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When creating LUNs, it’s generally a best practice to place them in Qtrees. Fortunately, it’s easy to create Qtrees with Data ONTAP PowerShell Toolkit; just use the New-NaQtree cmdlet:
New-NaQtree /vol/vol1/qt_vol1
Creates a Qtree called “qt_vol1” in the volume “vol1”
Now with the Qtree out of the way, it’s time to create a LUN. Sure, we could use the toolkit to create a LUN filer side, create an igroup and map it, then rescan the disks (that’s “rescan” | diskpart in PowerShell BTW), but then you’d have to give it a drive letter and format it and otherwise do a lot of work. It’s far easier to just create the LUN using the SnapDrive CLI right from within your PowerShell script. You’d do something like:
Sdcli disk create –d I:\ -p /vol/vol1/test.lun -z 10240 –dtype dedicated –rs n –IG MyLaptop igroup_iscsi
This creates a 10GB LUN in vol1 and attaches it as drive I:\ to my laptop via iSCSI with no space reserved for snapshots. Oops. I forgot all about that best practice of putting LUNs in Qtrees. Not to worry; you can use the Rename-NaLun cmdlet to move a LUN
Rename-nalun /vol/vol1/test.lun /vol/vol1/qt_vol1/test.lun
Not a problem.
Well, I just created a Thick LUN. What if I wanted to thin it? Easy:
Set-nalunspacereserved /vol/vol1/qt_vol1/test.lun –off
It’s a thin LUN now. While I’m at it, I’ll enable Dedupe on the volume:
Enable-NaSiS /vol/vol1
John
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Is there a better/native way to do the SLCI command with the latest powershell toolkit?
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You can do that with
Invoke-Nassh "<sdcli cmd>"
You can get detailed help for this cmdlet using
PS C:\Users\vinith> Get-Help Invoke-NaSsh -Detailed
An example below.
C:\PS>Connect-NaController dunn
C:\PS> Invoke-NaSsh aggr status
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hi John
i have few 1 tb luns that i would like to move into a separate qtrees
is "lun move" command non disruptive ?
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Yes it's non disruptive, but I would use the toolkit.
Rename-nalun /vol/vol1/test.lun /vol/vol1/qt_vol1/test.lun
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i created a lun (5gb) and moved into a qtree (2gb).
but the writes did not stop when qtree was full, even tough i did set up hard limit as 2gb.
how can i setup in such a way that when qtree is full, it shouldnt accept any more writes and accept only reads.