NS0-157 · Question #328
Which command creates a new SyncMirror aggregate, letting Data ONTAP select the disk drives?
The correct answer is B. aggr create aggrX -m 12. The -m flag in the aggr create command instructs Data ONTAP to create a new SyncMirror (mirrored) aggregate, with the numeric argument specifying the number of disks and letting Data ONTAP automatically select them.
Question
Which command creates a new SyncMirror aggregate, letting Data ONTAP select the disk drives?
Options
- Aaggr create aggrX -d 12
- Baggr create aggrX -m 12
- Caggr mirror aggrX -m 12
- Daggr mirror aggrX -n 12
How the community answered
(43 responses)- A2% (1)
- B88% (38)
- C2% (1)
- D7% (3)
Why each option
The -m flag in the aggr create command instructs Data ONTAP to create a new SyncMirror (mirrored) aggregate, with the numeric argument specifying the number of disks and letting Data ONTAP automatically select them.
The -d flag specifies an explicit list of disk drive names to include in the aggregate, not the mirrored flag, so this command would create an unmirrored aggregate using manually chosen disks.
The command 'aggr create aggrX -m 12' uses the -m option to designate the new aggregate as a SyncMirror aggregate, where 12 is the total disk count split evenly across two plexes; omitting a specific disk list causes Data ONTAP to auto-select suitable drives from available spare pools.
'aggr mirror' is the command used to add a mirror plex to an already existing unmirrored aggregate, not to create a brand new SyncMirror aggregate from scratch.
'aggr mirror aggrX -n 12' uses the mirror subcommand (for existing aggregates) and -n is not the valid flag for auto disk selection in new aggregate creation, making this command incorrect for the described task.
Concept tested: Creating a SyncMirror aggregate with auto disk selection
Source: https://docs.netapp.com/us-en/ontap/disks-aggregates/mirroring-aggregates-concept.html
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