Usable Capacity of disks & third party luns

[MOHAN1985]

Hi,

Is there a command that lists the usable capacity of disks on netapp filer?

If a filer is has storage from a third party, how can these be identified using Data ONTAP commands?.

Thanks,

Mohan

[aborzenkov]

On 7-mode “aggr status -r” lists both physical and useable (right-sized) capacity.

[MOHAN1985]

Thanks for the respose, I have the below output from the "aggr status -r" command, output lists only the used and phsysical capacities.

How can usable capacity (usually lesser than the physical capacity) of the disk be determined?

>aggr status -r

Aggregate aggr_1 (online, raid_dp) (block checksums)

  Plex /aggr_1/plex0 (online, normal, active, pool0)

    RAID group /aggr_1/plex0/rg0 (normal)

      RAID       Disk Device  HA  SHELF BAY CHAN Pool Type  RPM     Used (MB/blks)        Phys (MB/blks)

      dparity   0z.112  0a       7        3      FC:A   0         FCAL    10000    136000/278528000  137422/281442144

Thanks,

Mohan

[aborzenkov]

Used == usable.

[MOHAN1985]

But, the NetApp Storage administration guide suggests a formula,

Usable Capacity = Raw Capacity - System Reserve Capacity

which indicates usable capacity of a disk is not equal to the raw capacity of the disk.

For Example, let there be disk of  physical capacity 100GB, 10GB of the disk space is used for metadata and other purposes. In this case, only 90GB of disk space is available for usage (usable capacity)

How can this be obtained on ONTAP?

[aborzenkov]

10% of total aggregate size is reserved for internal use if this is what you mean.