Archive for April 11th, 2016

Microsoft Sysinternals Tool SDelete (Secure Delete) v1.61 – Option -z Zero free space (good for virtual disk optimization)

Montag, April 11th, 2016

Imprivata OneSign – vereinfacht die An- und Abmeldung bei Anwendungen indem es die Eingabe von Benutzernamen und Passwörtern für authentifizierte Benutzer automatisiert

Montag, April 11th, 2016

VMware vSphere – reclaim unused space on thin provisioned disk

Montag, April 11th, 2016

vmware_logo.jpg   Administrators sometimes make the erroneous assumption that thin provisioned disks will automatically shrink in size allocated by the vSphere hypervisor when files are deleted – while the operating system might consider a file deleted (removing all pointers in the file allocation table in Windows, for example) the hypervisor doesn’t know about this status change and thus doesn’t reclaim the space

# vmkfstools –punchzero <VMfile>.vmdk

To maximize the effectiveness of this technique you should use operating system tools to overwrite all free space in the guest with zeroes

Linux:             # dd if=/dev/zero of=/[path]/zeroes bs=4096 && rm -f /[path]/zeroes
Windows:        C:\sdelete -z [drive letter]