Hi,

I've been using Unraid with a single parity drive and really appreciate the ability to update the parity without waking up all other drives by simply flipping the bits on the parity drive. This feature significantly contributes to the longevity and efficiency of the setup.

 

Recently, I have been considering upgrading to a dual parity setup to enhance data protection. However, I am curious to know whether the smart parity updating mechanism (i.e., without waking up other drives) is retained in dual parity scenarios as well.

 

Does Unraid’s dual parity setup have a mechanism to update the parity drives when writing to the array, without waking up the other drives? Or does it require access to all drives to update the parity information like in typical RAID 6 setups? When I try to think about it I believe it would be logically impossible, but perhaps unraid has thought of some clever way I couldn't come up with.

 

Your insights and experiences with dual parity in Unraid, particularly regarding the parity update mechanism, would be highly valuable. Thank you in advance for sharing your knowledge!

 

Best regards, Time

In standard read/modify/write configuration, only the two parity drives and the drive being written to are active. 

 

37 minutes ago, timetraveler said:

enhance data protection

 

Having parity drives does nothing to protect the data, just FYI