ONTAP Discussions

Netapp Capacity Report

NAYABRASOOL
3,089 Views

Hi All,

We have 30 SAS disks in our environment and i would like to know what will be the total size of these disks and USABLE SIZE ,WAFL RESERVE , AGGR SNAP RESERVE etc..

Please note we don't have SNAPSHOT at VOLUME LEVEL but we have only at the AGGR level.

Thanks,

Nayab

1 ACCEPTED SOLUTION

bsti
3,089 Views

These will NOT be exact numbers obviously, but it appears you are calculating with 300 GB disks but not right-sizing them.  300 GB disks actually right-size to 272 GB each, I think.

So you should see something like this:

30 disks, 2 parity, 28 data disks

Aggr Size:  28 * 272 = 7616 GB

WAFL Reserve:  7616 * .10 = 762 GB

Aggr Reserve:  7616 * .05 = 381 GB

Usable Aggr Size:  7616 - 762 - 381 = 6473 GB

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3 REPLIES 3

NAYABRASOOL
3,089 Views

Are these are right figures please confirm ??

bsti
3,090 Views

These will NOT be exact numbers obviously, but it appears you are calculating with 300 GB disks but not right-sizing them.  300 GB disks actually right-size to 272 GB each, I think.

So you should see something like this:

30 disks, 2 parity, 28 data disks

Aggr Size:  28 * 272 = 7616 GB

WAFL Reserve:  7616 * .10 = 762 GB

Aggr Reserve:  7616 * .05 = 381 GB

Usable Aggr Size:  7616 - 762 - 381 = 6473 GB

AGUMADAVALLI
3,089 Views

Hi there,

Just take away 30% from the total GB(#of disks * size of the disk), that will be your usable capacity.

thank you,

AK G

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