Non-standard RAID levels – Wikipedia, What are the pros and cons of RAID-6? What is RAID-DP?, RAID-DP Reconstruction. If a double disk failure occurs, RAID-DP automatically raises the priority of the reconstruction process so the recovery completes more quickly. As a result, the time to reconstruct data from two failed disks is slightly less than the time to reconstruct data from a single disk failure.
RAID-DP. RAID-DP is proprietary NetApp RAID implementation available only in ONTAP systems. RAID DP implements RAID 4, except with an additional disk that is used for a second parity, so it has the same failure characteristics of a RAID 6. The performance penalty of RAID-DP is typically under 2% when compared to a similar RAID 4 configuration.
5/8/2007 · Generally speaking, dual-parity RAID ( RAID – DP ) is a proprietary, vendor specific implementation of dual parity. RAID -6 dual parity is nothing new; it’s been around since the 1990s. It never really took off because of the added drive cost and performance impact. However, RAID -6 and its proprietary versions are finally being embraced because of the high rebuild times of today’s high.
RAID-DP is a double parity protection in a RAID group. RAID-DP on NetApp is supported using 14 Data Drives and 2 Parity Disk. A traditional RAID 4 is implemented with horizontal parity structure. On RAID-DP the same principles are used to calculate the parity, the Double Parity (DP) calculations are done diagonally using row components. With a single disk failure, RAID-DP will treat it as a normal failure.
4/11/2012 · There are many ways to accomplish this, but no other option has the high resiliency and low performance overhead of RAID – DP . Learn more by watching this short video.
RAID-DP. With RAID-DP protection, ONTAP can use up to two spare disks to replace and reconstruct the data from up to two simultaneously failed disks within the RAID group. RAID-TEC. With RAID-TEC protection, ONTAP can use up to three spare disks to replace and reconstruct the data from up to three simultaneously failed disks within the RAID group.
In computer storage, the standard RAID levels comprise a basic set of RAID (Redundant Array of Independent Disks or Redundant Array of Inexpensive Disks) configurations that employ the techniques of striping, mirroring, or parity to create large reliable data stores from multiple general-purpose computer hard disk drives (HDDs). The most common types are RAID 0 (striping), RAID 1 …
