RAID 1: This configuration mirrors data across multiple disks. Thus, each disk contains an exact copy of the data. The image of the RAID 1 volume will be identical to the images taken from the individual disks because each disk has the same data.
RAID 0: As described above, the images will differ because the data is striped across multiple disks.
RAID 5 and RAID 6: These configurations involve striping with parity (RAID 5) or double parity (RAID 6). While the data is distributed across the disks, the parity information affects how the data is reconstructed. Images taken of the entire RAID volume will differ from images taken of individual disks because the parity and data distribution make each disk's image incomplete on its own.
D < https://nvlpubs.nist.gov/nistpubs/Legacy/IR/nistir7276.pdf
.... due to the nature of a RAID systems operation, the apparent accuracy of disk images can be impacted. For example, if a RAID is imaged through the hardware controller the resulting image will most likely be different than if each participating hard drive is imaged separately.
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