You can reclaim this space with the SDelete utility from Microsoft. With the -c option it will zero any free space on the volume. For example:
C:\>sdelete -c C: I've tested this with xVM and with compression enabled for the zvol, but it worked very well. Ed Plese On Tue, Nov 17, 2009 at 12:13 PM, Brent Jones <br...@servuhome.net> wrote: > I use several file-backed thin provisioned iSCSI volumes presented over > Comstar. > The initiators are Windows 2003/2008 systems with the MS MPIO initiator. > > The Windows systems only claim to be using about 4TB of space, but the > ZFS volume says 7.12TB is used. > Granted, I imagine ZFS allocates the blocks as soon as Windows needs > space, and Windows will eventually not need that space again. > Is there a way to reclaim un-used space on a thin provisioned iSCSI target? > > > > -- > Brent Jones > br...@servuhome.net > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss