Hello,
If I have this:
9x146GB and 3x450GB disk on EVA 4400 with 1 controller and 1 disk shelf and 1 disk group.
What is the best config for having the best protection?
- Protection lvl 1, vraid 5?
- Protection lvl none, vraid 6?
In my opinion, if i understood well, protection level it's just a reserved capacity on the disk group meaning that if one disk fail (let's say i have protection lvl 1, so 900 GB reserved on disk group), the information from the failed disk is rebuilt on the other disks to the reserved capacity without changing the disk (supposing EVA is full capacity used). EVA will do this anyway if i have protection level set none and enough free space (2xfailed disk), right?
If i set vRAID 6, it means that i'm safe with 2 PHYSICAL disks failed?
I know this is not a good config, mixing different capacity disks in the same group and loosing alot of space and performance, but in my situation i'll go for Protection lvl to none and vRAID 6. What do yo think? Also, vRAID 6 should be much faster on rebuilding then vRAID 5, but slower on write performance?
How EVA calculate estimated capacity for VRAID 6 given the config above?
LE: How EVA will make the RSS's? 2 RSS's, 6 physical disks per RSS?
Regards!