Releasing node disks

During a disk release, its data is safely migrated to other disks, which takes time. To avoid data loss, wait until data migration is complete.

Limitations

• A graceful release of a storage disk is possible only if the remaining disks in the storage cluster can comply with the configured redundancy scheme. You can, however, release a disk forcibly without data migration, but it will make the cluster degraded and trigger the cluster self-healing.

Prerequisites

• Before replacing a disk with the Metadata, Cache, or Metadata+Cache role, the same role is assigned to a new disk, and then the old disk is released.
• If you want all disks with the Storage role to be assigned automatically after replacement, automatic configuration of new disks must be enabled, as described in Configuring new storage disks automatically.

To release a disk from the storage cluster

1. On the Infrastructure > Nodes screen, click the name of the node to configure.
2. On the Disks tab, select the disk to replace, and then click Release.
3. (Optional, highly not recommended) To release the disk without data migration, select Release without data migration.
4. Click Yes.

When the data migration from the disk completes, the disk will be displayed as Unassigned on the Disks tab and can be replaced with a new one.