SNAP RAIDS come either built into the motherboard (MLB, main logic board) or are plug in to the PCI slot 32bit or 64bit.
Raid Failures: Raid 5, Raid 10, Raid 50
Broken Raid - More than one drive is out of the raid during operation and it fails the raid. Most times this happens while the raid is in a crippled state and trying to replace the bad drive a good drive is pulled or replaced while the raid is powered off. Both will result in a Failed Raid.
THIS IS A RECOVERABLE STATE
Bad Risk Table or Parity Loss - The risk tables have been over written with a new configuration or the Raid has lost the parity. This usually happens trying to correct the broken raid problem, upgrades, big mistakes or employee sabotage and gets worse trying to correct the problem.
THIS IS A RECOVERABLE STATE
ROM UPGRADES - flashing rom bios on a lot of the PERC raid controllers and others will cause the drives to not be recognized. This happens due to the changes in the firmware to recognize the partition. Replacing the old firmware will not help.
THIS IS A RECOVERABLE STATE
Failed Hard Drives - Two or more drives fail on raid at same time. This is just plain old hard drive failure that must occur at sometime. Sometimes it’s more than one drive and there comes the problem. The raid can only have one failure unless it’s a mirrored raid.
THIS IS RECOVERABLE ONLY IF ONE OF THE DRIVES IS RECOVERABLE OUT OF THE TWO. ONLY ONE OF THE DRIVES CAN BE FAILED FOR RECOVERY. THE RAID IS BROKEN AT THIS POINT.
By using specialized techniques Data Recovery Zone can perform a data exctraction if the RAID consist of more than 5 drives.