Description: The amount of the storage represented by this entry that is allocated, in units of hrStorageAllocationUnits. Refer to RFC 1514, Host Resources MIB, http://info.internet.isi.edu/in-notes/rfc/files/rfc1514.txt, for more details. Additional information (printer): This object returns the amount of memory in use by the printer at the current time. This object should not be used when creating a print job for the device because the amount of memory in use will likely be different when the printer processes the print job. Additional information (mass storage): Applications can determine the amount of used space on the installed mass storage device by getting the hrStorageAllocationUnits object and this object. The amount of used space is these two returned values multiplied together. Returns the value 0 if the file system is not initialized. Returns status if attempting to perform a Get on this OID with no mass storage device installed.