Replace and evacuate the data from Slicestor devices

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A Slicestor® device can be replaced and its data can be evacuated to another device.

The device that is moving out of the storage pool is called the source device, and the device that is moving in to the storage pool is called the destination device. Before a source device is replaced, the following internal checks must pass:

  • The storage pools that contain the source and destination devices must be updated to ClevOS 3.4.0.0 or later.
  • The destination device must have a capacity equal to or greater than the source device.
  • The destination device must be reimaged if it previously contained data.
    Note: When a Slicestor appliance is reimaged and approved, it takes some time before device is available to be used. The Slicestor appliance can be used when the following event is generated in event console: 
    Slicestor started for the first time.
  • Both the source and destination device must not already be a part of an ongoing device replacement.
  • The replacement process must not impact vault health.

  • When evacuating data from more than one device, the storage pool must be healthy. The maximum number of devices you can evacuate in parallel is equal to the difference between the vault Width and Alert Level, and is also dependent on the current health of the pool.

    For example, if a storage pool has 16 devices and a 16/9/11/13 vault, you can evacuate up to three devices at a time without affecting the pool's health. Attempting to evacuate a fourth device brings the vault below the Alert Level and is considered unsafe. Similarly, if two of those devices are already unhealthy, you can evacuate only one device.

Attention: Data cannot be evacuated during data reallocation. Execute any planned data evacuations before expanding storage pools. The system should be in as healthy a state as before performing expansion: replace any bad drives, perform any evacuations, and so on.

After data reallocation starts, drives can be replaced, but devices that are replaced during data reallocation will not evacuate data. Do not replace devices during data reallocation; all data slices on the old device are lost.