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, 2016Imprivata OneSign – vereinfacht die An- und Abmeldung bei Anwendungen indem es die Eingabe von Benutzernamen und Passwörtern für authentifizierte Benutzer automatisiert
Montag, April 11th, 2016VMware vSphere – reclaim unused space on thin provisioned disk
Montag, April 11th, 2016Administrators 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]