MAGNETIC DISK DEVICE

PURPOSE:To prevent the intrusion of dust, steam and an organic gas component into each HDA in a magnetic disk device, in which a plurality of the HDAs are arranged in an array type. CONSTITUTION:An HDA storage chamber 3 surrounded by a sealed vessel 3a is mounted into a box body 2, a large number of HDAs 1d-1p are housed in the storage chamber 3, and a clean air chamber 14 is installed into the HDA storage chamber 3. Humidity control means 11, 11a containing silica gel, etc., and organic-gas component removing means 12, 12a comprising activated carbon and silica gel, etc., are set up into the storage chamber 3 and the clean air chamber 14. Valves are opened at the time of connection and sections among the HDAs and the chamber 14 are ventilated regarding a filter 13, a door 15, a seal 16 and connectors 17, 18 coupling each HDA and the chamber. The intrusion of steam and a gas into the HDAs is prevented by the means 11, 12, 11a, 12a.