Hi guys
I know this topic has been abused to death but I added my first add-on disk shelf to current FAS 2240 and have some questions and concerns which I hope you can help me out with or at least confirm my results.
I have an aggregate with Raid-DP and Raid group size of 16, which netapp sets by default and is recommended.
This worked fine when we split the 24 drives between each aggr on each controller, which created the following:
Raid group for aggr (1 spares): 2 x parity + 8 x data
Not we added an extra 12 drives to this aggr which created the 2 x Raid groups:
Raid group 1: 2 x parity + 14 x data
Raid group 2: 2 x parity + 4 x data
This is of course not optimal, so how can fix this since we will not be purchasing any new shelve soon.
For sake of my own sanity I want to confirm my finding and see what you might think?
1. Leave aggregate as is?
2. Change the Raid group to 11 disks?
2 x parity + 9data = 2 Raid groups (this way it will spread the data disks evenly between RAID groups and when I add another shelve with 12 disks it will create another Raid group with similar disks layout.
does this require a reboot of controller where aggregate resides on?
3. Increase original raid Group to 22 disks?
Not sure this is possible since 2nd raid group already created and don't think possible to move drives from raid group 2 to one.
Lastly, currently out 2 x spare drives only sit on the primary shelf and we don't have any on the new shelf.
would this be an issue if a disk fails on the 2nd shelve?
if issue, how can I change this to have a single drive on each shelve as spare when I already added all the drives on 2nd shelve to aggregate?
Thanks in advance
Johann