I did a quick test with one of the LUN: "/vol/adc_netapp3_tier4_10/DS_Tier4_10"
Here follows:
PS C:\Documents and Settings\Administrator> Get-NaLun /vol/adc_netapp3_tier4_10/DS_Tier4_10
Path TotalSize Protocol Online Mapped Thin Comment
---- --------- -------- ------ ------ ---- -------
/vol/adc_netapp3_tier4_10/DS_Tier4_10 500.1 GB vmware True True False
PS C:\Documents and Settings\Administrator> Get-NaLun /vol/adc_netapp3_tier4_10/DS_Tier4_10 | Get-NaLunMap
InitiatorGroupName : VM_FCP
InitiatorGroupType : fcp
Initiators : {50:01:43:80:00:bf:e7:9c, 50:01:43:80:00:bf:e4:4a, 50:01:43:80:00:bf:e4:7a, 50:01:43:80
:00:bf:e2:02...}
InitiatorGroupOsType : vmware
InitiatorGroupPortsetName :
InitiatorGroupThrottleBorrow : False
InitiatorGroupThrottleReserve : 0
InitiatorGroupUsePartner : True
InitiatorGroupAluaEnabled : False
InitiatorGroupVsaEnabled : False
LunId : 89
PS C:\Documents and Settings\Administrator> Confirm-NaLunHasScsiReservation /vol/adc_netapp3_tier4_10/DS_Tier4_10
False
PS C:\Documents and Settings\Administrator> Get-NaLunPersistentReservation /vol/adc_netapp3_tier4_10/DS_Tier4_10
Get-NaLunPersistentReservation : Unable to find API: lun-get-persistent-reservation-info
At line:1 char:31
+ Get-NaLunPersistentReservation <<<< /vol/adc_netapp3_tier4_10/DS_Tier4_10
+ CategoryInfo : InvalidOperation: (NetApp.Ontapi.Filer.NaController:NaController) [Get-NaLunPersistentRe
servation], EAPIERROR
+ FullyQualifiedErrorId : ApiException,DataONTAP.PowerShell.SDK.Cmdlets.Lun.GetNaLunPersistentReservation
PS C:\Documents and Settings\Administrator> Get-nalunstatistics /vol/adc_netapp3_tier4_10/DS_Tier4_10
Path Read Written Read Ops Write Ops Other Ops Last Zeroed
---- ---- ------- -------- --------- --------- -----------
/vol/adc_netapp3_tier4_10/DS_Tier4_10 3.6 GB 14.9 GB 128k 710k 29k 04:52:30
PS C:\Documents and Settings\Administrator> Get-nalunstatistics /vol/adc_netapp3_tier4_10/DS_Tier4_10
Path Read Written Read Ops Write Ops Other Ops Last Zeroed
---- ---- ------- -------- --------- --------- -----------
/vol/adc_netapp3_tier4_10/DS_Tier4_10 3.7 GB 15.0 GB 130k 719k 29k 04:57:05
PS C:\Documents and Settings\Administrator> Confirm-NaLunHasScsiReservation /vol/adc_netapp3_tier4_10/DS_Tier4_10
False
As you can see, access to the LUN is constant (Write Ops and Read Ops always changing) but It did return "False" for ScsiReservation.
This LUN is been used by one VMWare ESX host cluster, it is formated using VMFS. I have a virtual machine running on it.
But shouldnt these ESX Hosts been reserving the LUN constantly ? Or these reservations are so quick that Im getting the intervals ? Or maybe they just access it from time to time ...
Anyway,
Thanks a lot John.