Abstract: A floor mat including a carpet portion, one or more hook-and-loop fastener portions, an anti-slip portion, and an edge portion is provided. The carpet portion is disposed on a top surface. The one or more hook-and-loop fastener portions are disposed on a bottom surface, each of which being corresponds to a counter fastener portion installed on a floor. The anti-slip portion is disposed on the bottom surface, comprising a plurality of bumps protruding downward from the bottom surface. The edge portion surrounds and secures the top and bottom surface. The bumps are disposed in a predetermined density and pattern. The carpet portion may comprise durable fabric.

Abstract: A method of detecting a crack in a disc loaded on a disc drive and a method of automatically lowering a target speed in response to the detection of a crack in order to stabilize the disc drive. According to the methods, it is automatically determined whether a disc loaded on a disc drive has a crack in a specific mode, and a target speed is automatically changed into a low speed when it is determined that the disc has a crack. Therefore, the crack state of the disc is exactly checked during action of the disc drive, the percentage of error occurrence is decreased, and the probability of damage to the disc is reduced.

Abstract: A method of detecting a crack in a disc loaded on a disc drive and a method of automatically lowering a target speed in response to the detection of a crack in order to stabilize the disc drive. According to the methods, it is automatically determined whether a disc loaded on a disc drive has a crack in a specific mode, and a target speed is automatically changed into a low speed when it is determined that the disc has a crack. Therefore, the crack state of the disc is exactly checked during action of the disc drive, the percentage of error occurrence is decreased, and the probability of damage to the disc is reduced.