Hello,
I have read the instructions of the afformentioned video and I have some questions arround the fact of adding/ replacing a parity drive in the array.
Well my array consists of 3 3TB (NAS) hard drives. The description of video is similar to mine with the exception of 1 TB drive data.
First of all I would like to ask if the aformentioned video corresponds to a 0% data loss scenario. What I am asking is: Am I sure that, after applying the instructions of the afformentioned video, Iam not going to lose any data? Please explain it to me with every material you have. I am going sometime in the future to do the following:
1) Remove deliberately one data disk from array (preferably the 96% full of capacity) and start the array without him.
2) Stop the array and shutdown pc
3) Replace the 3TB parity drive with a 10TB parity drive (both NAS)
4) Plug to new sata port the new (future) parity drive
5) Start up pc
6) In the array details and before starting the array replace old parity with the new one and in the empty slot where I had the old data drive, I place the old parity drive (both should be blue icons after this)
7) Then I check the checkbox to copy, right besides the start array button and start it.
So after finishing these steps, am I going to be sure that nothing is lost, as far as data is concerned?
A second option, but also a question is, to add another parity drive of 10TB(NAS), as a second parity drive, since I already have the choice to add a second parity drive and perform the above procedure some other time in the future, with the smallest parity drive of 3TB.
Another question is more like an assumption. Are we sure that 0% data loss is ensured by the fact that there is 1 parity of 3TB versus 2 data disks of 6TB in total? Shouldn't I have another parity of 3TB to be sure that I do not lose data? Had I 2 parity disks (3TB each), it conpensates the fact that I am not going to lose data since I have 2 data disks (3TB each). 2 x 3 TB of parity = 2 x 3TB of data = 6TB.
This is very important!
Please correct me to any of the aformentioned steps and inform me about the correctness of both options.