Disk drive with established resonance frequencies for damper member

A disk drive comprising:

• a disk rotating unit which mounts and rotates a disk;
• a traverse base which holds said disk rotating unit;
• a damper member which flexibly holds said traverse base;
• a main unit which holds said traverse base through said damper member;
• a tray which mounts a cartridge which houses said disk;
• a driving unit which loads or ejects said tray and accordingly moves said disk in said cartridge close to or away from said disk rotating unit, and
• a traverse base holding member which is moved vertically by said driving unit relative to said main unit at the time of tray loading or tray ejection, wherein:
• said cartridge is supported by said main unit through said tray,
• said traverse base is flexibly held by said traverse base holding member through said damper member, and
• the resonance frequencies of said damper member in the radius direction of said disk as it is being loaded and in the direction of a rotation shaft are set higher than the maximum rotational frequency of said disk.