Data Backup and Recovery Discussions

Space reclaimation LUN Provisioned on windows server 2012 Core

1VINAYKUMAR

Hi Guys,

 

I have a windows server 2012 core on which thick LUNs are provisioned from netApp cluster. now when i check the spaceUsed column using the powershell command Get-NCLUN . it shows Size and SizeUsed value as same, and when i check the LUN space from windows, there is enough free space available.

 

is there any way if we can reclaim the space on netapp side.

 

regards

VK

3 REPLIES 3

gestionesan

Hi,

 

from command line, with powershell (you have to install DataOntap PS module), we do this:

 

(host side, from powershell)

PS C:\Users\u0xxx> get-module -listavailable  (so You can verify you have the relative PS module)

ModuleType Name ExportedCommands
---------- ---- ----------------
Manifest ActiveDirectory {}
......
Manifest BestPractices {}
Manifest BitsTransfer {}
Manifest DataONTAP {}                   !!!!!!!!!
Manifest FailoverClusters {}
........

.......

......

 


PS C:\Users\u00xxx> Import-Module DataONTAP

Security Warning
Run only scripts that you trust. While scripts from the Internet can be useful, this script can potentially harm your
computer. Do you want to run C:\Windows\system32\WindowsPowerShell\v1.0\Modules\DataONTAP\DataONTAP.Alias.psm1?
[D] Do not run [R] Run once [S] Suspend [?] Help (default is "D"): r


PS C:\Users\u0xxxx>$hostdisks =Get-NaHostDisk - dataOntap
echo $hostdisks

 

so You can obtain disk list 

PS C:\Users\u0xxxx> $hostdisks =Get-NaHostDisk -dataOntap
PS C:\Users\u0xxxx> echo $hostdisks

HostDrivePath Disk Size ControllerPath
------------- ---- ---- --------------
.....

.........
\\?\Volume{0626c0ff-cf62-46... 28 1,7 TB filer:/vol/vol_prodmysit_contdb1/lun11.lun
\\?\Volume{fccb2952-b21d-44... 29 1,2 TB filer:/vol/vol_prodmysit_contdb2/lun12.lun
.......
\\?\Volume{b9c60a94-97c4-4d... 33 1,2 TB filer:/vol/vol_prodmysit_contdb6/lun16.lun

 

now You have to identify the volume You want to reclaim (es : lun12.lun) and take note of whick disk (es disk 29)


so, You can launch space reclaim

 

es.
Invoke-NaHostVolumeSpaceReclaim -Path $hostdisks[29].hostdrivepath -confirm:$false -UnmapSize 1MB

 

 

before of space reclaim:
filer*> lun show -v /vol/vol_prodmysit_contdb2/lun12.lun
/vol/vol_prodmysit_contdb2/lun12.lun 1.2t (1342291668480) (r/w, online, mapped)
Comment: " "
Serial#: HndthJbb6qy9
Share: none
Space Reservation: disabled
Multiprotocol Type: windows_2008
Maps: viaRPC.20:00:00:25:b5:0b:c2:1f.server=51 viaRPC.20:00:00:25:b5:0a:c1:af.server=51 viaRPC.20:00:00:25:b5:0b:a0:af.....

......
Occupied Size: 1.1t (1217104642048)
Creation Time: Mon Mar 14 14:59:05 MET 2011
Alignment: aligned
Cluster Shared Volume Information: 0x1
Space_alloc: disabled


after space reclaim:


filer*> lun show -v /vol/vol_prodmysit_contdb2/lun12.lun
/vol/vol_prodmysit_contdb2/lun12.lun 1.2t (1342291668480) (r/w, online, mapped)
Comment: " "
Serial#: HndthJbb6qy9
Share: none
Space Reservation: disabled
Multiprotocol Type: windows_2008
Maps: viaRPC.20:.....

Occupied Size:  476.2g (511325540352)
Creation Time: Mon Mar 14 14:59:05 MET 2011
Alignment: aligned
Cluster Shared Volume Information: 0x1
Space_alloc: disabled

 

bye

Monardo G.A.

ol15

NigelM

Hi VK 

 

If yo install snapdrive on the windows 2012 server you can use space reclaimation feature.  Right click on the LUN in question and select space relaimation, depending on the amount of space to be reclaimed it can take a while to complete

 

Nigel

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