Abstract: A disk for a disk drive including a disk body with a center through hole for fixing the disk body to a turntable formed at a center thereof, a clamping portion formed on the disk body around the center through hole to fix the disk body to the turntable, a signal recording portion which is formed on a surface of the disk body around a rim of the clamping potion and includes a signal recording section on which digital signals are recorded, and crack blocking portions bored through the clamping portion.

Abstract: The present invention relates to a disk for a disk drive. A disk for a disk drive according to the present invention comprises a disk body 32 with a center through hole 34 for fixing the disk body 32 to a turntable formed at a center thereof; a clamping portion 36 formed on the disk body 32 around the center through hole 34 to fix the disk body 32 to the turntable; a signal recording portion 38 which is formed on a surface of the disk body 32 around a rim of the clamping portion 36 and includes a signal recording section 39 on which digital signals are recorded; and crack blocking portions 42 bored through the clamping portion 36. According to the present invention, cracks c occurring on a rim of the center through hole 34 of the disk 30 are prevented from propagating to the signal recording portion 38. Thus, there is an advantage in that it is possible to prevent the disk to be damaged.