Adding shelf to an existing aggregate

[brasbehlph]

I am trying to add a shelf of 14 disks to the following configuration.

Fas2020 single head

#base unit 300 15k Sata

volume aggr0 (1 RAID group):

         group 0: 11 disks

#shelf1 500GB 7,2k Sata

volume aggr1 (1 RAID group):

         group 0: 14 disks

I would like to add more spindles to aggr1 but when testing adding 5 disks I get the following error message.

"not all disks used; a raid_db raid group must have at least 3 disks netapp"

I imagine the default raid size of 16 is causing this error.

What option would be best? Are these the only options?

1. Add aggr2 for the entire shelf with its on raid group

2. Add all disks to aggr1 and let it configure the second raid group on aggr1

Thanks in advance

[peter_lehmann · Accepted solution]

It depends if these disks you wnat to add are the same as the 14 disks already in aggr1...

I'd add them to aggr1, but first set the raidgroup size to 1, then you'll get a bigger aggr1 with 2 RG's each of 14 disks.

But also keep in mind to have "enough" sparedisks !

Peter

[radek_kubka]

first set the raidgroup size to 1

You mean 14? (just double-checking )

[peter_lehmann]

Yes... 14 !

thanks

[brasbehlph]

Sounds great, I will get this applied after hours tonight.

I think I can use the following command to change the raidsize to 14.

>aggr options aggr1 raidsize 14

Next I will try to add disks to aggr1 assigning it to a new raid group (rg1)

>aggr add aggr1 -g rg1 -d disk_list

Is it not possible to do these command through "NetApp System Manager"?

thanks

[radek_kubka]

I haven't played a lot with System Manager 2.0, but I don't think this is doable via GUI.

[brasbehlph]

Worked perfectly but I had to change the second command.

After changing the raidsize to 14:

aggr options aggr1 raidsize14

I had to let the filer create the new raid group:

aggr add aggr 12@413

My old aggr1 now contains two raid group.

volume aggr1 (2 RAID groups):

        group 1: 12 disks

        group 0: 14 disks

Thanks all for the help.