Can anyone advise me what the max number of partitioned disks is on an AFF system POST installation is? I know 48 disks can only be used at system initialisation but wanted to know how many after this can be added? This is a non metro cluster system. Struggling to find an official answer.
#Maximum number of partitioned disks on AFF system using ADPv2
reef jackal
alpine scaffold
AFAIK - you can do a lot but manually. However you eventually will start to use a lot of useable due to the root part not really being needed.
as an example. - aggr configs like this with AFF are fine. -
reef jackal
Yeh i get the point you lose a little for the roots as they the root aggrs are already built and will just sit there and do nothing, but it beats having to reserve a full non partitioned disk per node in the pair which in our case would be 2x7.4TB disks, we only lose 9.3Gb per disk to root as it is. We only need to partition another 42 disks, so still worth it.
just need to know the max number from a support pov, which I am struggling to get, even with a support case
cinder sequoia
No maximum defined per se. It just becomes 100% manual to achieve.
What size are the extra SSDs? Same as the partitioned?
reef jackal
yeh all same, we have 90 drives all 7TB, first 48 were partitioned as you would expect, then rest just sat there as full fat disks
cinder sequoia
Good. This is simple to do in your configuration.
reef jackal
yeh i am cool with the create-partition process, it was more if there was a documented maximum I wasnt aware of
support are quoting a max of 48 drives to me
ive just pushed back for them to check on what this can be post initialisation
cinder sequoia
Support is correct in terms of maximum drives that can be done at initialization. ONTAP will not support more than 48x drives to spread the root aggregate.
But you can grow well beyond that; it’s just a manual process instead of automatic.
reef jackal
does it just become a question of what is the maximum drive count generally for the HA pair as per HWU/
?
cinder sequoia
As long as you’re okay with losing space per drive (which it sounds like you are) and managing it yourself, then go for it.
Maximum drive counts are maximum drive counts. Period. Partitions are not included in that count.
reef jackal
yeh cool, we want an even split of the drives across the pair so didnt want to lose more drives\capacity to spares etc