Comment gagner de l’espace sur le disque système Windows 7 (winsxs cleanup)

J’ai découvert cette semaine qu’il existe un dossier « c:\Windows\winsxs », et qu’il est particulièrement gourmand en espace disque pour peu qu’on fasse quelques mises à jour système.

Sur mon pc fixe le dossier faisait 11,755 Go

winsxs_before

Après avoir exécuté la commande DISM /online /Cleanup-Image /SpSuperseded le dossier ne faisait plus que 8,037 Go, 

winsxs_after

soit une économie de 3.7Go, ce qui est plutôt intéressant. Cette différence n’est pas commune à toutes les installations, entre le portable et un autre fixe le gain est compris entre 2 et 5 Go.

Cette commande nettoie les fichiers d’installation, mais ne permet plus par la suite de désinstaller un Service Pack.

La manipulation dure entre 2 et 10 minutes en fonction de la vitesse du disque.

winsxs command

Curiosity Parachute Landing Spotted by NASA Orbiter [detail]

Via Flickr:
NASA image captured Aug. 5, 2012

View the full high res file here: www.flickr.com/photos/gsfc/7727084278

NASA’s Curiosity rover and its parachute were spotted by NASA’s Mars Reconnaissance Orbiter as Curiosity descended to the surface on Aug. 5 PDT (Aug. 6 EDT). The High-Resolution Imaging Science Experiment (HiRISE) camera captured this image of Curiosity while the orbiter was listening to transmissions from the rover. Curiosity and its parachute are in the center of the white box; the inset image is a cutout of the rover stretched to avoid saturation. The rover is descending toward the etched plains just north of the sand dunes that fringe "Mt. Sharp." From the perspective of the orbiter, the parachute and Curiosity are flying at an angle relative to the surface, so the landing site does not appear directly below the rover.

The parachute appears fully inflated and performing perfectly. Details in the parachute, such as the band gap at the edges and the central hole, are clearly seen. The cords connecting the parachute to the back shell cannot be seen, although they were seen in the image of NASA’s Phoenix lander descending, perhaps due to the difference in lighting angles. The bright spot on the back shell containing Curiosity might be a specular reflection off of a shiny area. Curiosity was released from the back shell sometime after this image was acquired.

This view is one product from an observation made by HiRISE targeted to the expected location of Curiosity about one minute prior to landing. It was captured in HiRISE CCD RED1, near the eastern edge of the swath width (there is a RED0 at the very edge). This means that the rover was a bit further east or downrange than predicted.

The image scale is 13.2 inches (33.6 centimeters) per pixel .

HiRISE is one of six instruments on NASA’s Mars Reconnaissance Orbiter. The University of Arizona, Tucson, operates the orbiter’s HiRISE camera, which was built by Ball Aerospace & Technologies Corp., Boulder, Colo. NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Mars Reconnaissance Orbiter Project for NASA’s Science Mission Directorate, Washington. Lockheed Martin Space Systems, Denver, built the spacecraft.

Credit: NASA/JPL-Caltech/Univ. of Arizona

NASA image use policy.

NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission.

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