Exploring RAID 0 Capabilities

Can additional disks be added to an existing RAID 0?

In practical terms, no. The only viable option is to back up the data from the array, recreate the array by adding disks, and then restore the data from the backup.

Can disks be removed from a RAID 0 on the go?

No, as the fundamental concept of RAID 0 does not support hot spare or hot swap functionality. Removing a disk causes the entire array to fail.

Is it feasible to use different disks in RAID 0?

  • Disks from different vendors: Yes, if the disks share the same characteristics (capacity, type, and RPM).
  • Disks with different capacities: Not advisable, as the array capacity is determined by the smallest disk, leaving unused space on larger disks.
  • Disks of different types (e.g., SSD and HDD) or rotational hard drives with varying RPM: Not recommended, as array performance is constrained by the slowest disk's read/write speed.
  • Disks with different ages: The age of the disks used in RAID 0 does not impact functionality.

Can RAID 0 be created on disks with existing data without data loss?

No. To create RAID 0 on such disks while preserving data, it is necessary to back up all data, create the RAID 0 configuration, and then restore the data to the array from the backup.

Is it possible to transfer RAID 0 member disks between similar devices and expect the array to work?

Generally no, but specific cases should be directed to the device vendor. If attempting to transfer RAID 0 yourself, maintaining parameters such as block size, disk order, and start offset is crucial for success. Tips for arrays configured with default settings include verifying the devices' similarity and ensuring correct disk order during the transfer.

Can multiple ports of a RAID controller be used for RAID 0 and the remaining ports for another array of a different level?

Typically, yes. Most controllers support multiple arrays per controller, provided the minimum disk requirements are met.

Can a RAID 0 be transformed into a different array layout without data loss?

For software RAID 0 (e.g., Windows or mdadm in Linux), no. For hardware RAID controllers, consult the controller manual for guidance.

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