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Logical disk errors describe problems reading data from a drive that is mechanically fully functional. Data recovery software addresses ways to retrieve data from drives with logical errors. NEARLY ALL DATA RECOVERY SOFTWARE is for drives with logical errors, not physical or mechanical errors and such software typically inappropriate from data recovery from physically damaged drives. In some cases, use of data recovery software may result in you losing data you could have retrieved by other means.Logical Failure versus Physical Failure [[Logical Hard Drive Failure]] can occur making it difficult to access your data. Logical disk errors describe problems reading data from a drive that is mechanically fully functional. Data recovery software addresses ways to retrieve data from drives with logical errors. NEARLY ALL DATA RECOVERY SOFTWARE is for drives with logical errors, not physical or mechanical errors and such software typically inappropriate from data recovery from physically damaged drives. In some cases, use of data recovery software may result in you losing data you could have retrieved by other means.Causes of Drive FailureCauses of Physical Drive Failure == Head Crash ==The computer was banged or suffered impact while the hard drive was in read/write active (the heads were not parked). A head crash can damage both to the read heads and the surface of the platter. It is rare that there is surface only damage. Even if the damage is surface only, and those bad blocks can be marked by the operating system so the drive can continue in use, the data should be recovered and the drive replaced immediately. Such a drive will inevitably fail. The read write heads can also become misaligned as the result of a physical impact.