Magnetic recording disk with high internal stress to reduce disk deflections from shock forces and methods for use with the disk

An apparatus, comprising:

• a plurality of magnetic recording disks in a stacked configuration including:
• a first magnetic recording disk having a thickness less than or equal to 0.5 millimeters (mm) and an internal stress greater than or equal to 300 megapascals (MPa);
• a second magnetic recording disk having a thickness less than or equal to 0.5 mm and an internal stress less than 300 MPa;
• and
• a third magnetic recording disk having a thickness less than or equal to 0.5 mm and an internal stress greater than or equal to 300 MPa;
• wherein the second magnetic recording disk is between the first magnetic recording disk and the third magnetic recording disk;
• wherein at least one spacer is in contact with and disposed between each adjacent pair of the magnetic recording disks of the plurality of magnetic recording disks;
• and
• wherein the plurality of the magnetic recording disks are clamped together by a clamping mechanism that comprises:
• a perimeter portion of a hub that is in contact with the first magnetic recording disk;
• and
• a perimeter portion of a top clamp that is in contact with the third magnetic recording disk.