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how to create Raid Groups and add them to an aggregare ??

how to create Raid Groups and add them to an aggregare ??

Please suggest

~Sanjeev

Re: how to create Raid Groups and add them to an aggregare ??

If you have a test system, that would be great to work with, or download the NetApp VSIM to do some exercises with this.  Basically, the aggregate create and aggregate add command automatically handle creating raid groups.  The default raid group size for dual parity with SATA is 14 and 16 with FC/SAS.. So for example, if you create an aggregate with 32 600GB SAS drives, ONTAP will automatically create 2 raid groups of 16.  If you then add 10 more drives (best practice is a full raid group at a time though) it will automatically create a new 3rd raid group with those 10 drives.  Then if you add 22 more, it will fill out the 3rd raid group to 16 (from 10) and create a 4th raid group of 16 automatically.  You can also change the default raid size and also add drives manually to existing raid groups, or force creation of a new raid group.  ONTAP is flexible to do almost anything you want (within the aggr and rg size limits) but the automatic volume management to create new raid groups works well.

You could test with both System Manager (GUI) and the command line "aggr create" and "agg add" command to learn the syntax.  Some only use System Manager which works well, but if you want to do some things like add to an existing raid group, learning the cli is good to know.

Re: how to create Raid Groups and add them to an aggregare ??

Thanks Scott for the wonderful explanation .

What command can be used to check the raid group status of the aggregate ? and Where plex comes into the picture ?

Re: how to create Raid Groups and add them to an aggregare ??

The easiest way is "sysconfig -V". Uppercase V for a summary disk count per aggr and raid group. Or the GUI representation in the oncommand software. You can also run "aggr status -r" r the equivalent "sysconfig -r" to get raid groups and spares in detail.

Sent from my iPhone 4S

Re: how to create Raid Groups and add them to an aggregare ??

Plex is when you run syncmirror. Pool0 and pool1 to ensure spares go to the right pool so that syncmirror plexes (disks) stay on separate loops/stacks for redundancy.

Sent from my iPhone 4S

Re: how to create Raid Groups and add them to an aggregare ??

Awesome Scott..