NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Fully understanding Xraid2
Hi,
I have just recieved my ReadyNAS Ultra 4 with 2 2TB drives. They are seagates so just to be safe, I am testing them with seatools, which will take many hours.
While that is happening I thought I would read up on the different types of raid. Xraid2 sounds impressive and mentions that it will mirror the contents of my data but this is what I do not understand. I have read the documentation and this explanation .. http://www.readynas.com/?cat=54 . What confuses me is this though. I do understand that if I have 2 drives, the contents of drive 1 will be duplicated to the contents of drive 2, much like raid1.
What I do not understand though is that the guide says that if you add a further 2 disks to your NAS so that you have 4 in total, then you will have the capacity of the 1st 3 discs and the 4th disc will act as the mirror. How can this be though, if I fill up the contents of the 1st 3 discs how can the 4th disc mirror all of that data if I was to fill them 100%? Surely I would need 6 discs?? 3 drives mirrored onto another 3 drives???
I just need to understand and know 100% that my data will be safe, otherwise I will have to use good old raid1.
I have just recieved my ReadyNAS Ultra 4 with 2 2TB drives. They are seagates so just to be safe, I am testing them with seatools, which will take many hours.
While that is happening I thought I would read up on the different types of raid. Xraid2 sounds impressive and mentions that it will mirror the contents of my data but this is what I do not understand. I have read the documentation and this explanation .. http://www.readynas.com/?cat=54 . What confuses me is this though. I do understand that if I have 2 drives, the contents of drive 1 will be duplicated to the contents of drive 2, much like raid1.
What I do not understand though is that the guide says that if you add a further 2 disks to your NAS so that you have 4 in total, then you will have the capacity of the 1st 3 discs and the 4th disc will act as the mirror. How can this be though, if I fill up the contents of the 1st 3 discs how can the 4th disc mirror all of that data if I was to fill them 100%? Surely I would need 6 discs?? 3 drives mirrored onto another 3 drives???
I just need to understand and know 100% that my data will be safe, otherwise I will have to use good old raid1.
NETGEAR Academy
Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!
