RAID ADG Recovery

Attingo is able to reconstruct your lost data from RAID ADG (Advanced Data Guarding. This is an implementation for RAID 6 by Hewlett Packard and Compaq AG. It is often used with Compaq Smart Arrays, where the parity is calculated via complex Galois polynomials.

Data rescue from RAID ADG systems

• Two or more hard drives break down. Attingo will extract the data in the in-house clean room laboratory and reconstruct the virtual drive. 

• Data loss often happens due to errors inside the RAID controller (BIOS, software). Attingo is able to recontruct the lost data.

• After a firmware update data may be lost because of a changed storage order.

• Attingo recovers the data if the RAID ADG is degraded or offline.

Capacity of a RAID ADG

The sum of all hard drives minus two.

Build-up of a RAID ADG (RAID 6 / RAID 5DP) array

RAID ADG pros and cons

• In the worst case two or more hard drives break down. The array is no longer accesible and a data rescue is needed.

• In the best case only one or two hard drives break down. The system is still working and there is no data loss.

• To perform a successful data rescue, the so-called "generator syndrome" as well as the distribution of the input and parity blocks are necessary.