Pattern to record: A partition tool reports an unexpected size or layout while the array configuration is uncertain.

Identify the storage layer

RAID metadata describes member order and array layout; it is separate from the file system inside the assembled volume. Record the controller, RAID level and physical drive order before import, rebuild or file-system repair. A partition table normally describes the logical disk presented by the array; interpreting a member as that disk can produce misleading results.

Protect data before repair

Do not initialise, reorder or rebuild uncertain members automatically. Do not write partition repairs to individual members as though they were independent disks.

Evidence to check on the protected copy

1. Record drive order and controller details and image unstable members before importing anything.
2. Preserve member order and establish the correct logical disk before comparing partition records on an image.

Recovery and verification

If the checks support this cause, recover the proven partition layout only after array geometry is established. Verification should cover array assembly, share access, redundancy state, restart and independent backup.

For an assessment of your RAID or NAS system, contact AEPC in Burswood or call 027 908 8880. Provide the model and the conditions that reproduce this problem. Workshop visits are by appointment.