topic Re: Reclaim space in LUN. in Microsoft Virtualization Discussions

Reclaim space in LUN.

SCOTT_V_RONTALE — Thu, 05 Jun 2025 05:34:39 GMT

Hi everyone ,

How can we reclaim space in LUN, The reports says there is a capacity mismatch between the host and storage system. Is there a manual way or such commands that can reclaim space in lun because we don't have a snapdrive.

Thanks

Re: Reclaim space in LUN.

mecd200000 — Tue, 01 Jul 2014 00:18:56 GMT

What OS Do you use? If you are using a redhat 6.x or ubuntu 12.x, type a fstrim /mount point.

ex> df -h

/dev/sdb /mnt -> cd / -> fstrim /mnt

To use fstrim, You must use ext4 format using mkfs -t ext4.

Reclaim space in LUN.

SCOTT_V_RONTALE — Tue, 01 Jul 2014 00:35:11 GMT

Its on a VM and the guest OS is windows.

Re: Reclaim space in LUN.

erikdenburger — Wed, 23 Jul 2014 07:35:13 GMT

We use the ontap powershell module. There is a space reclaim function in that module.

Windows Server 2012R2 will reclaim space automaticly

Re: Reclaim space in LUN.

CANARAHSBCLIFE — Thu, 24 Jul 2014 11:22:49 GMT

for non space reserved lun with thin-provisioned volumes VM/physical windows server - snapdrive space reclaimer works perfectly...

In case of space reserved luns... I have experienced volume getting full after space reclaimer is run. Anyone has any resolution to this problem ???