CARTRIDGE HANDLING• The disk cartridge contains information vital to sys-tem operation which may not be easily duplicated.HANDLE THE CARTRIDGE WITH CARE!CAUTIONS• No pens or pencils.Never write on diskcartridge. Writingpressure damages disk.• No smoking whilehandling cartridges.• Return cartridge toenvelope whenever itis removed from theconsole file.• Do not touch orclean the disk surface.• Replace cartridgeenvelopes when theybecome worn, cracked,or distorted.• Keep cartridgeaway from mag-netic fields or fromferromagnetic materialswhich might bemagnetized.• Do not exposecartridges to heator sunlight.• Store cartridges in theiroriginal shipping cartons,or in the storage rack on'the access door.IConsole File 27

IBM System/370 145 Operating Procedures Manual