公开(公告)号：CA2105354A1

公开(公告)日：1994-07-01

申请号：CA2105354

申请日：1993-09-01

Applicant: IBM

Inventor： OTTESEN HAL H ,  FLORYANCE GREGORY G

IPC: G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G06B20/10

Abstract: In a storage device, such as a magnetic rigid disk drive, data is stored at varying linear densities in the user data storage portions to increase the effective storage capacity of the device as a function of the differences in soft error rate tolerance associated with the various types of data being stored and the ability of non-alphanumeric data to be enhanced by reconstruction or smoothing rather than by an error correction code. A data type signal included with incoming data dictates the recording frequency and a control signal associated with the recorded data block is read when data is addressed to appropriately adjust the clock frequency for reading such addressed stored data.