FAS2520 cDOT8.3 can't create data aggregate

[TonyWu]

Hi Everyone,

Please advise is there any special command is required to create a data aggregate for FAS2520 cDot 8.3 RC1 (New System)

Configuration is 4 x 200GB SSD and 8 x 2TB NL-SAS

The system already created 2 AG, and with 11TB free space, but it prompts error with "job failed: failed to create aggregate "aggr1_1" on cluster1-01.  Reason: 4 disks specified, but at least 5disks are required for RAID-DP."

The command I used as below:

aggr create -aggregate aggr1-1 -node cluster1-01 -diskcount 4

Please advise what command should I use to create aggregate from the free space 

Many Thanks.

Best Regards,

Tony

[shatfield]

Like the error says, you don't have enough spare disks to create an aggregate.

The 4 you do have are should be the SSDs.  Typically you'd add those to a disk pool and assign cache capacity to your HDD aggregates.  

Before you go there however, look at the existing aggr layout.  Make sure its laid out as you intended before you commit the SSDs.

[TonyWu]

Hi SHATFIELD,

I didn't mean to create the aggregate by the SSD because I created the Storage Pool with the 4 x 200 GB SSD already

Pleaes advise what command I can use to add the aggregate from the NL-SAS

I want to use the spare spare to create volume for NAS.  

I am newbie to learn NetApp because advise and thanks in advance.

Best Regards,

Tony

[shatfield · Accepted solution]

That makes more sense now.   

So Autoassign left you with a 50/50 split.  Which in this case leaves 4 data partitions on each node, not enough to create the aggr.   With only 8 drives to play with, I would reassign ownership of all the data partitions over to one node, then create the aggregate on that node.  

in advanced priv level, use disk removeowner and disk assign with the -data true flag to juggle ownership of the data slices.

Then aggr create should succeed.

If you really want a 50/50 split, you can override the 5 disk minimum with the -force-small-aggregate true flag in advanced priviledge level.

[TonyWu]

Hi,

I created with the small aggregate switch

Please advise how to enforce the other way you mentioned in the post becaus I am not very familiar with NetApp feature yet.

Thanks.

Tony

[emyonah]

3.1.0 745.0GB 1 0 SSD shared aggr0_CLUSTER_03_0
NODE-03
3.1.1 745.0GB 1 1 SSD shared ggr0_CLUSTER_03_0
NODE-033
3.1.2 745.0GB 1 2 SSD shared ggr0_CLUSTER_03_0
NODE-03
3.1.3 745.0GB 1 3 SSD shared ggr0_CLUSTER_03_0
NODE-03
3.1.4 745.0GB 1 4 SSD shared ggr0_CLUSTER_03_0
NODE-03

Usable Disk Container Container
Disk Size Shelf Bay Type Type Name Owner
---------------- ---------- ----- --- ------- ----------- --------- --------
3.1.5 745.0GB 1 5 SSD shared ggr0_CLUSTER_03_0
NODE-03
3.1.6 745.0GB 1 6 SSD shared ggr0_CLUSTER_03_0
NODE-03
3.1.7 745.0GB 1 7 SSD shared ggr0_CLUSTER_03_0
NODE-03
3.1.8 745.0GB 1 8 SSD shared ggr0_CLUSTER_03_0
NODE-03
3.1.9 745.0GB 1 9 SSD shared - ggr0_CLUSTER_03_0
NODE-03

Usable Disk Container Container
Disk Size Shelf Bay Type Type Name Owner
---------------- ---------- ----- --- ------- ----------- --------- --------
3.1.10 745.0GB 1 10 SSD shared ggr0_CLUSTER_03_0
NODE-03