the EVS disk ID. You can query attached EVS disks attached to a BMS using the Querying Information About EVS Disks Attached to a BMS (Deprecated) API.
What Are the Advanced Features of BMSs Using EVS Disks? BMSs that use EVS disks as their system disks can be provisioned within a shorter time, which facilitates quick service recovery.
Attaching an EVS Disk to a BMS Function This API is used to attach EVS disks to a BMS as data disks after the BMS is created if existing data disks are insufficient or cannot meet requirements. Constraints EVS disks cannot be attached to a BMS in a batch.
(Optional) Installing the SDI Driver With the SDI driver, EVS disks can be attached to BMSs. The EVS disks can be used as system disks from which the BMSs are booted. This facilitates quick BMS provisioning.
When you create a BMS, you can select one from the following storage types: Elastic Volume Service (EVS): provides EVS disks of different QoS configurations to meet performance requirements in various scenarios.
Device Type of the EVS disk must be SCSI. A non-shared EVS disk must be in Available state. A shared EVS disk must be in In-use or Available state. BMSs using some flavors or images cannot have EVS disks attached because the servers do not have SDI iNICs or for other reasons.
